CZ309968B6 - A shutter consisting of a frame with control device to position the slats - Google Patents

Abstract

The shutter (33) consisting of a frame (32) with the control device to position the slats (21) with two guide rails (2) for slats (21) of the shutter (33) provided with an outer chain groove (9) and a centre cam groove (10). In the cam groove (10) there is a control arm (4) provided at its ends (4) with at least one opening (22) for a pin (16) which at the same time connects the chain links (17, 18), whereas a slat (21) of the shutter (33) is attached to the control arm (4) and there are side grooves (11) coming from the cam groove (10) in the regular intervals perpendicular to it and under the cam groove (10) there are two flexible leaves (7, 8) arranged against each other, the thrust arms (30, 30´) of the flexible leaves (7, 8) are pretensioned towards the lower surface of the cam groove (10). The cam (12) is provided with two wedge segments (19) and one right-angled full segment (20), and at the edge of each guide rail (2) there is a drive screw (5).

Description

Front window blind consisting of a frame with a control device for setting the position of the slats

Field of technology

The invention relates to the guidance of front window slats of blinds, mounted especially on slanted windows, with a control device for setting their position, i.e. displacement and rotation.

Current state of the art

Two systems are basically used for the construction systems of the front window slats of blinds. In both systems, frames with grooves for guiding the edge pins of the blinds are usually arranged on both sides of the lowered blinds. The first system, the so-called blinds, consists in the fact that a storage box is arranged in the upper part of the frame, in which the individual slats of the blinds are wound, which are connected to each other and are lowered or pulled out in the grooves of the mentioned side frames. The disadvantage of this system is that the slats cannot be individually positioned, so they are either pulled down, either for complete shading at night or for safety reasons, or partially extended to let in some light, or rolled up in a storage box, when the interest is for the window to be uncovered. Such a system is described, for example, in PV 1993-636 A1.

In the second system, rails are arranged on the sides of the window opening only for guiding the edge pins of the blinds, the blinds are finished at the bottom with a massive bar, in which the lowering or lifting belts that pass through the individual slats of the blinds, and which are wound up in the upper part of the assembly on winding wheels arranged in the upper part of the assembly.

At the same time, the slats of the blinds are connected via rope ladders, which can also be controlled and which can tilt the slats. The disadvantage of this system is the relatively low stiffness, which can threaten the compactness of the assembly in case of strong wind. Furthermore, the fact that this system works on the principle of gravity and therefore cannot be used for slanted windows. The blind slat assembly can be brought into the stacking position in the upper part of the window by pulling on the lower bar. Such a system is described, for example, in EP 2669462 A1, AT 007694 U1, AT 501293 B1 or DE 29913131 U1.

The aim of the invention is to present a front window blind consisting of a frame with a control device for setting the position of the slats, i.e. a system for moving and at the same time turning the slats, while this system would represent a compact structure reliably resistant to adverse weather conditions, and which would at the same time enable suitable shading of buildings and be would be able to reduce the temperature inside without additional air conditioners.

The essence of the invention

The aforementioned shortcomings are eliminated by the front window blind consisting of a frame with a control device for setting the position of the slats according to the invention, the essence of which is that there are two grooves, designed as an extreme chain groove and a central cam groove, while under these grooves there is space for the chain links in the chain groove and for the cam of the control arm the position of the louvre slats in the cam groove, the control arm being placed in the cam groove over the cam pin, the control arm having the shape of the letter V and consisting of two fingers located above the guide rails, the control arm being provided at its ends with at least one hole for a pin, which also connects the chain links, while a louver lamella is fixed to the control arm and side grooves perpendicular to it extend from the cam groove at regular intervals, and under the cam groove, opposite the side grooves, two flexible plates are arranged facing each other, which are fixed with their fastening parts in the base of the guide rail, the pressure arms of the plates are biased towards the lower surface of the cam groove and are oriented by their stops

- 1 CZ 309968 B6 against each other, while the cam is equipped with two wedge sections, the thickness of which decreases from the upper to the lower surface of the cam, and one rectangular solid section covering the entire thickness of the cam, while the wedge sections are oriented against the fingers of the control arm and on the edge of each of the bar is arranged with a drive worm for engagement with the connecting pin of the chain links and the control arm.

In a preferred embodiment, the control arm of the blind slat is arranged in such a way that a carrier on which the slat is fixed is arranged on a pin placed in the chain links and in one arm hole and on a supporting pin in the other arm hole.

In another advantageous embodiment, the control arms are provided with recesses on the edges of their fingers to enable a tight fit of the arms when the blind slats are in the stacked position.

Clarification of drawings

The invention will be clarified with the help of drawings, in which Fig. 1 shows a front window blind according to the invention, when all the slats of the blind are stacked in the basic position, in Fig. 2 there is a detail of the internal arrangement of the control device from Fig. 1, Fig. 3 is a view of lowering the slats louver in the initial stage, Fig. 4 is a view of the launch in an advanced stage, Fig. 5 is a view of the louver slats in the final stage of launch, when the louver slats are in the maximum open position, Fig. 6 is a view of the louver slats in the final stage of launch , but the louver slats are in the half-open position, Fig. 7 is a detail of the control arm of the louver slat, Fig. 8 is a detail of the arm cam from Fig. 7, Fig. 9 is a schematic section of the frame along line A-A from Fig. 1 with device elements, Fig. Fig. 10 is a chain and control arm assembly corresponding to the arrangement in Fig. 9, Fig. 11 represents the situation when all the louver slats in the horizontal position are lowered to the fully shading position, Fig. 12 represents the situation when all the louver slats are pulled out in the vertical position to the fully stowed position, Figs. 13 to 18 show the individual phases of controlling the position of the slats of the arms from Figs. 7 and 8.

An example of the implementation of the invention

Front window blind 33 with frame 32 is used for sloping roof windows. In Fig. 1, the basic frame 32 for guiding the front window slats 21 of the blind 33 is controlled by the control device 1 for their displacement and rotation. All slats 21 of blind 33 are stacked here in a packet in the upper basic position. The basic elements of the device are arranged in two vertical parallel mirror-symmetric guide rails 2, each of which is provided with a central cam groove 10 and an extreme chain groove 9, which is closer to the window in the assembled state. The control arm 4 of the slats 21 of the shutter 33 is partially visible, and perpendicular side grooves 11 extend from the cam groove 10 at regular intervals.

In Fig. 2, it can be seen in detail that each slat 21 of the blind 33 has a carrier 6 on both sides, which is fixed on the control arm 4. Furthermore, the links of the chain 3 in the stacked position and also the control arms 4 in the stacked position can be seen here. On the edge of each of the guide rails 2, a screw 5 is arranged, driven via the distribution shaft and the bevel gearbox of the motor. You can also see the flexible plates 7, 8, the function of which will be discussed later. This motor 29 of the screw 5 can be seen in Fig. 3 and is located under the transverse connecting beam. The connecting pins 16 protrude from the chain 3 and the screw 5 always catches one and thus always moves one downward when the slats 21 of the blind 33 are moved down, and conversely, in the opposite direction of rotation, it pulls the chain 3 with the slats 21 of the blind 33 upwards through these connecting pins 16.

Fig. 3 shows the stacked slats 21 of the blind 33 and the assembly of slats 21 of the blind 33 in a state where, thanks to the control device 1, the first slat 21 of the blind 33 is turned to a completely shading position, i.e. perpendicular to the stacking position. The mechanism for lowering and turning the slats 21 of the blind 33 will be described in detail later. The carrier 6 is also clearly visible here, on which the lamella 21 of the blind 33 a is fixed

- 2 CZ 309968 B6 this carrier 6 is arranged on the arm 4 via the connecting pin 16 of the chain and the support pin 14. This can be clearly seen in Fig. 10. The slat 21 of the blind 33 can be fixed directly on the arm 4 or preferably the slat 21 of the blind 33 arranged in such a way that a carrier 6 is arranged on the connecting pin 16 placed in the chain links 17, 18 and in one shoulder opening 22 and on the supporting pin 14 in the other shoulder opening 22, on which the slat 21 of the blind 33 is fixed.

Fig. 4 shows the situation in the phase of lowering the slats 21 of the blinds 33, when several slats 21 of the blinds 33 are lowered into the completely shading position. Here you can see both the chain groove 9 and the cam groove 10, as well as the side grooves 11 connected to it at regular intervals. The arms 4 move in the grooves 10, 11, on which the carriers 6 slats 21 of the blinds 33 are arranged. When all the stacked the slats 21 of the blinds 33 move to the fully shading position, the shading will be completed in such a way that all the slats 21 of the blinds 33 are in this completely shading vertical position.

This can be clearly seen in Fig. 5, where all slats 21 of the shutter 33 are already lowered in the final phase of lowering. Before the lowering position shown here, all the slats 21 of the blind 33 were in the fully shading position. Here is already shown their introduction to the maximum open position, when the most light is transmitted. How this change in position is achieved will be explained again later.

In Fig. 6 it can be seen that the slats 21 of the blind 33 can be brought to any partially open position within 90°, when the slats 21 of the blind 33 are slanted and partially shaded.

Fig. 7 shows a detail of the control arm 4. This serves to fix the carrier 6 for the slat 21 of the blind 33 and to connect it to the chain 3, which also ensures the rotation of the slat 21 of the blind 33. The control arm 4 is basically V-shaped consisting of two fingers 31 and at its ends, the control arm 4 is provided with chain holes 15 for pins 14, 16 and recesses 23. The recess 23 is used so that the stacked control arms 4 can fit tightly together in the stacked position of the blind 33. In the break, the control arm 4 is provided cam 12 mounted on pin 13.

In Fig. 8, it can be seen in detail that the cam 12 is cylindrical and its upper front surface is provided with two wedge sections 19 and one rectangular full section 20 covering the entire thickness of the cam 12. The wedge sections 19 slope in thickness from the upper surface to lower surface, thereby creating a sharp approach wedge.

Fig. 9 shows a schematic section of the guide bar 2 according to the line A-A from Fig. 1. The guide bar 2 consists of a base 27 and a cover 28. In the chain groove 9 of the guide bar 2, a chain 3 is guided, which consists of basic guide chain links 17, which connect the connecting chain links 18 arranged above them. Pins 16 are guided through the chain holes 15 of the chain links. The control arm 4 is mounted on the connecting pin 16 with one of its arm holes 22 and the pin 13 of the cam 12 moves in the cam groove 10. In the base 27 of the guide rail 2 is a storage slot 26 for the fastening parts 24 of the flexible plates 7, 8, mentioned in Fig. 2.

Giant. 10 is an assembly of two links of the chain 3 and the control arm 4 corresponding to the spatial arrangement of Fig. 9. The chain 3 consists of guide chain links 17 and connecting chain links 18, while the connecting chain link 18 is closer to the control arm 4. In the chain holes 15 and in one of the shoulder holes 22 is a pin 16, which both connects the chain links 17, 18 and at the same time the carrier 6 of the lamella 21 of the blind 33 is placed on it at one end. In the other shoulder hole 22, a supporting pin 14 is also arranged for the other end of the carrier 6.

As can already be seen in Fig. 7 and 8, the wedge sections 19 are oriented against the fingers 31 of the control arm 4. This is very important to explain why the cams 12 do not interfere when the slats 21 of the blind 33 are lowered into the shading position or, conversely, when the slats 21 are pulled out blinds 33 to the stowed position. If the cams 12 were not equipped with these wedge sections 19, the cam would indeed lift one of the flexible plates 7, 8 and move, but the following flexible plate, or its stop 25 pressed from below on the cam groove 10, the cam 12 and the slat 21 of the blind 33 would not be able to continue moving in a straight line. This is explained with reference to Figs. 11 and 12, where Figs

- 3 CZ 309968 B6 represents a situation where all slats of the blind 33 are lowered into a completely shading position in a horizontal position. When lowered in the direction of the arrow, the cam 12 of the control arm 4 is oriented in such a way that it has a wedge section 19 oriented downwards in the indicated direction of movement. The upper elastic plate 8 was easily moved by the cam 12, because its arm 30' is lifted from the cam groove 10 and the pressure arm 30 of the lower plate 7 is lifted precisely thanks to this wedge section 19. This situation is the same for all the cams 12 of the other slats 21 of the blind 33, and that's why they all easily descend into a completely shadowing position.

Giant. 12, in turn, represents a situation where all slats 21 of the blind 33 are pulled out in a vertical position to a completely stacked position. When pulled out in the direction of the arrow, the cam 12 of the control arm 4 is oriented in such a way that it has a wedge section 19 oriented upwards in the indicated direction of movement. The lower elastic plate 7, the cam 12 moved easily, because its pressure arm 30 is lifted from the cam groove 10 and the pressure arm 30' of the upper elastic plate 8 is lifted thanks to this wedge section 19. This situation is the same for all the cams 12 of the other slats 21 of the blinds 33, and therefore all of them, easily slide out into the fully stowed position.

Giant. 13 to 18 show the individual phases of controlling the slats 21 of the blind 33. This detailed description follows on from Figs. 1 to 6, with the fact that we start from the situation in Fig. 4. Originally stacked in the upper part of the frame 32, the slats 21 of the blind 33 are flipping from a horizontal to a vertical position thanks to the screw 5 starts thanks to the pull of the chain 3 and they all go down.

How the slats 21 of the blind 33 are turned from a vertical to a horizontal position will be explained on the basis of an analogous movement in the opposite setting from a vertical to a horizontal position, as shown in Fig. 5 and 6, when the slats 21 of the blind 33 can be turned between these extreme positions , thereby regulating the transmission of light.

The most important components of the control device 1 are the control arms 4 with cams 12, when the cam 12 moves with its pin 13 in the cam groove 10, under the surface of the guide rail 2. In the base 27 of the guide rail 2, the fastening parts 24 of flexible plates 7, 8, and those with their pressure arms 30, 30' flexibly rest on the cam groove 10 from below and are centered with respect to it. The pressure arms 30, 30' of the flexible plates 7, 8 are terminated by stops 25, which protrude from the guide rail 2 and have the same orientation as the fastening parts 24 of the flexible plates 7, 8. The basis of the mechanism for controlling the rotation of the slats 21 of the blind 33 is the interaction between the cam 12 , respectively its shaped parts, such as wedge section 19 and solid section 20, and flexible plates 7, 8 or by their stops 25.

As indicated in connection with Fig. 8, the cam 12 is cylindrical and its upper front surface is provided with two wedge sections 19 and one rectangular solid section 20 covering the entire thickness of the cam 12. The wedge sections 19 slope in thickness from the upper surface to lower surface, thereby creating a sharp approach wedge.

Thus, if the cam 12 comes into contact with the flexible plates 7, 8 with its wedge section 19, then thanks to this wedge, the pressure arm 30 of the flexible plate 7 with the stop 25 is easily raised, the cam 12 drives it and continues to move without being forced to turn, and thus turn the entire control arm 4, and thus also the carrier 6, and thus also the lamella 21 itself. During this movement, one of the flexible plates 7, 8 moves up very easily, because the pressure arm 30 of the lower flexible plate 7 is at an angle and therefore, the beveling of the wedge section 19 is not so important, but the second plate 8, which rests with its stop 25 on the surface of the cam groove 10, must be actively raised and lowered by this wedge. And it is in this way that the individual slats 21 of the blind 33 are allowed to slide down one after the other into the basic shaded position without changing their vertical orientation. The situation described above is shown in Fig. 13, at the moment when, when moving from above, the cam 12 easily gripped the upper elastic plate 8, and then picked up the lower elastic plate 7 and gripped it.

However, if the cam 12 comes into contact with the flexible plates 7, 8 with its full section 20, the first plate 7 will easily lift up, since the pressure arm 30 of the flexible plate 7 is at an angle,

- 4 CZ 309968 B6 and therefore the thickness of the solid section 20 does not matter in the lifting, but with the second plate 8, which rests with its stop 25 on the surface of the cam groove 10, the solid section 20 hits this stop 25 and cannot continue moving. This can be seen in Fig. 14.

As can be seen in Fig. 15, as a result of the continued pull of the chain 3, the cam 12 is forced to engage completely in the side groove 11, which is at the level between the stops 25 of the flexible plates 7, 8. And since the control arm 4 is connected at one end to by the chain 3, the control arm 4 rotates, and thus the carrier 6 of the slats 21 of the blind 33, as well as the slats 21 of the blind 33 itself. The side groove 11 is not visible here, because it is completely shaded by the control arm 4. At the slats 21 of the blind 33, there is to a partial transformation from a vertical position to an oblique one, as seen in the partial rotation in Fig. 6.

Fig. 16 shows the next phase of completing the rotation of the slat 21 of the blind 33 to the horizontal position, when, during the continued rotation of the control arm 4, the cam 12, or its pin 13 gets out of the side groove 11 again.

Fig. 17 shows the situation when, during the further movement of the chain 3, the cam 12, together with the entire control arm 4 and together with the lamella 21 of the shutter 33, continues to rotate and, after completely leaving the side groove 11, reaches the lamella 21 of the shutter 33 back into the cam groove 10 full horizontal positions. The cam 12, which has already left the side groove 11 and turned over, is now oriented with its wedge cut 19 towards the stop 25 of the upper flexible plate 8, as can be seen in Fig. 17.

In Fig. 18, it can be seen that turning the cam 12 with its wedge cut 19 easily lifts the stop 25 of the upper flexible plate 8, and the cam 12 drives this upper flexible plate 8 and continues in the cam groove 10 further up, while the slats 21 of the blind 33 are already rotated to horizontal position.

In practice, the above phase-rendered filming will be the most common action when adjusting the position of the lowered slats 21 of the blinds 33, i.e. in the basic position of the vertically rotated slats 21 of the blinds 33.

Claims (3)

PATENT CLAIMS 1. A front window blind consisting of a frame with a control device for setting the position of the slats, consisting of two vertical parallel mirror-symmetrical guide rails, where the slats of the blind are arranged between them, each of the slats being provided with grooves, and pulling means are stored in the grooves, characterized by , that there are two grooves, made as an extreme chain groove (9) and a central cam groove (10), while under these grooves (9, 10) there is space for the chain links (3) in the chain groove (9) and for the cam (12) ) of the control arm (4) position of the slats (21) of the blind (33) in the cam groove (10), while in the cam groove (10) the control arm (4) is placed over the pin (13) of the cam (12), while the control arm ( 4) has the shape of the letter V and consists of two fingers (31) located above the guide rails (2), while at its ends the control arm (4) is provided with at least one shoulder hole (22) for the connecting pin (16), which also connects chain links (17, 18), while the lamella (21) of the shutter (33) is fixed to the control arm (4) and side grooves (11) perpendicular to it extend from the cam groove (10) at regular intervals and below the cam groove (10) opposite the side grooves (11), two flexible plates (7, 8) are arranged opposite each other, which are fixed by their fixing parts (24) in the base (27) of the guide rail (2), the pressure arms (30, 30') of the flexible plates ( 7, 8) are biased towards the lower surface of the cam groove (10) and are oriented with their stops (25) against each other, while the cam (12) is provided with two wedge-shaped cutouts (19), the thickness of which increases from the upper to the lower surface of the cam ( 12) reduces and one rectangular full section (20) of the entire thickness of the cam (12), while the wedge sections (19) are oriented against the fingers (31) of the control arm (4) and a drive worm is arranged on the edge of each of the bars (2) (5) for engagement with the connecting pin (16) of the chain links (17, 18) and the control arm (4). 2. Front window blind according to claim 1, characterized in that on the control arm (4) the slat (21) of the blind (33) is arranged in such a way that on the pin (16) placed in the chain links (17, 18) and in one arm hole (22) and on the support pin (14) in the second hole (22) of the control arm (4), a carrier (6) is arranged, on which the slat (21) of the blind (33) is fixed. 3. Front window blinds according to claim 1 or 2, characterized in that the control arms (4) are provided with recesses (23) on the edges of their fingers (31) to allow a tight fit of the control arms (4) when the slats (21) of the blind are (33) in the stowed position.