SYSTEM FOR CLOSING A VENETIAN BLIND OR THE LIKE HOUSED IN A DOUBLE GLAZING OR IN A DOUBLE GLASS, PROVIDED WITH MEANS FOR PREVENTING A MOVEMENT OF THE BLIND DURING THE TRANSPORT OR ASSEMBLY OF THE SYSTEM

Abstract

The invention refers to a system comprising a Venetian blind or the like housed within a double glazing or a double glass. The blind comprises a multiplicity of slats movable by means of a shaft rotatable around a longitudinal axis thereof and housed in a rolling-shutter box of the double glazing. The closure system comprises means for rotating the shaft around the longitudinal axis thereof. The rotation means are housed in a lateral profile of the double glazing and are commanded by a slider translatable between an upper end stop, at which the blind is completely raised, and a lower end stop, at which the blind is completely lowered. The closure system further comprises a first mechanism which prevents a movement of the blind until, during the transport or assembly of the closure system, the rolling-shutter box is disconnected from the lateral profile. The first blocking mechanism comprises three pins that can be rotated, together with the shaft, around the longitudinal axis thereof, and that can be translated between a first position at which the three pins are housed in three respective seats obtained in the cap of the rolling-shutter box, and a second position in which the three pins lie outside said seats. While the rolling-shutter box is disconnected from the lateral profile, the three pins are housed in the respective seats so as to prevent a rotation of the shaft for moving the slats. The closure system also comprises three counter-pins integrally connected to the lateral profile and arranged in a manner so as to push the three pins outside the respective seats upon connection of the rolling-shutter box to the lateral profile, so as to allow a rotation of the shaft for moving the slats. The closure system finally comprises a second mechanism for blocking the slider when the latter is situated at the upper end stop, i.e. when the blind is completely raised.

Claims

1. A system (1) for opening and closing a communication path between two separate environments, said system comprising: separation means (2, 7) respectively suitable for allowing and preventing, at least partially, the traversing of said path by light, air, or sound waves; a group (12, 15, 20, 22) for moving said separation means (2, 7) between at least one first open position and one second closed position of said path; said movement group (12, 15, 20, 22) comprising: a shaft (15) rotatable around an axis and connected to said separation means (2, 7), said connection causing the movement of said separation means (2, 7); means (12, 20, 22) for rotating said shaft (15) around said axis, means (18, 19) for commanding said rotation means (12, 15, 20, 22); a rolling-shutter box (16) for containing said shaft (15); a lateral profile (17) for containing said rotation (12, 20, 22) and command (18, 19) means, said rolling-shutter box (16) and said lateral profile (17) being mutually connectable, said shaft (15) and said rotation means (12, 20, 22) being mutually connected when said rolling-shutter box (16) and said lateral profile (17) are mutually connected, said system (1) being characterized in that it comprises means for blocking the rotation of said shaft (15) when said shaft (15) is not connected with said rotation means (12, 20, 22), said blocking means comprising: at least one first pin (25, 26, 27) that is axially slidable with respect to said shaft (15) but constrained in rotation with said shaft (15); a first seat (28, 29, 30) for housing said first pin (25, 26, 27) integrally connected with said rolling-shutter box (16), said first pin (25, 26, 27) being movable between at least one third position at which said first pin (25, 26, 27) is at least partially housed in said first seat (28, 29, 30), and a fourth position at which said first pin (25, 26, 27) is outside said first seat (28, 29, 30), said first pin (25, 26, 27) being in the third position when said rolling-shutter box (16) and said lateral profile (17) are mutually disconnected.

2. System (1) according to claim 1, characterized in that it comprises: means for maintaining said first pin (25, 26, 27) in the third position; means (33, 34) for guiding said first pin (25, 26, 27) between the third position and the fourth position, said guide means (33, 34) being connected to said shaft (15); means (35, 36, 37) for ejecting said first pin (25, 26, 27) from said first seat (28, 29, 30), said ejection means (35, 36, 37) being connected to said lateral profile (17).

3. System (1) according to claim 2, characterized in that said maintenance means comprise at least one first plate (31) integrally connected with said rolling-shutter box (16) and including at least one first through hole (28, 29, 30) acting as said first seat (28, 29, 30), said first pin (25, 26, 27) being at least partially housed in said first hole (28, 29, 30) when said first pin (25, 26, 27) is in the third position, said ejection means (35, 36, 37) comprising at least one second pin (35, 36, 37) integrally connected with said lateral profile (17), said second pin (35, 36, 37) being at least partially housable in said first hole (28, 29, 30), said first hole (28, 29, 30) being penetratable by said first pin (25, 26, 27) and by said second pin (35, 36, 37) respectively on opposite sides with respect to a plane on which said first plate (31) lies, said second pin (35, 36, 37) being housed in said first hole (28, 29, 30) when said rolling-shutter box (16) and said lateral profile (17) are mutually connected.

4. System (1) according to claim 3, characterized in that said maintenance means comprise the friction between said first pin (25, 26, 27) and the wall of said first hole (28, 29, 30) in which said first pin (25, 26, 27) is fitted when said first pin (25, 26, 27) is in the third position.

5. System according to claim 2, characterized in that said maintenance means comprise elastic means suitable for maintaining said first pin (25, 26, 27) in the third position.

6. System (1) according to claim 2, characterized in that said guide means (33, 34) act as means for connecting said first pin (25, 26, 27) to said shaft (15), guide means (33, 34) being suitable for allowing a translation of said first pin (25, 26, 27) parallel to a rotation axis of said shaft (15), guide means (33, 34) being suitable for blocking the rotation of said first pin (25, 26, 27) around said rotation axis.

7. System (1) according to claim 3, characterized in that said guide means (33, 34) include at least one circular crown acting as first means for blocking said first pin (25, 26, 27) in the fourth position when said rolling-shutter box (16) and said lateral profile (17) are mutually connected, said circular crown having a symmetry axis orthogonal to said first plate (31) and coinciding with said rotation axis of said shaft (15).

8. System (1) according to claim 2, characterized in that said guide means (33, 34) comprise at least one second plate (33) including at least one second through hole (34), said shaft (15) traversing said second plate (33) at said second hole (34), said second plate (33) being translatable on said shaft (15), said first pin (25, 26, 27) being integrally connected to said second plate (33).

9. System (1) according to claim 8, characterized in that said second plate (33) is shaped like said circular crown and has, at said second hole (34), a pair of teeth (44), housed in respective grooves (45) that longitudinally run along said shaft (15).

10. System (1) according to claim 1, characterized in that said rotation means (12, 20, 22) comprise a third pin (20) coaxial with said shaft (15), said shaft (15) comprising a second seat (21) for housing said third pin (20), the housing of said third pin (20) in said second seat (21) connecting said shaft (15) to said rotation means (12, 20, 22), the connection of said rolling-shutter box (16) to said lateral profile (17) causing the housing of said third pin (20) in said second seat (21).

11. System (1) according to claim 1, characterized in that said command means (18, 19) are movable between at least one fifth position at which, when said shaft (15) and said rotation means (12, 20, 22) are mutually connected, said separation means (2, 7) are in the first position, and a sixth position at which, when said shaft (15) and said rotation means (12, 20, 22) are mutually connected, said separation means (2, 7) are in the second position, said command means (18, 19) in said second position being blocked in such position by means of second blocking means (41, 42, 43).

12. System (1) according to claim 11, characterized in that said command means (18, 19) comprise a slider (18) translatable between the fifth position and the sixth position, said second blocking means (41, 42, 43) comprising: at least one first stop tooth (42) integrally connected with a first tongue (41) that is elastically deformable and integrally connected to said slider (18); a third seat (43) for housing said first tooth (42), said first tooth (42) being housed in the third seat when said slider (18) is in the sixth position.

13. System according to claim 11, characterized in that it comprises third means for blocking said command means (18) in said fifth position.

14. System according to claim 13, characterized in that said third blocking means comprise: a fourth seat for housing said first tooth (42), said first tooth (42) being housed in said fourth seat when said slider (18) is in the fifth position.

15. System according to claim 13, characterized in that said third blocking means comprise: at least one second stop tooth integrally connected to a second tongue that is elastically deformable and integrally connected to said slider (18); a fifth seat for housing said second tooth, said second tooth being housed in the fifth seat when said slider is in the fifth position.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0077] Further objects and advantages of the present invention will be clearer from the following detailed description of an embodiment thereof and from the enclosed drawings, given as a merely non-limiting example, in which:

[0078] FIG. 1 shows, in perspective view, a closure system comprising a Venetian blind housed in a double glazing, according to the present invention;

[0079] FIG. 2 shows several components of the closure system of FIG. 1, in exploded perspective view;

[0080] FIG. 3 shows several components of a group for moving the blind of the system of FIG. 1, in schematic, partial cross section;

[0081] FIG. 4 shows, in perspective view, a detail of a rolling-shutter box of the closure system of FIG. 1, in an instant in which the rolling-shutter box and a lateral profile of the system of FIG. 1 are disconnected from each other;

[0082] FIG. 5 shows, in perspective view, the detail of FIG. 4 lacking a wall of the rolling-shutter box;

[0083] FIG. 6 shows, in top perspective view, the rolling-shutter box and the lateral profile of the closure system of FIG. 1 in an instant that precedes the mutual assembly thereof;

[0084] FIG. 7 shows, in top perspective view, the rolling-shutter box and the lateral profile of the closure system of FIG. 1 assembled to each other;

[0085] FIG. 8 shows, in perspective view, the detail of FIG. 4 in an instant in which the rolling-shutter box and the lateral profile are assembled together;

[0086] FIG. 9 shows, in schematic cross section, a detail of a slider for commanding the movement of the blind of the system of FIG. 1.

DETAILED DESCRIPTION OF SEVERAL PREFERRED EMBODIMENTS OF THE INVENTION

[0087] In the present description, in order to facilitate the exposition, reference is only made to a preferred embodiment of the invention, in which the closure system, subject of the invention, comprises a Venetian blind housed within a double glazing. It must be clear that the invention is not limited to the aforesaid embodiment but can be applied to any closure system whose movement group comprises: [0088] a member rotatable around an axis and connected to the separation means in a manner such that a rotation of the member rotatable around said axis causes a movement of the separation means, and [0089] means for rotating of the member rotatable around said axis.

[0090] By way of example, the separation means, in addition to a Venetian blind, can be a pleated blind or a shutter blind. They can also be a movable screen comprised between two glass panes forming a wall.

[0091] Hereinbelow in the present description, a figure can be illustrated also with reference to elements not expressly indicated in that figure but in other figures. The scale and proportions of the various depicted elements do not necessarily correspond to the actual scale and proportions.

[0092] FIG. 1 shows a closure system 1 comprising a Venetian blind 2 housed in a structure 3 known as a double glazing. The double glazing 3 comprises two glass panes 4 and 5 preferably mutually parallel and sustained by a frame 6 partially interposed thereto. By way of example, the glass panes 4 and 5 are vertically arranged and the frame 6 is metallic. Incidentally, the latter can also be made of other materials, for example plastic or rubber materials. The glass panes 4 and 5 delimit, together with the frame 6, a parallelepiped chamber within which the blind 2 is housed. The latter comprises a multiplicity of elements 7 extended lengthwise, mutually parallel and indicated hereinbelow in the present description with the expression slats. The slats 7 are arranged, by way of example, horizontally and are movable with respect to the double glazing 3. In particular, the closure system 1 comprises a movement group by means of which it is possible to impart to the slats 7 both a translational motion parallel to the glass panes 4 and 5 (due to which one obtains what is usually indicated as lowering or raising of the blind 2), and a rotary motion around a respective longitudinal axis (due to which the orientation of the slats 7 with respect to the double glazing 3 is modified).

[0093] The movement group comprises a shaft 15 (visible in FIG. 4) preferably arranged parallel to the slats 7 and rotatable around a longitudinal axis thereof. The shaft 15 is housed in a first containment structure 16 (visible in FIG. 2) placed at an upper portion of the closure system 1. The containment structure 16 will be indicated hereinbelow in the present description with the expression rolling-shutter box. The shaft 15 is connected to the slats 7 in a manner such that a rotation of the shaft 15 causes a translation and/or a rotation of the slats 7.

[0094] The translation of the slats 7 occurs by means of a pair of cords 8 and 9 arranged vertically, by way of example, and each of which transversely crosses the slats 7 at a respective hole. The slats 7 thus comprise two vertical sequences of holes, each of which crossed by one of the two cords 8 and 9. The latter are integrally connected, at a first end, with the shaft 15, and at a second end opposite the first end, with the slat which, in the group of slats 7, is placed at the lowest elevation in the figures. This slat will be indicated hereinbelow in the present description with the reference number 7a and will be termed bottomslat. The rotation of the shaft 15 around the longitudinal axis thereof causes a winding or unwinding of the cords 8 and 9 around the shaft 15 and consequently a raising or a lowering of the blind 2.

[0095] The rotation of the slats 7 occurs by means of two cords 10 and 11 arranged vertically, by way of example. Each cord 10 and 11 is bent like a U and is partially wound, at the base of the U, around a respective pulley fit coaxial with the shaft 15 and freely rotating with respect thereto. Each cord 10 and 11 is connected, transversely and at each arm of the U, to the slats 7 along a respective longitudinal edge thereof. Hereinbelow in the present description, the cords 10 and 11 will be indicated with the expression ladder-like cords. A rotation of the pulleys around the longitudinal axis thereof consequently causes a translation of the ladder-like cords 10 and 11. Thus, each slat 7 rotates around the longitudinal axis thereof. The amplitude of the rotation, with respect to the horizontal position, is preferably comprised between +70 and 70.

[0096] A rotation of the shaft 15 around the longitudinal axis thereof can initially cause a rotation of the slats 7 but will subsequently only cause the translation thereof. Given that the cords 8 and 9, the ladder-like cords 10 and 11, and the connection of these to the shaft 15 are substantially known, further details are not provided thereon hereinbelow.

[0097] The movement group of the closure system 1 further comprises a mechanism connected to the shaft 15 in a manner such that the actuation of said mechanism causes a rotation of the shaft 15 around the longitudinal axis thereof. The rotation mechanism of the shaft 15 is housed in a second containment structure 17 placed at a lateral portion of the closure system 1. The containment structure 17 will be indicated hereinbelow in the present description with the expression lateral profile.

[0098] The rotation mechanism of the shaft 15 comprises, by way of example, a belt having two mutually connected ends to form a ring maintained under tension by a pair of coplanar pulleys, around each of which the belt is wound for a section equal to half a circumference. The pulleys are preferably arranged in a manner such that the two belt sections that join the same are vertically arranged. The pulleys have a groove whose width is slightly less than the width of the belt wound around the same, and the tension at which the belt is maintained is such to force the latter within the groove. This ensures that the belt is integrally connected to the pulleys at the section where the belt is in contact therewith. By applying a force at one of the two belt sections that join the pulleys, a torque is generated that tends to rotate the pulleys. Such torque is transmitted to the shaft 15 by means of a system of gears 12 (visible in FIG. 3) so as to cause a rotation of the shaft 15 around the longitudinal axis thereof and consequently a rotation and translation of the slats 7. Incidentally, in the abovementioned rotation mechanism of the shaft 15, as an alternative to the belt it is possible to employ another flexible member extended lengthwise, such as a cord or a chain. In the latter case, the pulleys are toothed wheels.

[0099] Given that the rotation mechanism of the shaft 15 is substantially known, further details are not provided hereinbelow.

[0100] The closure system 1 further comprises a slider 18 with nearly parallelepiped shape, by way of example, and placed outside the double glazing 3 and translatable along a guide 19 integrally connected to the glass pane 4 at the lateral profile 17. Preferably, the guide 19 is vertically arranged and the slider 18 is therefore vertically translatable on the lateral profile 17. The slider 18 is magnetically coupled to a slide, within the lateral profile 17, integrally connected to the belt at one of the two belt sections that join the coplanar pulleys of the rotation mechanism of the shaft 15. A translation of the slider 18 on the guide 19 determines a corresponding vertical translation of the slide within the lateral profile 17 (hence a rotation of the belt and with this, as stated above, a rotation of the shaft 15 around the longitudinal axis thereof). A user of the closure system 1, in order to command a translation or a rotation of the slats 7, thus grasps the slider 18 and translates it along the guide 19. In the configuration shown in FIG. 1, the slider 18 is at the lower end stop and the blind 2 is completely lowered.

[0101] FIG. 2 shows the closure system 1 in a partially exploded view where, for the sake of simplicity, the slider 18 and the guide 19 have been omitted. The rolling-shutter box 16 and the lateral profile 17 are mutually disconnected and, due to this disconnection, it is possible to observe a pin 20 (better visible in FIG. 3) orthogonally projecting from the lateral profile 17 towards the rolling-shutter box 16. The pin 20 is connected to the gear system 12 of the rotation mechanism of the shaft 15 (as will be better described with reference to FIG. 3) and is housable in a suitable seat 21 (better visible in FIG. 4) obtained longitudinally in the shaft 15. The rolling-shutter box 16 and the lateral profile 17 are mutually disconnected at a distance such that the pin 20 lies completely outside the seat 21. In the configuration shown in FIG. 2, the blind 2 is completely raised (hence, the slider 18, not illustrated, is at the upper end stop).

[0102] As will be better described hereinbelow, the connection of the rolling-shutter box 16 to the lateral profile 17 during the assembly of the closure system 1 causes the housing of the pin 20 in the seat 21 and, consequently, the connection between the shaft 15 and the rotation mechanism thereof.

[0103] With reference to FIG. 3, it is possible to observe that the pin 20 has a preferably polygonal cross section, and still more preferably square cross section. The pin 20 is integrally connected with a toothed wheel 22 that is part of the gear system 12 actuated by the slider 18 by means of the belt within the lateral profile 17. The pin 20 is preferably arranged with a longitudinal axis thereof coinciding with the rotation axis of the toothed wheel 22. A translation of the slider 18 therefore causes a rotation of the pin 20 around the longitudinal axis thereof. With reference to FIG. 4, it is possible to observe that the seat 21 made in the shaft 15 has a transverse cross section nearly identical to that of the pin 20. In order to connect the lateral profile 17 to the rolling-shutter box 16, it is necessary to make the pin 20 penetrate into the seat 21. When the rolling-shutter box 16 and the lateral profile 17 are mutually connected, the pin 20 is therefore housed in the seat 21. Due to this housing, given that the cross section of the pin 20 is polygonal and that the cross section of the seat 21 nearly identical to that of the pin 20, the shaft 15 becomes rotationally integral with the pin 20. In other words, when the rolling-shutter box 16 and the lateral profile 17 are mutually connected, the pin 20 transmits to the shaft 15 the rotation of the toothed wheel 22. In such a manner, a translational motion of the slider 18 is transmitted to the shaft 15 and then to the slats 7. Incidentally, the pin 20, when housed in the seat 21, is arranged parallel to the shaft 15 and, by way of example, is connected to the latter via fitting.

[0104] With reference once again to FIG. 4, it is possible to observe that the closure system 1 comprises at least one pin, but preferably three pins 25, 26 and 27 housed in three respective seats 28, 29 and 30 obtained by making three respective through holes in a wall 31 acting, by way of example, as a cap of the rolling-shutter box 16 opposite the lateral profile 17 when the closure system 1 is completely assembled. The cap 31 is therefore integral with the rolling-shutter box 16 and is preferably arranged orthogonal to the shaft 15. The cap 31 comprises a further through hole 32 for allowing the access to the seat 21. Preferably, the shaft 15 at least partially crosses the cap 31 at the hole 32. Incidentally, the transmission pin 20 crosses the cap 31 at the hole 32 when the rolling-shutter box 16 and the lateral profile 17 are mutually connected. Preferably, the hole 32 is circular and the seats 28, 29 and 30 are arranged around the hole 32, preferably, at the same distance from the center thereof. The seats 28, 29 and 30 therefore lie on a portion of the cap 31 identifiable as a circular crown whose central hole corresponds with the hole 32. The rotation axis of the shaft 15 coincides with a symmetry axis of said circular crown arranged orthogonal to the cap 31. The pins 25, 26 and 27 are preferably identical to each other and have a square cross section, by way of example. The seats 28, 29 and 30 preferably have a cross section nearly identical to that of the pins 25, 26 and 27 and, in FIG. 4, are respectively arranged on the sides of and below the hole 32 of the cap 31. In the configuration shown in FIG. 4, in which the rolling-shutter box 16 is disconnected from the lateral profile 17, the pins 25, 26 and 27 are connected to the cap 31 via fitting.

[0105] With reference to FIGS. 5 and 6, it is possible to observe that the closure system 1 comprises, within the rolling-shutter box 16, a plate 33 traversed by the shaft 15 at a hole 34 and lying on the side opposite the lateral profile 17 with respect to the cap 31. FIG. 5 differs from FIG. 4 due to the absence of the cap 31, for the purpose of allowing a better observation of the plate 33. Preferably, plate 33 is arranged orthogonal to the shaft 15 and is integrally and orthogonally connected to the pins 25, 26 and 27. The latter are therefore preferably arranged parallel to the shaft 15. The plate 33 is translatable on the shaft 15 but it is rotationally connected thereto. In particular, the plate 33 is, by way of example, shaped as a circular crown and has, at the hole 34, a pair of teeth 44, by way of example diametrically opposed, housed in respective grooves 45 that longitudinally run along the shaft 15. The plate 33 can therefore translate parallel to the rotation axis of the shaft 15 but rotate together with the latter around the longitudinal axis thereof. In the configuration shown in FIGS. 5 and 6, in which the rolling-shutter box 16 is disconnected from the lateral profile 17, the plate 33 is in abutment against the cap 31 and the pins 25, 26 and 27 are fit in the respective seats 28, 29 and 30. In such configuration, the pins 25, 26 and 27 therefore prevent the shaft 15 from rotating around the longitudinal axis thereof. Incidentally, this result can also be obtained if the closure system, subject of the invention, comprises only one of the pins 25, 26 and 27 for preventing the rotation of the shaft 15.

[0106] With reference once again to FIGS. 5 and 6, it is possible to observe that the closure system 1 comprises three counter-pins 35, 36 and 37 integrally connected to the lateral profile 17 and projecting therefrom preferably parallel to the transmission pin 20. The counter-pins 35, 36 and 37 are, preferably, nearly identical to the pins 25, 26 and 27 and are housable in the seats 28, 29 and 30. In particular, the counter-pins 35, 36 and 37 are arranged around the pin 20 in a manner such that, with the connection of the lateral profile 17 to the rolling-shutter box 16, while the pin 20 penetrates into the seat 21, the counter-pins 35, 36 and 37 penetrate into the seats 28, 29 and 30 pushing the pins 25, 26 and 27 outside the latter, towards the interior of the rolling-shutter box 16. The cap 31 is therefore penetratable from opposite sides, at the seats 28, 29 and 30, respectively by the pins 25, 26 and 27 and by the counter-pins 35, 36 and 37. The plate 33 also acts as translation guide for the pins 25, 26 and 27 parallel to the rotation axis of the shaft 15. Given that the pins 25, 26 and 27 are fit in the seats 28, 29 and 30 when the rolling-shutter box 16 and the lateral profile 17 are mutually disconnected, in order to connect the lateral profile 17 to the rolling-shutter box 16 it is necessary to apply a force of size such to overcome both the static friction that maintains the pins 25, 26 and 27 in the seats 28, 29 and 30, and the possible sliding friction that opposes the entrance of the counter-pins 35, 36 and 37 in the seats 28, 29 and 30.

[0107] With reference to FIGS. 7 and 8, which show the closure system 1 completely assembled (i.e. with the rolling-shutter box 16 and the lateral profile 17 mutually connected), it is possible to observe that the exit of the pins 25, 26 and 27 from the seats 28, 29 and 30 has caused the moving away of the plate 33 from the cap 31. In this configuration, the plate 33 is free to rotate integrally with the shaft 15 around the longitudinal axis thereof.

[0108] In summary, when the rolling-shutter box 16 and the lateral profile 17 are mutually disconnected (as shown in FIGS. 2 to 5), the pins 25, 26 and 27 are fit in the seats 28, 29 and 30 so as to prevent a rotation of the shaft 15 and consequently a movement of the slats 7.

[0109] When the rolling-shutter box 16 and the lateral profile 17 are mutually connected (as shown in FIGS. 1 and 6), the counter-pins 35, 36 and 37 are housed in the seats 28, 29 and 30 in a manner such that the pins 25, 26 and 27 are completely expelled from the latter, so as to allow a rotation of the shaft 15 and consequently a movement of the slats 7.

[0110] When the rolling-shutter box 16 and the lateral profile 17 are mutually connected, since the seats 28, 29 and 30 are occupied by the counter-pins 35, 36 and 37 and lie on a circular crown included in the cap 31, the pins 25, 26 and 27 are obliged to lie outside the seats 28, 29 and 30.

[0111] In an alternative embodiment of the closure system, subject of the invention, not shown in the figures, the closure system comprises a spring compressed between the plate 33 and a stop integrally connected to the rolling-shutter box 16 and lying on the side opposite the cap 31 with respect to the plate 33. In this embodiment, in addition or as an alternative to the fitting, the spring maintains the pins 25, 26 and 27 in the seats 28, 29 and 30 when the rolling-shutter box 16 and the lateral profile 17 are mutually disconnected. In order to connect the lateral profile 17 to the rolling-shutter box 16, it is therefore necessary to apply a force of size such to further compress the spring (beyond or in addition to overcoming both the static friction that maintains the pins 25, 26 and 27 in their seats 28, 29 and 30, and the possible sliding friction that opposes the entrance of the counter-pins 35, 36 and 37 in the seats 28, 29 and 30).

[0112] With reference to FIG. 9, it is possible to observe that the slider 18, at an end 40 that is situated at an end stop (upper end stop, in the figures) when the blind 2 is completely raised, comprises a tongue 41 preferably arranged parallel to the guide 19 and elastically deformable. A stop tooth 42 is integrally connected to the tongue 41 so as to project, by way of example, towards the guide 19. The closure system 1 further comprises, at the lateral profile 17, a stop 43 against which the tooth 42 is in abutment when the slider 18 is at the upper end stop. In particular, the stop 43 is, by way of example, an edge that sufficiently projects from the lateral profile 17 to intercept the tooth 42 when the slider 18 tends to move away from the upper end stop. The stop 43 delimits a seat for housing the tooth 42. The tongue 41, the tooth 42 and the stop 43 act as means for blocking the slider 18 when the latter is situated at the upper end stop, i.e. when the blind 2 is completely raised. When a user of the closure system 1 must translate the slider 18 towards the lower end stop (i.e. when he must completely lower the blind 2) starting from a configuration in which the blind 2 is completely raised, he must apply to the slider 18 a force of size such to elastically bend the tongue 41, so as to make the tooth 42 go beyond the stop 43. Analogously, when a user of the closure system 1 must translate the slider 18, bringing it to the upper end stop (i.e. when he must completely raise the blind), he must apply a force to the slider 18 of size such to elastically bend the tongue 41 so as to make the tooth 42 go beyond the stop 43 and to bring the tooth 42 into the position shown in FIG. 2.

[0113] The stop 43 is preferably arranged in a manner so as to be visible by a user of the closure system 1. Advantageously, when the user translates the slider 18 towards the upper end stop, he can consciously slow the translation of the slider as the latter approaches the upper end stop, so as to prevent sudden impacts that could cause the separation of the slider 18 from the guide 19 and/or the damaging of other components of the closure system 1, such as the rotation mechanism of the shaft 15.

[0114] In an alternative embodiment of the closure system, subject of the invention, not shown in the figures, the closure system comprises a second stop against which the tooth 42 is in abutment when the slider 18 is at the lower end stop. In particular, the second stop is, by way of example, an edge that sufficiently projects from the lateral profile 17 to intercept the tooth 42 when the slider 18 tends to move away from the lower end stop. The second stop delimits a seat for housing the tooth 42. The second stop, together with the tongue 41 and the tooth 42, and in a manner equivalent to the stop 43, acts as means for blocking the slider 18 when the latter is situated at the lower end stop, i.e. when the blind 2 is completely lowered. When a user of the closure system 1 must translate the slider 18 towards the upper end stop (i.e. when he must completely raise the blind 2) starting from a configuration in which the blind 2 is completely lowered, he must apply to the slider 18 a force of size such to elastically bend the tongue 41 such that the second stop goes beyond the tooth 42. Analogously, when a user of the closure system 1 must translate the slider 18, bringing it to the lower end stop (i.e. when he must completely lower the blind), he must apply to the slider 18 a force of size such to elastically bend the tongue 41, such that the tooth 42 goes beyond the second stop and such tooth is brought into the position shown in FIG. 1.

[0115] Analogously to that stated for the stop 43, also the second stop is preferably arranged in a manner so as to be visible by a user of the closure system 1.

[0116] In an alternative embodiment of the closure system, subject of the invention, not shown in the figures, the closure system comprises: a second tongue that is elastically deformable and placed at an end of the slider that is situated at the lower end stop when the blind 2 is completely lowered; a second stop tooth integrally connected with the second tongue so as to project, by way of example, towards the guide 19; and a third stop against which the second tooth is in abutment when the slider 18 is at the lower end stop. The second tongue, the second stop tooth and the third stop constitute, in a manner equivalent to the tongue 41, the tooth 42 and the stop 43, a system for blocking the slider 18 when the latter is situated at the lower end stop, i.e. when the blind 2 is completely lowered. When a user of the closure system 1 must translate the slider 18 towards the upper end stop (i.e. when he must completely raise the blind 2) starting from a configuration in which the blind 2 is completely lowered, he must apply to the slider 18 a force of size such to elastically bend the tongue 41, such that the tooth 42 goes beyond the third stop. Analogously, when a user of the closure system 1 must translate the slider 18, bringing it to the lower end stop (i.e. when he must completely lower the blind), he must apply to the slider 18 a force of such size to elastically bend the tongue 41 so as to make the tooth 42 go beyond the third stop and to bring the tooth into the position shown in FIG. 1.

[0117] Analogous to that stated for the stop 43, also the third stop is preferably arranged in a manner so as to be visible by a user of the closure system 1.

[0118] On the basis of the description provided for a preferred embodiment, it is clear that some changes can be introduced by the man skilled in the art without departing from the scope of the invention as defined by the following claims.