Roller blind, process for manufacturing same and roller blind system with such a roller blind

Abstract

A roller blind (10) with a curtain that can be wound up on a winding shaft and can be unwound against a spring tension, with a spring (31) for generating the spring tension. The spring (31) is configured such that the curtain remains in each unwound position in a self-retaining manner. A manufacturing effort can be reduced during the assembly by the spring drive being assembled from one or more modularly connected, prefabricated partial springs (31).

Claims

1. A roller blind with a curtain, which can be wound up on a winding shaft and can be unwound against a spring tension, the roller blind comprising: a spring for generating the spring tension; at least one fastening piece configured to interact with a wall bracket; a setting device associated with the at least one fastening piece, the setting device being configured for setting a pretension of the spring, wherein the setting is carried out such that locking is possible several times; a snap ring; and a profiled grooved shaft with a longitudinal groove, which is functionally connected with the setting device and adapted to rotate in unison, wherein: the profiled grooved shaft is held with the snap ring; the spring is configured such that the curtain remains self-retaining in each unwound position; and the spring comprises one or more modularly prefabricated partial springs, each of the one or more modularly prefabricated partial springs comprising a stock partial spring length.

2. A roller blind in accordance with claim 1, wherein: the one or more partial springs comprise helically wound torsion springs; each of the torsion springs comprises a coupling element at at least one end; and the torsion springs are extended and/or have an internal diameter of 19 mm.

3. A roller blind in accordance with claim 1, wherein: the one or more partial springs are formed from wire with a thickness of one of 0.9 mm, 1.0 mm, 1.2 mm and 1.5 mm; the one or more partial springs are prefabricated in gradations smaller than or equal to 50 mm and multiples thereof; and the one or more partial springs are prefabricated in a length of one of 200 mm, 100 mm, 50 mm and 25 mm.

4. A roller blind in accordance with claim 1, wherein the one or more partial springs or corresponding assembly components are color-coded.

5. A roller blind in accordance with claim 1, further comprising a coupling piece for coupling to two of the one or more partial springs, the coupling piece having coupling projections configured and arranged radially and/or axially, offset in relation to one another.

6. A roller blind in accordance with claim 1, further comprising a partial spring carrier, the partial spring carrier being configured to cooperate with the one or more partial springs, wherein the partial spring carrier has a slide bearing and/or an end with a functional connection with the profiled grooved shaft and the partial spring carrier is adapted to rotate in unison with the profiled grooved shaft.

7. A roller blind with a curtain, which can be wound up on a winding shaft and can be unwound against a spring tension the roller blind comprising: a spring for generating the spring tension, the spring being configured such that the curtain remains self-retaining in each unwound position, the spring comprising one or more modularly prefabricated partial springs, each of the one or more modularly prefabricated partial springs comprising a stock partial spring length; at least one fastening piece configured to interact with a wall bracket; a setting device associated with the fastening piece, the setting device being configured for setting a pretension of the spring, wherein the setting is carried out such that locking is possible several times; and a driving head arranged adjacent to the fastening piece, wherein the driving head has a thread, on which thread a nut is configured to connect to the winding shaft and configured to rotate in unison therewith.

8. A roller blind in accordance with claim 7, wherein: the one or more partial springs comprise helically wound torsion springs; each of the torsion springs comprises a coupling element at at least one end; and the torsion springs are extended and/or have an internal diameter of 19 mm.

9. A roller blind in accordance with claim 7, wherein: the one or more partial springs are formed from wire with a thickness of one of 0.9 mm, 1.0 mm, 1.2 mm and 1.5 mm; the one or more partial springs are prefabricated in gradations smaller than or equal to 50 mm and multiples thereof; and the one or more partial springs are prefabricated in a length of one of 200 mm, 100 mm, 50 mm and 25 mm.

10. A roller blind in accordance with claim 7, further comprising: a snap ring; and a profiled grooved shaft with a longitudinal groove, which is functionally connected with the setting device and adapted to rotate in unison, wherein the profiled grooved shaft is held with the snap ring.

11. A roller blind in accordance with claim 7, wherein: the driving head is functionally connected with the at least one partial spring to rotate in unison therewith by means of at least one coupling piece and by an output at an end of the spring and/or; one of the partial springs has an end that faces away from the driving head.

12. A process for manufacturing a roller blind for a curtain, which can be wound up on a winding shaft and can be unwound against a spring tension, the roller blind comprising a spring for generating the spring tension, wherein the spring is configured such that the curtain remains self-retaining in each unwound position, the process comprising the steps of: providing the spring as one or more modularly prefabricated partial springs; and selecting a number of partial springs from the one or more modularly prefabricated partial springs, each of the one or more modularly prefabricated partial springs comprising a stock partial spring length, wherein: at least one fastening piece is arranged at an end of the roller blind; the at least one fastening piece interacts with a wall bracket; a setting device is associated with the fastening piece for setting a pretension of the spring; the pretension setting is carried out such that locking is possible several times; a profiled grooved shaft with a longitudinal groove is functionally connected with the setting device so as to rotate in unison therewith; and the profiled grooved shaft is held to the setting device with a snap ring.

13. A process in accordance with claim 12, wherein the one or more modularly prefabricated partial springs comprise helically wound torsion springs with a coupling element at at least one end, wherein the torsion springs are extended and/or have an internal diameter of 19 mm.

14. A process in accordance with claim 12, wherein: the one or more partial springs are made of wire with a thickness of one of 0.9 mm, 1.0 mm, 1.2 mm and 1.5 mm; the one or more partial springs are modularly prefabricated in said thicknesses; the one or more partial springs are prefabricated in gradations smaller than or equal to 50 mm and multiples thereof; and the one or more partial springs are prefabricated in lengths of 200 mm, 100 mm, 50 mm, and 25 mm.

15. A process in accordance with claim 12, wherein: the one or more partial springs are color-coded partial springs; and/or color-coded assembled components are used.

16. A process in accordance with claim 12, wherein: a coupling piece is used for coupling to the one or more partial springs; the coupling piece has at least one coupling projection; and the coupling piece has a centering washer.

17. A process in accordance with claim 12, wherein a carrier with a slide bearing and/or an end having a functional connection with a grooved shaft and adapted to rotate in unison with the grooved shaft is used for carrying the partial spring.

18. A process for manufacturing a roller blind for a curtain, which can be wound up on a winding shaft and can be unwound against a spring tension, the roller blind comprising a spring for generating the spring tension, wherein the spring is configured such that the curtain remains self-retaining in each unwound position, the process comprising the steps of: providing the spring as one or more modularly prefabricated partial springs; and selecting a number of partial springs from the one or more modularly prefabricated partial springs, each of the one or more modularly prefabricated partial springs comprising a stock partial spring length, wherein a driving head is arranged adjacent to a fastening piece, wherein the driving head has a thread, on which thread a nut is configured to connect to the winding shaft and configured to rotate in unison therewith.

19. A process in accordance with claim 18, wherein: at least one fastening piece is arranged at an end of the roller blind; the at least one fastening piece interacts with a wall bracket; a setting device is associated with the fastening piece for setting a pretension of the spring; and the pretension setting is carried out such that locking is possible several times.

20. A process in accordance with claim 18, wherein: a profiled grooved shaft with a longitudinal groove is functionally connected with a setting device so as to rotate in unison therewith; and the profiled grooved shaft is held to the setting device with a snap ring.

21. A process in accordance with claim 18, wherein a carrier with a slide bearing and/or an end having a functional connection with a grooved shaft and adapted to rotate in unison with the grooved shaft is used for carrying the partial spring.

22. A process in accordance with claim 18, wherein: the driving head is functionally connected with the at least one partial spring to rotate in unison therewith by means of at least one coupling piece and by an output at an end of the spring and/or; one of the partial springs has an end that faces away from the driving head.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the drawings:

(2) FIG. 1 is a partial view (top) and a cut-away partial view (bottom) of the essential details of a roller blind having the features of the present invention as a first exemplary embodiment;

(3) FIG. 2 is a perspective view of a grooved shaft of the roller blind according to FIG. 1;

(4) FIG. 3 is a cut-away partial view of a driving head of the roller blind according to FIG. 1;

(5) FIG. 4 is a partial view of a carrier of the roller blind according to FIG. 1; and

(6) FIG. 5 is a side view of a spring assembly of another exemplary embodiment having the features of the present invention.

DESCRIPTION OF PREFERRED EMBODIMENTS

(7) Referring to the drawings, FIG. 1 shows a partial view (top) and a cut-away partial view (bottom) of the essential details of a roller blind 10 having the features of the present invention as a first exemplary embodiment. The roller blind 10 has a driving head 11 arranged at the left-hand end of the roller blind 10 in the figure and an output 12 arranged farther on the inside of the roller blind 10. The driving head 11 has a fastening piece 13, which interacts in the assembled state with a wall bracket, not shown in the figure.

(8) A shaft adapter 34, on which a winding shaft, not shown in the figure, for a curtain, likewise not shown in the figure, is arranged in a manner adapted to rotate in unison and hence rotatably in relation to the fastening piece 13 on the fastening piece 13 in the assembled state. A threaded section 15 is fastened in a manner adapted to rotate in unison with the fastening piece 13, adjoining the latter axially. A nut 16 is arranged rotatably on the threaded section 15. The external circumference of the nut 16 is connected in the assembled state in a manner adapted to rotate in unison with and axially displaceably to the winding shaft, which is not shown in the figure.

(9) Starting from the driving head 11, a grooved shaft 17 with an elongated groove 18 extends in the interior of the roller blind 10. The longitudinal groove 18 extends in the exemplary embodiment shown over the entire length of the grooved shaft 17. A secondary drive 19 is arranged rotatably about the longitudinal axis in the interior of the fastening piece 13. The secondary drive 19 has an approximately cylindrical shape and has on its outer circumferential surface a plurality of ramps 20, which interact with ramps 21 on the inner circumference of the fastening piece 13. On the end face and facing an open end of the fastening piece 13 for receiving a wall bracket, the secondary drive 19 has a hexagon socket 22. At its end facing away from the hexagon socket 22, the secondary drive 19 has a mount 23 for the grooved shaft 17. Enclosing the outer circumference of the secondary drive 19, a spring 24 is arranged, with which the secondary drive 19 is pretensioned axially away from the threaded section 15 and towards the open end of the fastening piece 13.

(10) A carrier 25, which has, on the whole, a cylindrical configuration and has a first section 26 and a second section 27, is arranged at the end of the threaded section, which end faces away from the secondary drive 19. The grooved shaft 17 extends axially through the carrier 25. The first section 26 is connected in a manner adapted to rotate in unison with the grooved shaft 17, but is mounted rotatably in the threaded section 15.

(11) A spring adapter 28 is connected in a manner adapted to rotate in unison with the second section 27 facing away from the first section 26. The spring adapter 28 has an essentially cylindrical shape. On its outer circumference, the spring adapter 28 has a plurality of projections 29, which are configured as lugs 29. At its end facing away from the carrier 25, the spring adapter 28 has a cylindrical connection piece 33. A hollow shaft 30 is arranged in a manner adapted to rotate in unison on the connection piece 33. Enclosing the hollow shaft 30, a partial spring 31 is arranged, which has respective coupling elements 32 at its ends, which face away from one another. The coupling elements 32 are configured as hooks in the exemplary embodiment shown. The hooks 32 have a U shape and interact with the lug 29 or with the lug 29 of another spring adapter 28 at the end of the partial spring 31, which end faces away from the spring adapter 28.

(12) The additional spring adapter 28 is arranged rotatably on the hollow shaft 30 and is connected with its connection piece 33 in a manner adapted to rotate in unison with another hollow shaft 30. Another spring 31 encloses the additional hollow shaft 30 and is connected with one of its hooks 32 to the lug 29 of the additional spring adapter 28.

(13) A shaft adapter 34, which has, facing the additional spring 31, a connection piece 35, is arranged at the end of the additional spring 31, which end faces away from the additional spring adapter 28. The connection piece 35 likewise has lugs 29. The hook 32 facing away from the additional spring adapter 28 is fastened at the lug 29 of the connection piece 35. The shaft adapter 34 is arranged rotatably on the hollow shaft 30 and on the grooved shaft 17.

(14) FIG. 2 shows a perspective view of the grooved shaft 17 of the roller blind 10 according to FIG. 1.

(15) FIG. 3 shows a cut-away partial view of the driving head 11 of the roller blind 10 according to FIG. 1. As can be seen in the figure, the grooved shaft 17 is secured against pulling out by means of a snap ring 36 in the mount 23.

(16) FIG. 4 shows a perspective view of the carrier 25 of the roller blind 10 according to FIG. 1. As can be seen in the figure, a projection is provided in the interior of the first section 26 for interacting with the groove 18 of the grooved shaft 17. The carrier 25 is thus mounted in a manner adapted to rotate in unison on the grooved shaft 17. As can also be seen in the figure, a plurality of ribs 38 are arranged on the outer circumference of the second section. The ribs 38 are used to connect the carrier in a manner adapted to rotate in unison with a spring adapter 28.

(17) The manner of functioning of the roller blind 10 will be explained below on the basis of FIGS. 1 through 4. The desired number of partial springs 31 can be combined by means of the spring adapters 28 to form a spring assembly, an assembled spring. The winding shaft, not shown in the figures, is connected in a manner adapted to rotate in unison with the shaft carrier 14, with the nut 16 and with the shaft adapter 34 in the assembled state. When unwinding the curtain, the spring composed of the partial springs 31 is tensioned. The partial springs 31 are selected to be such that the weight of the curtain and optionally the weight of an additional lower curtain weight are more or less compensated by the spring force in each unwound position. At the same time, the nut 16 turns along the thread of the threaded section 15, to the right in FIG. 1, during the unwinding of the curtain. When the curtain is pushed up, the nut 16 rotates back on the thread of the threaded section 15, to the left in FIG. 1, until the nut 16 strikes the end of the threaded section 15 when reaching the upper end position of the curtain.

(18) To pretension the partial springs, the hexagon socket 22 of the secondary drive 19 can be actuated with an Allen wrench. The ramps 20 are now locked with the ramps 21. Four locking steps are provided per revolution in the exemplary embodiment shown. While the ramps slide along one another, the secondary drive can yield to the right against the action of the spring 24 in FIG. 1 until it snaps back when reaching the next locked position.

(19) FIG. 5 shows a spring assembly of another exemplary embodiment with the features of the present invention. While the partial springs 31 are connected in series in the exemplary embodiment according to FIG. 1, FIG. 5 shows a parallel connection of the partial springs 31. A carrier 25 is arranged for this purpose after the shaft adapter 34, which is on the left in FIG. 5. The carrier 25 is connected rotatably to the shaft adapter 34 but in a manner adapted to rotate in unison with the grooved shaft 17. The projection 37 interacts to this end with the groove 18. When unwinding the curtain from the winding shaft, the two partial springs 31 shown are tensioned each individually between the shaft adapter 34 and the respective corresponding spring adapter 28.

(20) While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.

LIST OF REFERENCE NUMBERS

(21) TABLE-US-00001 10 Roller blind 11 Driving head 12 Output 13 Fastening piece 14 Shaft carrier 15 Threaded section 16 Nut 17 Grooved shaft 18 Longitudinal groove 19 Secondary drive 20 Ramp 21 Ramp 22 Hexagon socket 24 Spring 25 Carrier 26 First section 27 Second section 28 Spring adapter 29 Lug 30 Hollow shaft 31 Partial spring 32 Hook 33 Connection piece 34 Shaft adapter 35 Connection piece 36 Snap ring 37 Projection 38 Rib