Shielding device for shielding opening

Abstract

A shielding device (1) for shielding an opening is described, having a vertical first side (3). The shielding device comprises: a housing (2) which can be placed vertically on a first side (3) of the opening; the winding roller (4) can be vertically accommodated in the first shell; the shielding cloth (5) can be fixed on the winding roller; the flexible guide unit (7) is used for guiding the shielding cloth downwards; a flexibility compensation unit (10); a slide bar (11) fixable to the shade cloth, comprising a first channel (16) for at least partially guiding at least a variable portion of the first guide unit separated from the shade cloth, capable of slidably receiving and bending the variable portion of the first guide unit (7) when the slide bar is operated along a shade plane (21) in order to reduce the degree of shade of the opening; it further comprises a second channel (17) for guiding at least the variable portion of the compensation unit (10) so as to at least partially slidably receive and bend the variable portion of the compensation unit when the slide bar is operated for the first time. The shielding device comprises a synchronization unit for synchronizing the sliding of the guide unit and the variable part of the compensation unit (10), keeping the sliding rod in the vertical position. In the novel shielding device, when the sliding rod is in the vertical position, the first channel and the second channel are completely arranged on the two opposite sides of a vertical plane (23), and the vertical plane penetrates through the sliding rod and is parallel to the shielding plane.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of opening covering devices, preferably for openings made in a wall. The covering device is of the horizontal sliding type and comprises a rollable covering fabric. BACKGROUND

[0002] With reference to the prior art Figures 1-10 The covering device (100) currently available on the market is of the known type for covering openings, which are rectangular and comprise a first side (3) which is vertical. The known covering device (100) comprises: - a frame; - a housing (102) which is part of the frame and is vertically positionable at the first side (3) of the opening; - a winding roller (not shown in the drawings) which is vertically accommodated in the first housing (102) so as to be rotatable with respect to its axis; Figures 1-10 - a covering fabric (105) which comprises: a first edge which is fixed to the winding roller so that the covering fabric (5) can be wound on and unwound from the winding roller; a second edge which is opposite the first edge; a third edge (106) which is between the first edge and the second edge; - a first guide unit (107) for downwardly guiding the covering fabric (105), wherein the first guide unit (107) is: couplable to the third edge (106) of the covering fabric (105); longitudinally extending; comprises a first end which is fixable to the frame, close to or at the lower part of the first side (3) of the opening; comprises a second end (139) which is opposite the first end; and is bendable along its extension direction so as to form at least one straight segment and at least one curved segment; - a compensation unit (110, 124) which is longitudinally extending; comprises a first end which is fixable to the frame, close to or at the upper part of the first side (3) of the opening; comprises a second end (141) which is opposite the first end; and is bendable along its extension direction so as to form at least one straight segment and at least one curved segment; - a compensation unit (110, 124) which is longitudinally extending; comprises a first end which is fixable to the frame, close to or at the upper part of the first side (3) of the opening; comprises a second end (141) which is opposite the first end; and is bendable along its extension direction so as to form at least one straight segment and at least one curved segment; - a sliding bar (111) fixable to the second edge of the shielding cloth (105); comprising a first end (112) and a second end (113) opposite the first end (112); comprising a first guide channel (116) for guiding at least a variable portion of the first guide unit (107) disengaging from the third edge (106) of the shielding cloth, wherein the first guide channel (116) starts from the first end (112) of the sliding bar (111) and extends within the sliding bar (111) so as to at least partially slide and bend the variable portion of the first guide unit (107) when the sliding bar (111) is operated for the first time along the shielding plane (121) to reduce the degree of opening shielding to a minimum, while gradually forming a first segment (114) of the first guide unit (107) (at least partially bent) and a second segment (115) of the first guide unit (107) starting from the first segment (114) of the first guide unit (107), linear and comprising a second end (139) of the first guide unit (107); wherein the sliding bar (111) further comprises a second guide channel (117) for guiding at least a variable portion of the compensation unit (110, 124), the second guide channel starting from the second end (113) of the sliding bar (111) and extending within the sliding bar (111) so as to at least partially slide and bend the at least variable portion of the compensation unit (110, 124) when the sliding bar (111) is operated for the first time, thereby gradually forming a first segment (174) of the compensation unit (110, 124) (at least partially bent) and a second segment (175) of the compensation unit (110, 124) starting from the first segment (174) of the compensation unit (110, 124), linear and comprising a second end (141) of the compensation unit (110, 124) (see Figure 6 and Figure 9 ). The first guide unit is typically a guide chain.

[0003] The known shielding device (100) further comprises a synchronization unit for synchronizing the sliding of the variable portion of the first guide unit (107) within the first guide channel (116) and the sliding of the variable portion of the compensation unit (110, 124) within the second guide channel (117). The synchronization unit is connected to the respective second ends (139, 141) of the first guide unit (107) and of the compensation unit (110, 124). The compensation unit (110, 124) and the synchronization unit are configured so as to, in use, enable the sliding bar (111) to be kept in a vertical position when operated for the second time along the shielding plane (121) so as to increase or decrease the degree of shielding of the opening along the shielding plane (121). As Figure 6 and Figure 9As shown, the synchronization unit can comprise two synchronization cables (200) and two commutating elements (119). The compensation unit (110, 124) can be a compensation chain (110, 124) (see e.g. Figures 6-8 ) which is flexible and comprises a plurality of compensation chain elements or a flexible metal band (124) (see Figures 9-10 ).

[0004] In this known screening device (100), the screening cloth can be placed vertically along the unfolded screening plane (121) and completely divides the first guide channel (116) and the second guide channel (117) (see Figure 8 ). This means that along the direction of operation (D) of the slide bar (111), the first guide channel (116) and the second guide channel (117) are adjacent along a large part of their longitudinal extension (see Figure 6 , Figure 8 and Figure 9 ). As a result, the dimension (D1) of the slide bar (111) measured along the direction of operation (D) will also depend on the dimensions (D2, D3) of the first guide channel and the second guide channel (117) measured along this direction. This inevitably affects the size of the screening device in its smallest screening configuration (see Figure 4 ). This size partly limits the passage through the opening, especially when the compensation unit (110, 124) is a compensation chain (110) (see Figures 6-8 ). Further, when the compensation unit (110, 124) is a compensation chain (110), the first dimension (D2) of the respective compensation chain element measured along the direction of operation (D) is smaller than the dimension measured in a direction perpendicular to the screening plane (121), i.e. smaller than the dimension (D4) measured perpendicular to the direction of operation (D). This means that, when the known screening device (100) is in the largest screening configuration, the compensation chain (110) is more prone to bend downwards, especially when a user exerts a compression action on the compensation chain while operating the slide bar (111). This not only affects the operation of the slide bar (111), but can also affect the aesthetics, especially in the case of a large opening.

[0005] It should be noted that, in order to resist the bending of the compensation unit (110, 124) and make it more rigid, the amount of material needs to be increased. This will not only increase the relative production costs, but also the weight of the compensation unit (110, 124). In this way, the relative advantage of increasing the rigidity will be offset. Further, in the largest screening configuration, the fourth edge (108) of the screening cloth (105) (opposite the third edge (106)) can move away from the screening plane (121), for example, if the wind is strong, because of the lack of sufficient guidance, and / or insects can subsequently pass through the fourth edge (108) of the screening cloth (105).

[0006] In this regard, it is noted that Figure 7 and Figure 10 A pair of brushes (147) visible in Fig. 2 are fixed to the second housing (142). They are arranged on the open second horizontal side. The bristles of this pair of brushes (147) are longer than those of the conventional brush-equipped guide unit. The latter is known in the technical field as "windproof guide unit", whose bristles are short and hard, and can sufficiently guide the fourth edge (108) of the shielding cloth.

[0007] Further, since the second end portion (113) of the sliding rod (111) needs to be allowed to slide between the pair of brushes (147) when the sliding rod (111) is operated relative to the operation, the bristles of the pair of brushes (147) cannot be too hard, otherwise the operation will be hindered. Therefore, the bristles of the pair of brushes (147) are long and soft, and cannot provide a suitable guide to the fourth edge (108) of the shielding cloth (105), because the guiding efficiency of the bristles is significantly insufficient. For this reason, in the known shielding device (100) having a compensation unit (110) as shown in Figures 1-10 Fig. 2, insects will pass from the opening of the fourth edge (108) of the shielding cloth (105).

[0008] In fact, in the prior art shielding device, it is not possible to have both a compensation unit which, after the operation of the sliding rod, compensates the first guide unit, and a second guide unit which can effectively guide the fourth edge (108) of the shielding cloth (105).

[0009] Therefore, there is a need for a shielding device which, in the minimum shielding configuration, does not excessively limit the passability of the opening, and which, in the maximum shielding configuration, has a structured compensation unit which allows a moderate control of the degree of downward bending.

[0010] Further, it would be highly advantageous to have a shielding device which, in addition to compensating the operation of the sliding rod, can simultaneously provide a suitable guide to the fourth edge of the shielding cloth, preventing the passage of insects close to the fourth edge, by preventing the fourth edge from leaving the shielding plane. SUMMARY

[0011] Therefore, the aim of the present application is to seek other more effective solutions to the drawbacks of the known shielding device with compensation unit described above.

[0012] In particular, the main aim of the present application is to provide a new shielding device which, in the minimum shielding configuration, does not excessively limit the passability of the opening.

[0013] It is a further object of the present invention to provide a new type of screening device which is available and in which the degree of downward bending of the compensating unit is reduced compared to known screening devices in the maximum screening configuration.

[0014] It is a further object of the present invention to provide a screening device which, after operation of the sliding rod, compensates the first guide unit and which effectively guides the fourth edge of the screening cloth so as to prevent it from extending beyond the screening plane and also to prevent insects from passing near the fourth edge.

[0015] The above objects and the objects mentioned are achieved by an opening screening device according to claim 1, which opening is preferably provided in a wall.

[0016] According to the invention, the sliding rod of the screening device has a smaller dimension in the direction of operation than in the prior art. Thus, in the minimum screening configuration, the screening device according to the invention is smaller than known screening devices which are provided with a compensating unit, in particular a compensating chain.

[0017] According to the invention, the first guide channel and the second guide channel are arranged completely on opposite sides of a vertical plane which passes through the sliding rod and which is parallel to the screening plane (see Fig. 1). Figure 20 Thus, the fourth edge of the screening cloth, which is opposite the third edge of the screening cloth and which lies on the screening plane, is accessible. Thus, the second guide unit, which is of conventional design, has a windproof function and is provided with a brush, can guide the fourth edge. In this way, the fourth edge does not extend beyond the screening plane when the screening device is in the maximum screening configuration, so that insects cannot pass through.

[0018] According to the invention, a compensating unit, in particular a narrow compensating chain, can be used which has a smaller dimension in the direction perpendicular to the screening plane. The compensating chain extends in the height direction and can resist a greater degree of bending, and is smaller and lighter than known screening devices. Thus, according to the invention, the compensating unit will be lighter and the procedure of downward bending will be smaller when the screening device is in the maximum screening configuration. Further, because the compensating unit is lighter and requires less manufacturing material, its production costs will also be lower.

[0019] BRIEF DESCRIPTION OF THE DRAWINGS In the following text of the description, specific embodiments of the invention will be described in accordance with the content of the claims and with reference to the drawings, in which Figures 1-10 reference is made to the prior art, Figures 11-44 reference is made to the invention, in which - Figure 1 is a schematic front view of some components of a known first screening device (not installed); - Figure 2 shows a schematic front view of some components of a known second screening device (not installed);Figure 1 Installation steps of the known shielding device for the component shown; - Figure 3 It is along Figure 2 Section AA was prepared. Figure 3 A cross-sectional schematic diagram of another component in the known shielding device shown; - Figure 4 yes Figure 1 A schematic front view of the components shown, which are mounted in an opening and under a minimally obstructed configuration; - Figure 5 yes Figure 1 A schematic front view of the components shown, which are mounted in the opening and under maximum obstruction. - Figure 6 This is a schematic front view of some components of a known second blocking device (under an intermediate blocking configuration); - Figure 7 It is along Figure 6 Section AA was prepared. Figure 6 A cross-sectional view of the component shown; - Figure 8 It is along Figure 6 The cross-section BB was made Figure 6 A cross-sectional view of the component shown; - Figure 9 This is a schematic front view of some components of a known third blocking device; - Figure 10 It is along Figure 9 Section AA was prepared. Figure 9 A cross-sectional view of the component shown; - Figures 11-13 These are partial schematic perspective views of some components in the first embodiment of the shielding device of the present invention, respectively under the minimum shielding structure, the intermediate shielding structure and the maximum shielding structure; - Figure 14 This is a schematic front view of some components in the second embodiment of the shielding device of the present invention; - Figure 15 It is along Figure 14 Section AA was prepared. Figure 14 A sectional view of the component shown; - Figure 16 These are front and perspective views of some components of the third embodiment of the shielding device of the present invention, which are under the intermediate shielding structure; - Figure 17 It is along Figure 16 Section AA was prepared. Figure 16 A partial cross-sectional view of the component shown; - Figure 18 It is along Figure 16 The cross-section BB was madeFigure 16 A cross-sectional view of the component shown; - Figure 19 It is along Figure 16 The cross-section DD was made Figure 16 A cross-sectional view of the component shown; - Figure 20 It is along Figure 16 The cross-section CC was made Figure 16 A cross-sectional view of the component shown; - Figure 21 This is a partial vertical sectional view of some components in the fourth embodiment of the shielding device of the present invention; - Figure 22 and Figure 23 It is presented from different angles Figure 21 Perspective view of the component shown; - Figure 24 yes Figure 17 A magnified view; - Figure 25 yes Figure 24 A partial perspective view of the component shown; - Figure 26 and Figure 27 yes Figure 24 A perspective view of another component shown; - Figure 28 This is a partial vertical sectional view of some components in the fifth embodiment of the shielding device of the present invention; - Figure 29 yes Figure 28 A partial sectional view of the component shown; - Figure 30 and Figure 31 It is presented from different angles Figure 28 A schematic perspective view of another component shown; - Figure 32 These are perspective and exploded views of some components in the fourth embodiment of the shielding device of the present invention; - Figure 33 and Figure 34 yes Figure 32 An enlarged perspective view of the component shown; - Figure 35 This is a schematic front view of the sixth embodiment of the shielding device of the present invention; - Figure 36 This is a schematic front view of the seventh embodiment of the shielding device of the present invention; - Figure 37 This is a schematic front view of the eighth embodiment of the shielding device of the present invention; - Figure 38 The first embodiment of the shielding device of the present invention viewed from above (e.g.) Figure 12 A schematic front view of some components shown in the diagram, which are under the central obscuring structure; - Figure 39 yes Figure 38 The component shown is a sectional view along section AA under the same construction. - Figure 40 yes Figure 38 The component shown is a sectional view along section BB under the same construction. - Figure 41 This is a schematic front view of the ninth embodiment of the shielding device of the present invention; - Figure 42 It is along Figure 41 The cross-section BB was made Figure 41 A partial vertical sectional view of the shielding device shown; - Figure 43 It is along Figure 41 Section AA was prepared. Figure 41 A partial sectional view of the shielding device shown; and - Figure 44 It is along Figure 41 The cross-section CC was made Figure 41 A partial cross-sectional view of the shielding device shown. Detailed Implementation

[0020] It should be noted that, for clarity, not all components of the shielding device are shaded in the accompanying drawings illustrating the cross-section.

[0021] For clarity, the accompanying drawings relating to the invention ( Figures 11-44 The accompanying drawings only show some components of the shielding device of the present invention. Furthermore, in some of the drawings, some components are drawn transparently for better understanding of the present invention.

[0022] exist Figures 11-44 In the figure, reference numeral (1) indicates an opening blocking device, the opening being rectangular and including a vertical first side (3).

[0023] The shielding device (1) of the present invention has the following characteristics: -It includes a framework; - It includes a first housing (2), which is part of the frame and can be placed vertically on the first side of the opening (3). - It includes a winding roller (4) which can be vertically housed in the first housing (2) so as to rotate relative to its axis; - It includes a shielding cloth (5) comprising: a first edge fixed to a winding roller (4) so ​​that the shielding cloth (5) can be wound onto and unwound from the winding roller (4); a second edge (9) opposite to the first edge; and a third edge (6) located between the first edge and the second edge (9) (see See Figure 32 ); - it comprises a first guide unit (7) (preferably a guide chain) for downwardly guiding the blind cloth (5), the first guide unit (7) being couplable to the third edge (6) of the blind cloth (5) and extending in the longitudinal direction and comprising a first end (38) which is fixable to the frame, near the lower part of the first side (3) of the opening or to the lower part of the first side (3) of the opening and comprising a second end (39), opposite the first end (38), which is bendable in its extension direction so as to form at least one straight segment and at least one curved segment (see Figure 13 ) ; - it comprises a compensation unit (10) (preferably a compensation chain) extending in the longitudinal direction and comprising a first end (40) which is fixable to the frame, near the upper part of the first side (3) of the opening or to the upper part of the first side (3) of the opening and comprising a second end (41), opposite the first end (40), which is bendable in its extension direction so as to form at least one straight segment and at least one curved segment (see Figure 13 ) ; - it comprises a sliding bar (11) which is fixable to the second edge (9) of the blind cloth (5) and comprises a first end (12) and a second end (13), opposite the first end (12) (both in the longitudinal direction) and comprises a first guide channel (16) (see Figure 40 ) for guiding at least a variable portion of the first guide unit (7) which is disengaged from the third edge (6) of the blind cloth; - the first guide channel (16) starts from the first end (12) of the sliding bar (11) and extends inside the sliding bar (11) so as to at least partially slide and bend the variable portion of the first guide unit (7) when the sliding bar (11) is operated for the first time along the blind plane (21) so as to reduce the degree of shading of the opening; - the sliding bar (11) further comprises a second guide channel (17) (see Figure 39 ) for guiding at least a variable portion of the compensation unit (10), the second guide channel (17) starting from the second end (13) of the sliding bar (11) and extending inside the sliding bar (11) so as to at least partially slide and bend the variable portion of the compensation unit (10) when the sliding bar (11) is operated for the first time; - it comprises a synchronization unit for synchronizing the sliding of the variable portion of the first guide unit (7) inside the first guide channel (16) and the sliding of the variable portion of the compensation unit (10) inside the second guide channel (17); wherein the synchronization unit is connectable to the first guide unit (7) and to the compensation unit (10); - the compensation unit (10) and the synchronization unit are configured so that, in use, when the sliding bar (11) is operated a second time along the shielding plane (21), the sliding bar (11) can be kept in the vertical position in order to increase or decrease the degree of shielding of the opening along the shielding plane (21); the shielding device according to the application is characterized in that, when the sliding bar (11) is fixed to the second edge (9) of the shielding cloth (5) and is in the vertical position, the first guide channel (16) and the second guide channel (17) are completely arranged on opposite sides of a vertical plane (23) passing through the sliding bar (11) and parallel to the shielding plane (21) (see Figure 19 and Figure 20 ).

[0024] At the first operation of the sliding bar (11), the variable part of the first guide unit (7) can be formed step by step (see Figure 14 ): a first section (14) of the first guide unit (7) which is at least partially curved, and a second section (15) of the first guide unit (7) which is straight and which starts from the first section (14) of the first guide unit (7) and comprises the second end (39) of the first guide unit (7). Further, at the first operation, the variable part of the compensation unit (10) can be formed step by step (see Figure 14 ): a first section (74) of the compensation unit (10) which is at least partially curved, and a second section (75) of the compensation unit (10) which is straight and which starts from the first section (74) of the compensation unit (10) and comprises the second end (41) of the compensation unit (10).

[0025] Preferably, the first guide channel (16) is completely divided by the shielding plane (21). Obviously, the shielding plane (21) does not divide the second guide channel (17).

[0026] The winding roller (4) can comprise an elastic rewinding device (for example, a preloaded rewinding spring, not shown) in order to automatically wind the shielding cloth.

[0027] Preferably, the first guide section (25) of the first guide channel (16) can comprise a single recess, towards the second end (13) of the sliding bar (11). Likewise, the first guide section (29) of the second guide channel (17) can comprise a single recess, towards the first end (12) of the sliding bar (11).

[0028] Preferably, the first guide unit (7) comprises or is a guide chain (7). The guide chain can comprise a plurality of guide chain elements, wherein each guide chain element (219) of the plurality of guide chain elements (see Figure 14 , Figures 21-31 ) has a respective guide section facing upwards which can be connected with the third edge (6) of the shielding cloth.

[0029] Advantageously, the compensation unit (10) is selected from the following two: a flexible compensation chain (10) comprising a plurality of chain elements; and a flexible metal band (not shown in the drawings relating to the present application), which has a downward concavity with respect to the cross section of the plane of occlusion (21), similar to the concavity shown in the drawings relating to the prior art (see the drawings relating to the prior art Figure 9 and Figure 10 , reference 124).

[0030] It is noted that the first operating action and the second operating action can be both in manual mode and in motorized mode, preferably in manual mode.

[0031] According to a preferred embodiment of the occlusion device (1) of the present application, as Figure 40 detailed, the first guide channel (16) can comprise: a first guide portion (25), which is at least partially curved (and, preferably, has a straight horizontal initial segment, although this segment can be extremely short, even just a few millimeters); the first guide portion starts from the first end portion (12) of the sliding rod (11) (preferably, the one facing the first side of the first housing); a second guide portion (26), which starts from the first guide portion (25) of the first guide channel (16); the second guide portion is straight (and, preferably, in a vertical condition) and extends towards the second end portion (13). In this case, the second guide channel (17) comprises (see Figure 39 ): a first guide portion (29), which is at least partially curved (and, preferably, has a straight horizontal initial segment, although this segment can be extremely short, even just a few millimeters); the first guide portion starts from the second end portion (13) of the sliding rod (11) (preferably, the one facing the side of the first housing); and a second guide portion (30), which starts from the first guide portion (29) of the second guide channel (17); the first guide portion is straight (and, preferably, in a vertical condition) and extends towards the first end portion (12).

[0032] As Figure 14 and Figure 35 detailed, advantageously, the synchronization unit can comprise: - a lower inversion element (33) and an upper inversion element (34), both arranged in the sliding rod (11); - a first cable (35) bendable to form at least one bending segment having a first end fixable to the second end (39) of the first guide unit (7), a second end fixable to the second end (41) of the compensation unit (10), and an intermediate portion which, when the first end of the first cable (35) is fixed to the second end (39) of the first guide unit (7) arranged in the first guide channel (16) and the second end of the first cable (35) is fixed to the second end (41) of the compensation unit (10) arranged in the second guide channel (17), can be (preferably is) below and in contact with the lower reversing element (33) in order to bend and stretch the first cable (35); - a second cable (36) bendable to form at least one bending segment having a first end fixable to the second end (39) of the first guide unit (7), a second end fixable to the second end (41) of the compensation unit (10), and an intermediate portion which, when the first end of the second cable (36) is fixed to the second end (39) of the first guide unit (7) arranged in the first guide channel (16) and the second end of the second cable (35) is fixed to the second end (41) of the compensation unit (10) arranged in the second guide channel (17), can be (preferably is) above and in contact with the upper reversing element (34) in order to bend and stretch the second cable (36).

[0033] Preferably, the lower reversing element (33) and the upper reversing element (34) are arranged in the first end portion (12) and in the second end portion (13) of the sliding rod (11), respectively.

[0034] It is noted that the lower reversing element (33) and the upper reversing element (34) can be a relay, i.e. an idler, whose rotation axis is preferably arranged parallel to (see Figure 14 , or more advantageously perpendicular to the shielding plane (21) (see Figure 35 ). Alternatively, the lower reversing element (33) and the upper reversing element (34) can be cylindrical elements whose axis is preferably arranged parallel to, or more preferably perpendicular to, the shielding plane (21).

[0035] According to a preferred embodiment of the shielding device (1), the device can further comprise: - a second guide unit (37) (see Figure 17 , Figure 18 , Figure 21 , Figure 24 , Figure 28 , Figure 32 , Figure 37 and Figures 41-44) for upwardly guiding the blind cloth (5), the second guiding unit (37) being connectable with a fourth edge (8) of the blind cloth (5), the fourth edge being opposite to the third edge (6) of the blind cloth (5), extending in the longitudinal direction, comprising a first end (440), comprising a second end (441) opposite to the first end (440), being horizontally positionable (and preferably positioned) at the second side (62) of the opening, the second side being located at an upper portion of the first side (3) of the opening, being transversely aligned with the compensation unit (10), the first end of the second guiding unit (37) being fixed to the frame, proximate to or at the upper portion of the first side (3) of the opening, and the second end of the second guiding unit (37) being fixed to the frame, proximate to or at the upper portion of the third side (61) of the opening (opposite to the first side (3) of the opening).

[0036] Optionally, the present embodiment can further comprise a second housing (42) (see Figures 11-13 、 Figure 21 、 Figure 24 、 Figure 28 and Figure 32 ), the second housing being part of the frame and being horizontally positionable at the second side (62) of the opening, wherein, when the second housing (42) is present and horizontally positioned, the following components can be simultaneously accommodated: at least part of the compensation unit (10) in the horizontal position, the second guiding unit (37) in the horizontal position and transversely aligned with the compensation unit (10), and at least part of the second end portion (13) of the sliding rod (11), wherein the second end portion (13) of the sliding rod (11) and the second housing (42) are relatively freely slidable.

[0037] It is noted that the first guiding unit (7) and the second guiding unit (37) can guide the third edge (6) and the fourth edge (8) of the blind cloth (5) respectively, and fix and properly accommodate them.

[0038] In a preferred aspect of the present application, the first guiding unit (7) (which can preferably be a guiding chain) can comprise a first connecting element arranged on the shielding plane (21) and connectable with the third edge (6) of the blind cloth (5). Preferably, the first connecting element comprises or is a first seat (43): extending in the longitudinal direction, and having a first through hole (46) (see Figure 17 、 Figure 24 and Figure 28), the first through hole extending in the longitudinal direction, being placeable (and preferably arranged) on the shielding plane (21), and having a first width measured in a direction perpendicular to the shielding plane (21). In this case, the third edge (6) of the shielding cloth (5) is receivable in the first seat of the first connecting element (43) and comprises a first set of protruding fixing elements, wherein each protruding fixing element (44, 45) of the first set of protruding fixing elements has a first thickness measured in a direction perpendicular to the shielding plane (21), the first thickness being greater than the first width, so as to prevent the third edge (6) of the shielding cloth (5) from exiting from the first seat (43) of the first connecting element through the first through hole (46) of the first seat (43) of the first connecting element.

[0039] One particular preferred embodiment of the shielding device (1) is where the second guiding unit (37) comprises a second connecting element provided on the shielding plane (21) and connectable with the fourth edge (8) of the shielding cloth (5). Preferably, the second connecting element comprises (and preferably is) a second seat (343): the second seat extending in the longitudinal direction; and having a second through hole (346) (see Figure 17 、 Figure 24 and Figure 28 ), the second through hole extending in the longitudinal direction, being placeable (and preferably arranged) on the shielding plane (21), and having a second width measured in a direction perpendicular to the shielding plane (21); and the fourth edge (8) of the shielding cloth (5) is receivable in the second seat of the second connecting element (343) and comprises a second set of protruding fixing elements, wherein each protruding fixing element (44, 45) of the second set of protruding fixing elements has a second thickness measured in a direction perpendicular to the shielding plane (21), the second thickness being greater than the second width, so as to prevent the fourth edge (8) of the shielding cloth (5) from exiting from the second seat (343) of the second connecting element through the second through hole (346) of the second seat (343) of the second connecting element.

[0040] Further, preferably, each protruding fixing element (44, 45) of the first set of protruding fixing elements is a zipper (or zip) tooth (45), because this can simplify the production of the shielding cloth (5) and enable it to be easily wound on the winding roller (4) (see Figures 28-29 ). Further, preferably, each protruding fixing element (44, 45) of the second set of protruding fixing elements is a zipper tooth (45).

[0041] Advantageously, the first through hole (46) of the first seat (43) of the first connecting element and, if present, the second through hole (346) of the second seat (343) of the second connecting element are symmetrically arranged with respect to the shielding plane (21), since, in this case, this symmetrical arrangement makes it possible to achieve a more effective connection. Further, each of the protruding securing elements (44, 45) of the first group of protruding securing elements, if present, protrudes symmetrically from both sides of the shielding cloth (5). The protruding securing elements (44, 45) can advantageously be constituted by snaps (44) (thus forming snap securing elements) or by zipper teeth (45) (thus forming zipper securing elements), but can also be constituted by other types of protruding securing elements (44, 45).

[0042] To ensure a precise positioning of the shielding cloth, according to an embodiment of the present application, wherein a second connecting element is provided, the shielding device (1) of the present application can preferably comprise an adjustment element (not shown) for supporting the second seat (343) of the second connecting element and for adjusting the distance between the second through hole (346) of the second seat (343) of the second connecting element and the fourth edge (8) of the shielding cloth (5) located in the second seat (343) of the second connecting element. Advantageously, the adjustment element can be accommodated in the second housing (42).

[0043] Since the thickness of these teeth (45) is smaller than the thickness of the first and second and of the other types of protruding securing elements (44, 45) (for example, with respect to the snaps (44)), in the presence of these teeth (45), the first through hole (46) of the first seat (43) of the first connecting element and the second through hole (346) of the second seat (343) of the second connecting element must have a minimum measurement tolerance. For this purpose, with respect to the first connecting element, a preferred embodiment of the present application is preferred (see Figures 28-31 ), wherein the first guide unit (7) is a guide chain (7) comprising a plurality of guide chain elements, wherein each of the plurality of first guide chain elements (see Figure 30 、 Figure 31 ) comprises: - a bottom wall (50); - a first outer side wall (51) and a second outer side wall (52) starting from opposite sides of the bottom wall (50) (and preferably parallel to each other); - a first inner wall (53) and a second inner wall (54) arranged between the first outer side wall (51) and the second outer side wall (52), starting from the bottom wall (50), capable of (and preferably will) being arranged parallel to the shielding plane (21) and mutually detached from (and preferably parallel to each other) the first outer side wall (51) and the second outer side wall (52); - a first fixed wall (55) starting from the distal end of the first inner wall (53), protruding from the first inner wall (53) and directed towards the second inner wall (54); and - a second fixed wall (56) starting from the distal end of the second inner wall (54), protruding from the second inner wall (54) and directed towards the first inner wall (53); wherein the first inner wall (53), the second inner wall (54), the first fixed wall (55) and the second fixed wall (56) together define a portion of the first seat (43) of the first connecting element, and the first fixed wall (55) and the second fixed wall (56) together define a portion of the first through hole (46) of the first seat (43) of the first connecting element. Obviously, these portions are to be understood as being arranged transversely with respect to the shielding plane (21).

[0044] The first inner wall (53) and the second inner wall (54) are mutually separated from the first outer side wall (51) and the second outer side wall (52), which facilitates a more precise control of the dimensions of the first through hole (46) of the first seat (43) of the first connecting element for fixing the teeth (45) of the fourth edge (8) of the shielding cloth (5), especially when each of the plurality of first connecting elements is made by injection moulding, wherein in the cooling step after injection moulding, slight deformations often occur.

[0045] To ensure that the second through hole (346) of the second seat (343) of the second connecting element has minimum measurement tolerances, when provided with a second guide unit (37) having the second connecting element (37), preferably comprising (and preferably consisting of): a shaped element (see Figure 28 ): which extends longitudinally and comprises a body (57) having an open annular cross section, which defines the second seat (343) of the second connecting element inside, and comprises the second through hole (346) of the second seat (343) of the second connecting element; wherein the shaped element further comprises a first longitudinal wing (58) and a second longitudinal wing (59), which are fixed together with the body of the shaped element and are arranged on opposite sides with respect to the second through hole (346) of the second seat (343) of the second connecting element; a support element (60) extending longitudinally; which can be placed horizontally (and preferably in this position) at the open second side (62) in order to support the shaped element horizontally at the shielding plane (21) and to direct the second through hole (346) of the second seat (343) of the second connecting element downwards, while abutting the first longitudinal wing (58) and the second longitudinal wing (59) of the shaped element from below.

[0046] In this case, the shielding device (1) according to the application can preferably comprise an adjustment element (not shown) for supporting a second seat (43) of a second connecting element and for adjusting the distance between the second through hole (346) of the second seat (343) of the second connecting element and the fourth edge (8) of the shielding cloth (5) located in the second seat (43) of the second connecting element. Advantageously, the adjustment element can be advantageously housed in the second housing (42).

[0047] According to a preferred aspect of the application, the first guiding unit (7) can comprise a third connecting element which is arranged on the shielding plane (21) and which can be connected to the third edge (6) of the shielding cloth (5). In this case, the second guiding unit (37) (if present) can comprise a fourth connecting element which is arranged on the shielding plane (21) and which can be connected to the fourth edge (8) of the shielding cloth (5). Preferably, the third connecting element (47) and the fourth connecting element (if present) comprise a pair of brushes (47, 347) (see Figures 21-23 、 Figures 32-34 、 Figure 37 ) which can be placed (and preferably are placed) in a position which is substantially symmetrical with respect to the shielding plane (21), wherein the respective bristles are directed towards the shielding plane (21) and end there. In this case, the shielding cloth (5) comprises a fabric whose weft can be connected to the bristles.

[0048] It is noted that in Figure 32 , the first guiding unit (7) is a guiding chain, the chain elements (407) of which are shown in Figure 33 and Figure 34 .

[0049] The bristles of the pair of brushes (47) of the first guiding unit (7) are preferably inclined downwards, while the bristles of the pair of brushes (347) of the second guiding unit (37) are inclined upwards (see Figures 21-23 , shown with respect to the shielding plane (21)), since in this way the weft of the shielding cloth (5) can be connected more effectively.

[0050] In a preferred aspect of the application, advantageously, the second guiding unit (37) can comprise a fifth connecting element instead of the second connecting element and the fourth connecting element (see Figures 41-43), the fifth connecting element in turn comprising a third seat (443) extending in the longitudinal direction and having a third through hole (446) extending in the longitudinal direction, horizontally positionable (and preferably positioned horizontally) along the shielding plane (21) and having a third width measured in a direction perpendicular to the shielding plane (21); wherein the fifth connecting element further comprises a cantilever element (445) extending in the longitudinal direction, arranged in the third seat (443) of the fifth connecting element, having a first end (450) fixable (and preferably fixed) to the frame, proximate to the upper portion of the third side (61) of the opening, or fixable (and preferably fixed) to the upper portion of the third side (61) of the opening, having a second free end (449), having a third thickness measured in a direction perpendicular to the shielding plane (21), greater than the third width; and the fourth edge (8) of the shielding cloth (5) comprising a hem (448) in turn comprising a ring-shaped opening (447) (see Figure 41 ), arranged proximate to or on the second edge (9) of the shielding cloth (5), into which the cantilever element (445) (from its second free end (449)) is insertable (and preferably inserted), so as to prevent the fourth edge (8) of the shielding cloth (5) from exiting from the third seat (443) of the fifth connecting element through the third through hole (446) of the third seat (443) of the fifth connecting element, the hem (448) of the fourth edge having the cantilever element (445) inserted inside it (through the ring-shaped opening (447) of the hem (448)).

[0051] In this case, it is preferable that the shielding device (1) of the application comprises an adjustment element (not shown) for supporting the third seat (443) of the fifth connecting element and for adjusting the distance between the third through hole (446) of the third seat (443) of the fifth connecting element and the fourth edge (8) of the shielding cloth (5) arranged in the third seat (443) of the fifth connecting element. Advantageously, the adjustment element can be advantageously housed in the second housing (42).

[0052] Advantageously, the hem (448) can be made by sewing, welding (in the case of plastic materials), or by fixing a flexible tubular element that is rollable in the longitudinal direction, and the like.

[0053] Advantageously, the third through hole (446) of the third seat (443) of the fifth connecting element is arranged symmetrically with respect to the shielding plane (21), since in this case a more efficient connection can be achieved.

[0054] In order to reduce the size of the sliding rod (11) and to prevent the compensation unit from bending in the maximum shielding configuration, the shielding device (1) according to the preferred application of the application satisfies the following condition: - the width of the first guide channel (16) is measured in a direction perpendicular to the shielding plane (21); - the width of the second guide channel (17) is measured in a direction perpendicular to the plane of obstruction (21) and is smaller than the width of the first guide channel (16); - wherein the fourth thickness (S4) of the first guide unit (7) is measured in a direction perpendicular to the plane of obstruction (21); the fifth thickness (S5) of the compensation unit (10) is measured in a direction perpendicular to the plane of obstruction (21) and is smaller than the fourth thickness (S4) (see Figure 20 ).

[0055] In this case, the first guide unit (7) can be a further guide chain (7) comprising a plurality of further guide chain elements; and the compensation unit (10) can be a further compensation guide chain comprising a plurality of further compensation chain elements.

[0056] In the case of a particularly large second side (62) of the opening, in order to completely obstruct the opening, it can be necessary to equip two shielding devices (1) according to the invention. In order to bring the shielding devices into their respective maximum shielding configuration, it is necessary to operate the sliding rod (11) of the first shielding device from the first side of the opening towards the centre of the opening and it is necessary to operate the sliding rod (11) of the second shielding device from the third side (61) of the opening towards the centre of the opening. Since the first guide channel (16) and the second guide channel (17) provided in the sliding rod (11) described so far are not symmetrically arranged with respect to the plane of obstruction (21), the two sliding rods (11) placed side by side in the centre of the opening will not be perfectly aligned. This is true unless the following is the case: the two shielding devices (1) according to the invention are identical to each other and are perfectly symmetrical with respect to the plane of obstruction (21); or, alternatively, in a pair of shielding devices (1) according to the invention, one of which is designed exclusively for fixing on the right side of the opening and the other of which is designed exclusively for fixing on the left side of the opening, and the sliding rods (11) of the two are aligned in the centre of the opening. Below is a description of an embodiment of the shielding device (1) according to the invention in which the sliding rod (11) comprises two specific housings in which the compensation unit can be accommodated. In this embodiment, the shielding device (1) according to the invention is arranged symmetrically with respect to the plane of obstruction (21). In this embodiment, the sliding rod (11) also comprises a third guide channel (18) (see Figure 37), for guiding at least a variable portion of the compensating unit (10), the third guide channel (18) starting from the second end portion (13) of the sliding rod (11) and extending inside the sliding rod (11) so as to at least partially slide and bend the variable portion of the compensating unit (10) when the sliding rod (11) is operated for the first time; the second guide channel (17) is arranged on the opposite side with respect to the first guide channel (16) (and thus also with respect to the shielding plane (21)). This is in order to be able to house the compensating unit (10) in the second guide channel (17) or in the third guide channel (18). In this way it is possible to house the compensating unit (10) of the first shielding device (1) in its second guide channel (17) and the compensating unit (10) of the second shielding device (1) in its third guide channel (18). In this way, when the shielding devices (1) are in the maximum shielding configuration, the two sliding rods (11) of the two shielding devices will be aligned with respect to the shielding plane (21) at the center of the opening. Preferably, the third guide channel (18) is identical to the second guide channel (17).

[0057] In this case, advantageously, the second housing (42) (if present) (preferably present) is placed horizontally and can comprise: a fourth seat (63) extending in the longitudinal direction; and a fifth seat (64) extending in the longitudinal direction, identical to the fourth seat (63); wherein the fourth seat (63) and the fifth seat (64) are parallel to each other and are arranged (preferably placed) on opposite sides of the shielding plane (21) so as to house the compensating unit (10) in the fourth seat (63) or in the fifth seat (64) (see Figure 37 ).

[0058] In this case, when the second guide unit (37) is also present and the second housing (42) is present and placed horizontally, the second housing also comprises a sixth seat (65) for horizontally housing the second guide unit (37), wherein the sixth seat (65) extends in the longitudinal direction, between the fourth seat (63) and the fifth seat (64), parallel to them and divided in the longitudinal direction by the shielding plane (21) (see Figure 37 ). In this case, the second end portion (13) of the sliding rod (11) in the vertical position can advantageously comprise a terminal plate (500) (see Figure 32 ) divided in the longitudinal direction by the shielding plane (21) and slidingly receiving the second guide unit (37) in the sixth seat (65).

[0059] It should be understood that the shielding cloth (5) of the shielding device (1) according to the present application can be selected from the group consisting of: an insect-proof shielding cloth (5), a shielding cloth (5) for at least partially shielding light, a waterproof shielding cloth (5), a curtain cloth, a sunshade cloth, and a waterproof and at least partially transparent to visible light shielding cloth (5).

[0060] Figure 36 An embodiment of the shielding device (1) according to the present application is shown, wherein the first guide unit (7) comprises a first groove (66) facing the second end portion (13) of the sliding rod (11) when the second end (39) of the first guide unit (7) is arranged in the first guide channel (16); and the compensation unit (10) comprises a second groove (67) facing the first end portion (12) of the sliding rod (11) when the second end (41) of the compensation unit (10) is arranged in the second guide channel (17); and the synchronization unit comprises: - a lower gear wheel (68) arranged in the sliding rod (11) (preferably in the first end portion (12) of the sliding rod (11)) and engageable with the first groove (66) (obviously when the second end (39) of the first guide unit (7) is arranged in the first guide channel (16) and faces the second end portion of the sliding rod); - a lower synchronization roller (69) coaxial with the lower gear wheel (68) and fixedly connected therewith; - an upper gear wheel (70) arranged in the sliding rod (11) (preferably in the second end portion (13) of the sliding rod) and engageable with the second groove (67) (obviously when the second end (41) of the compensation unit (10) is arranged in the second guide channel); - an upper synchronization roller (71) coaxial with the upper gear wheel (70) and fixedly connected therewith; - a connecting element (218) in the shape of a ring, which can be bent into the shape of an "8", wherein the lower portion of the connecting element (218) is arranged below the lower synchronization roller (69) and directly contacts the same, and the upper portion of the connecting element (218) is arranged above the upper synchronization roller (71) and contacts the same, so as to stretch the connecting element (218) into the shape of an "8" and pull along the path of the "8" when the lower gear wheel (68) and the upper gear wheel (70) are engaged with the first groove (66) and the second groove (67) respectively and rotate in opposite directions during the secondary operation of the sliding rod (11).

[0061] Advantageously, the connecting element (218) can be in the shape of a band, a cable, a wire or a band in the shape of a groove connected head to tail.

[0062] The first guide unit (7) and the corresponding first and third connecting elements, the compensation unit (10), the second guide unit (37) and the corresponding second, fourth and fifth connecting elements, and the second housing (42) can be relatively stretched, the stretching direction of which is parallel to the shielding plane (21) and the stretching length of which is at least equal to or greater than the extension length of the shielding cloth, and the stretching length is measured in the direction parallel to the shielding plane (21).

[0063] It should be understood that the above description is merely illustrative and that variations in the structures described above should be considered to fall within the scope of the technical solutions claimed below.

Claims

1. A blocking device (1) for blocking an opening, said opening being rectangular and including a vertical first side (3), wherein, The shielding device (1): -Includes the framework; - Includes a first housing (2), which is part of the frame and can be placed vertically on the first side of the opening (3). - Includes a winding roller (4), which can be vertically housed within the first housing (2) so as to rotate relative to its axis; - Includes a shielding cloth (5), the shielding cloth comprising: a first edge fixed to the winding roller (4) so ​​that the shielding cloth (5) can be wound around the winding roller (4) and unwound therefrom; a second edge (9) opposite to the first edge; and a third edge (6) located between the first edge and the second edge (9); - Includes a first guide unit (7), preferably a guide chain, for guiding the cover cloth downwards, the first guide unit (7): is coupled to the third edge (6) of the cover cloth (5); extends longitudinally; includes a first end (38), which is fixed to the frame, near the lower part of the first side (3) of the opening or located at the lower part of the first side (3) of the opening; includes a second end (39), opposite to the first end (38); and is bendable along its extension direction to form at least one straight segment and at least one curved segment; - Includes a compensation unit (10), preferably a compensation chain: the compensation unit extends longitudinally; includes a first end (40), which may be fixed to the frame, near the upper part of the first side (3) of the opening or located on the upper part of the first side (3) of the opening; includes a second end (41), opposite to the first end (40); and may be bent along its extension direction to form at least one straight segment and at least one curved segment; - Includes a sliding rod (11), which is fixable to the second edge (9) of the cover cloth (5); includes a first end (12) and a second end (13) opposite to the first end (12); includes a first guide channel (16) for guiding at least a variable portion of the first guide unit (7) that is disengaged from the third edge (6) of the cover cloth; The first guide channel (16) originates at the first end (12) of the sliding rod (11) and extends within the sliding rod (11) so that when the sliding rod (11) is first operated along the blocking plane (21), it at least partially slides to receive and bends the variable portion of the first guide unit (7) to reduce the degree of obstruction of the opening; The sliding rod (11) further includes a second guide channel (17) for guiding at least a variable portion of the compensation unit (10), the second guide channel (17) originating at the second end (13) of the sliding rod (11) and extending within the sliding rod (11) so as to at least partially slide and bend the variable portion of the compensation unit (10) when the sliding rod (11) is first operated; - Includes a synchronization unit for synchronizing the sliding of the variable portion of the first guiding unit (7) in the first guiding channel (16) and the sliding of the variable portion of the compensation unit (10) in the second guiding channel (17); - The synchronization unit can be connected to the first guiding unit (7) and the compensation unit (10). - The compensation unit (10) and the synchronization unit are configured such that, during use, when the sliding rod (11) is operated twice along the blocking plane (21), the sliding rod (11) can be kept in a vertical position so as to increase or decrease the degree of blocking of the opening along the blocking plane (21); -Characteristics: When the sliding rod (11) is fixed to the second edge (9) of the shielding cloth (5) and is in a vertical position, the first guide channel (16) and the second guide channel (17) are completely arranged on opposite sides of the vertical plane (23), which passes through the sliding rod (11) and is parallel to the shielding plane (21).

2. The shielding device (1) according to the preceding claim further includes: - A second guide unit (37) for guiding the covering cloth (5) upward, the second guide unit (37) being coupled to a fourth edge (8) of the covering cloth (5), the fourth edge (8) being opposite to the third edge (6) of the covering cloth; extending longitudinally; Includes a first end (440); includes a second end (441) opposite to the first end (440); can be horizontally placed on the second side (62) of the opening, the second side starting from the upper part of the first side (3) of the opening and laterally aligned with the compensation unit (10), wherein the first end of the second guide unit (37) is fixed to the frame, near the upper part of the first side (3) of the opening, or fixed to the upper part of the first side (3) of the opening, and the second end of the second guide unit (37) is fixed to the frame, near the upper part of the third side (61) of the opening, the third side (61) opposite to the first side (3), or fixed to the upper part of the third side (61) of the opening; and - Optionally, a second housing (42), which is part of the frame, can be placed horizontally on the second side (62) of the opening; wherein, when present and in a horizontal position, the second housing (42) can simultaneously accommodate the following components: the compensation unit (10) which is at least partially in a horizontal position; the second guide unit (37) which is in a horizontal position and laterally aligned with the compensation unit (10); and at least a portion of the second end (13) of the sliding rod (11), wherein the second end (13) of the sliding rod (11) can slide freely relative to the second housing (42).

3. The shielding device (1) according to the preceding claim, wherein, The first guiding unit (7) includes a first connecting element disposed on the shielding plane (21) and connectable to the third edge (6) of the shielding cloth (5), wherein the first connecting element includes a first seat (43): the first seat extends longitudinally; and has a first through hole (46), the through hole extending longitudinally, being placed on the shielding plane (21), and having a first width measured in a direction perpendicular to the shielding plane (21); and The third edge (6) of the shielding cloth (5) can be accommodated in the first seat (43) of the first connecting element and includes a first set of protruding fixing elements, each of the first set of protruding fixing elements (44, 45) having a first thickness measured in a direction perpendicular to the shielding plane (21), the first thickness being greater than the first width, thereby preventing the third edge (6) of the shielding cloth (5) from exiting the first seat (43) of the first connecting element through the first through hole (46) of the first seat (43) of the first connecting element.

4. The shielding device (1) according to claim 2 or 3, wherein, The second guiding unit (37) includes a second connecting element disposed on the shielding plane (21) and connectable to the fourth edge (8) of the shielding cloth (5), wherein the second connecting element includes a second seat (343): the second seat extends longitudinally and has a second through hole (346), the second through hole extending longitudinally, being positioned on the shielding plane (21), and having a second width measured in a direction perpendicular to the shielding plane (21); and The fourth edge (8) of the shielding cloth (5) can be accommodated in the second seat (343) of the second connecting element and includes a second set of protruding fixing elements, wherein each of the protruding fixing elements (44, 45) in the second set of protruding fixing elements has a second thickness measured in a direction perpendicular to the shielding plane (21), the second thickness being greater than the second width, thereby preventing the fourth edge (8) of the shielding cloth (5) from exiting the second seat (343) of the second connecting element through the second through hole (346) of the second seat (343).

5. The shielding device (1) according to claim 3 or 4, wherein, Each of the protruding fixing elements (44, 45) in the first group of protruding fixing elements is a zipper tooth (45).

6. The shielding device (1) according to any one of claims 3 to 5, wherein, Each of the protruding fixing elements (44, 45) in the second group of protruding fixing elements is a zipper tooth (45).

7. The shielding device (1) according to claim 5 or 6, wherein, The first guiding unit (7) is a guiding chain, comprising a plurality of guiding chain elements, wherein each of the plurality of guiding chain elements comprises: -Bottom wall(50); - The first outer sidewall (51) and the second outer sidewall (52) originate from opposite sides of the bottom wall (50); - The first inner wall (53) and the second inner wall (54) are disposed between the first outer wall (51) and the second outer wall (52), starting from the bottom wall (50), and can be placed parallel to the shielding plane (21), and are detached from the first outer wall (51) and the second outer wall (52); - A first fixed wall (55), originating at the distal end of the first inner wall (53), protruding from the first inner wall (53) and toward the second inner wall (54); and - A second fixed wall (56) originates at the distal end of the second inner wall (54), protrudes from the second inner wall (54), and faces the first inner wall (53). The first inner wall (53), the second inner wall (54), the first fixed wall (55) and the second fixed wall (56) together define a portion of the first seat (43) of the first connecting element, and the first fixed wall (55) and the second fixed wall (56) together define a portion of the first through hole (46) of the first seat (43) of the first connecting element.

8. The shielding device (1) according to any one of claims 1 and 2, wherein, The first guide unit (7) includes a third connecting element disposed on the shielding plane (21) and connectable to the third edge (6) of the shielding cloth (5); and if the second guide unit (37) is present, it includes a fourth connecting element disposed on the shielding plane (21) and connectable to the fourth edge (8) of the shielding cloth (5), wherein the third connecting element and the fourth connecting element (if present) include a pair of brushes (47, 347) which can be placed in a position approximately symmetrical with respect to the shielding plane (21), with their respective bristles facing the shielding plane (21) and terminating at the shielding plane; and the shielding cloth (5) includes a fabric whose weft yarns can be connected to the bristles.

9. The shielding device (1) according to any of the preceding claims, wherein: - The width of the first guide channel (16) is measured in a direction perpendicular to the blocking plane (21); - The width of the second guide channel (17) is measured in a direction perpendicular to the blocking plane (21) and is smaller than the width of the first guide channel (16); -The fourth thickness (S4) of the first guiding unit (7) is measured in a direction perpendicular to the blocking plane (21), and the fifth thickness (S5) of the compensation unit (10) is measured in a direction perpendicular to the blocking plane (21) and is less than the fourth thickness (S4). - Wherein, the first guiding unit (7) is another guiding chain (7), comprising a plurality of other guiding chain elements; and -The compensation unit (10) is a compensation chain, which includes multiple compensation chain elements.

10. The shielding device (1) according to any of the preceding claims, wherein, The sliding rod (11) includes a third guide channel (18) for guiding at least a variable portion of the compensation unit (10); the third guide channel (18) originates at a second end (13) of the sliding rod (11) and extends within the sliding rod (11) so as to at least partially slide and bend the variable portion of the compensation unit (10) when the sliding rod (11) is first operated. The compensation unit (10) is disposed on the opposite side of the second guide channel (17) relative to the first guide channel (16) so as to accommodate the second guide channel (17) or the third guide channel (18); Furthermore, when the second housing (42) is present and in a horizontal position, it includes: a fourth seat (63) extending longitudinally; and a fifth seat (64) extending longitudinally, identical to the fourth seat (63), wherein the fourth seat (63) and the fifth seat (64) are parallel to each other and are disposed on opposite sides of the shielding plane (21) so as to accommodate the compensation unit (10) in the fourth seat (63) or the fifth seat (64).

11. The shielding device (1) according to the preceding claim, wherein: - The second guiding unit (37) exists; - The second housing (42) is present and in a horizontal position, and also includes a sixth seat (65) for horizontally accommodating the second guide unit (37), wherein the sixth seat (65) extends longitudinally between the fourth seat (63) and the fifth seat (64), is parallel to the fourth seat and the fifth seat, and is longitudinally divided by the shielding plane (21).

12. The shielding device (1) according to any of the preceding claims, wherein, The shielding cloth (5) is selected from the group consisting of: insect-proof shielding cloth (5), shielding cloth (5) for at least partially blocking light, waterproof shielding cloth (5), curtain cloth, awning cloth, and waterproof shielding cloth (5) that is at least partially transparent to visible light.

13. The shielding device (1) according to any of the preceding claims, wherein, The first guide unit (7) includes a first groove (66), which faces the second end (13) of the sliding rod (11) when the second end (39) of the first guide unit (7) is disposed in the first guide channel (16). The compensation unit (10) includes a second groove (67), which faces the first end (12) of the sliding rod (11) when the second end (41) of the compensation unit (10) is disposed in the second guide channel (17). The synchronization unit includes: - The lower gear (68) is disposed in the sliding rod (11) and can mesh with the first groove (66); - The lower synchronous roller (69) is coaxial with the lower gear (68) and is fixedly connected to the lower gear; - Upper gear (70) is disposed in the sliding rod (11) and can mesh with the second groove (67); - The upper synchronous roller (71) is coaxial with the upper gear (70) and is fixedly connected to the upper gear; - Connecting element (218), which is annular and can be bent into a figure-eight shape, wherein the lower part of the connecting element (218) is located below the lower synchronous roller (69) and in direct contact with it, while the upper part is located above the upper synchronous roller (71) and in contact with it, so that the lower gear (68) and the upper gear (70) respectively mesh with the first groove (66) and the second groove (67), and when the sliding rod (11) rotates in opposite directions during the secondary operation, the connecting element (218) is stretched into a figure-eight shape and pulled along the path of the figure-eight shape.

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