SK41796A3 - Adjusting device for awnings and roller shutters - Google Patents

Abstract

A device is disclosed for continuously adjusting the speed of rotation of devices driven by electric motors in shadowing devices such as awnings, roller shutters, blinds or the like. The arrangement (7) that for example linearly moves or rotates the shadowing device co-operates with an analogue distance sensor (20), for example a potentiometric, inductive or similar distance sensor. The working end positions of the shadowing device may be determined by an adjustment member (14).

Description

Technical field

The invention relates to an adjusting device for awnings and window blinds or to other blinds with blinds driven solely by an electric motor.

BACKGROUND OF THE INVENTION

An adjusting device of this kind is used in blackout systems where all parts are located in the hollow shaft on which the coating is wound. Such a solution makes it difficult to adjust the end positions by means of limit switches located in or on the hollow shaft. In case of damage, the limit switches are difficult to dismantle and to be replaced or repaired.

SUMMARY OF THE INVENTION

These drawbacks are overcome by an adjusting device for awnings and window blinds or other blackout systems, for example with blinds, according to the invention, which is based on the fact that the position sensor is connected to the adjusting node and the adjusting block. The connection is electrical or electromagnetic. The foil sensor has a number of embodiments, such as potentiometric, inductive or optical. The adjusting node is axially displaceably mounted on a spindle which is supported in the support shaft. Preferably, the spindle axis is parallel to the axis of the support shaft. The adjustment node is connected to the position sensor by means of the slider. The position sensor is located in the support shaft, wherein the adjusting block is outside the support shaft at an appropriate distance.

Advantages of the design of the adjusting device for awnings and window blinds are that the adjustment of the two end positions of the blackout system is smooth and accurate even in the event of a power failure. Setting end positions is easy.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments of an adjusting device for awnings and window blinds, as well as other blinds with blinds, are schematically shown in the drawings, wherein FIG. 1 is a longitudinal section of the support shaft, the adjusting block, and the registration memory. Fig. 2 shows section II-II of FIG. First

Examples of implementation of the technical solution

Adjusting device for awnings and window blinds, consisting of a support shaft 1, preferably hollow, in which a rotor 5 is located, provided with an internal toothed gear 2, in which the internal gear 16 of the spindle 6, rotatably mounted in the body 3 The spindle 6 is parallel to the support shaft 1 and is provided with an external thread into which the thread of the adjusting node 7 engages simultaneously on the spindle 6. The adjusting node 7 is provided with a slider 8 which is detachably connected by a screw 16. it is in contact sliding connection with the resistor 10 of the position sensor 20, which is fixed by the retaining feet 13 of the body 3. The adjusting node 7 is simultaneously mounted in the guide 17 of the body 3. The resistance 10 is fixed on the carrier 9 which extends into the retaining feet 13. The support shaft 1 is mounted in bearings and connected to a motor 11, preferably an electric motor. The position sensor 20 is connected by a connecting line 12 to a power source 100 and an adjusting block 14, which is located in the wall 19. The adjusting block 14 has two independent resistors 90 and 91 and switches 92 and 93. An evaluation device is connected to the current source 100. not shown in the accompanying drawings. The adjusting node 7 performs linear or rotary movements and is operative in connection with a position sensor 20 operating potentiometrically. The support shaft 7 is located at the top of the window and extends beyond the width of the window. When rotating the spindle 6, the adjusting node 7 moves on the thread to the right or left. Depending on the relative position of the slider 8 relative to the position sensor 20, the resistance measured by the adjusting block 14 'varies. The end working positions correspond to a certain resistance or a certain induction of the position sensor 20, which is stored. When setting both end working positions, it is necessary to activate the adjusting block 14, which also serves as a resuper when the support shaft 1 reaches the end position. The evaluation device connected to the current source 100 compares the varying resistance of the position sensor 20 with the set resistances of the adjusting block 14 by means of the independent resistors 90 with < 91 > Switching the motor 11 on and off by means of switches 92 and 93 «Variable resistance position sensor 20 according to the operating position of the slider 8 changes the position until the resistance of the position sensor 20 is identical to the set resistance 90 or 91.

According to the test results, position sensors can be operated with an accuracy of 100 mm, which in the area of blackout systems is rarely achievable and practically assured throughout the service life. The deviation from this positioning accuracy becomes apparent after more than one million actuations, while being negligible and of low impact and importance for practical use. The wintering systems are activated up to 7,000 times during their lifetime. The device works practically without wear.

The adjusting block 14 maintains the set values even in the event of a power failure, for example in the event of a short circuit or when the battery is discharged, which is not common with prior art devices in which the end operating positions have to be reset in the event of a power failure.

The position sensor 20 operates analogously, for example potentiometrically, inductively or optically.

Claims (7)

PATENT CLAIMS An adjusting device for awnings and window blinds, comprising a motor, which is coupled to a rotatably mounted bearing shaft having a position sensor, characterized in that the position sensor (20) is connected to an adjusting node (7) and to an adjusting block / 14 /. Adjusting device for awnings and window blinds according to claim 1, characterized in that the adjusting node (7) is axially displaceably mounted on a spindle (6) mounted in the support shaft (1). Adjusting device for awnings and window blinds according to claims 1 and 2, characterized in that the spindle (6) is parallel to the support shaft (1). Adjusting device for awnings and window blinds according to claims 1 to 3, characterized in that the adjusting node (7) is provided with a slider (8) connected to a position sensor (20). Adjusting device for awnings and window blinds according to Claims 1 to 3, characterized in that the position sensor (20) is mounted in the support shaft (1). Adjusting device for awnings and window blinds according to claims 1 to 5, characterized in that the adjusting block (14) is located outside the support shaft (1). Adjusting device for awnings and window blinds according to claims 1 to 6, characterized in that the adjusting block (14) is electrically and / or electromagnetically connected to the position sensor (20) by means of a connecting line (12).