ITMO20090282A1 - DEVICE FOR LOCKING AND / OR UNLOCKING A MOBILE ELEMENT - Google Patents

Description

Device to lock and / or unlock a mobile element

The invention relates to a device for alternatively locking and / or unlocking a movable element, in particular for alternatively locking and / or unlocking a handle-bar included in a roll-up anti-insect net frame, or mosquito net.

Roll-up mosquito nets are known, comprising a frame which can be mounted in correspondence with a window or French door.

The frame includes a fixed part, which is substantially shaped in the shape of an inverted "U" and includes a pair of uprights and a box, and a movable part, including a mobile bar, called "bar-handle". The uprights are mutually parallel and are fixed to the opposite jambs of the window, or French window, while the box is fixed horizontally to the lintel of the window, or French door, and is therefore arranged orthogonally to the pair of uprights.

A shaft is mounted inside the box, which is arranged parallel to the box and can rotate around its own longitudinal axis. A net or anti-insect sheet, shaped in the shape of a quadrilateral, is wrapped around the tree.

The upper edge of the net is fixed to the tree, the two opposite lateral edges are received in corresponding lateral guides, made in the uprights, while the lower edge is fixed to the handle-bar. The latter consists of a profile having a length equal to the distance between the two uprights and arranged parallel to the box. The opposite ends of the handle-bar are provided with protruding elements, or sliders, which are substantially shaped in the shape of a peg and can slide in the lateral guides of the uprights.

When a user moves the handle-bar vertically towards the window sill, or towards the door-window threshold, the sliders of the handle-bar slide in the guides and the anti-insect net is progressively unwound from the tree.

The handle-bar can be operated - that is, raised and / or lowered - by means of a small closed ring chain (not shown), made of plastic material and engaging a pulley mounted on one end of the shaft, or manually. In the latter case, the shaft is equipped with a return spring, which is loaded, i.e. compressed, when the user grabs and lowers the handle-bar towards the window sill, unwinding the anti-insect sheet and thus rotating the shaft in a first direction of rotation. When the user lets go of the handle bar, the return spring can extend freely, causing the shaft to rotate in a second direction of rotation, opposite to the aforementioned first direction. The anti-insect sheet is thus rewound on the tree and the handle-bar is dragged upwards, towards the box.

When the handle-bar is lowered until it rests on the sill, or on the threshold, the anti-insect net is completely unwound and completely occupies a space between the uprights, the box and the handle-bar. In this way, the mosquito net is in a â € œclosedâ € configuration, in which it can be crossed freely by air and light but prevents any insects (such as mosquitoes, flies) from crossing the open window or French door.

Locking devices are used to keep the roll-up insect screen in the closed configuration, i.e. to keep the handle-bar locked against the sill, or threshold. Each locking device is inserted at the lower end of a corresponding upright and consists of a base in which guiding means are made. The guide means comprise a series of side-by-side, straight and / or curved projections, defining a sort of â € œ obligatory pathâ € inside which the corresponding cursor of the handle-bar can slide until it reaches a stop position. An example of a locking device according to the prior art, comprising the aforementioned guide means, is shown schematically in Figure 12.

When the user lowers the handle bar, either manually or using the closed loop chain, each slider initially slides into the side guide of the corresponding upright. When the handle-bar reaches the sill or the threshold, each slider passes from the lateral guide to the guide means of the corresponding locking device and then slides inside the latter.

In this phase, the user must grasp and move the handle bar in order to allow and direct the sliding of the sliders in the guide means. Once the stop position in the guide means has been reached, the sliders lock, consequently blocking the handle bar against the sill or the threshold.

To unlock the sliders, the user must again grab the handle bar and move the latter so as to move the sliders away from the stop position. Once the sliders are unlocked, the user can let go of the handle bar, which is thus dragged upwards by the anti-insect sheet when the latter is rewound, thanks to the return spring of the shaft or through the closed loop chain.

A drawback of known locking devices is that, during the locking and / or unlocking step of the sliders, the user must be rather skilled in moving the handle-bar.

In fact, the sliders slide inside a substantially closed structure and their movement along the guide means cannot therefore be visually controlled by the user. The latter can only accommodate the sliding of the cursors, based on the greater or lesser resistance that the cursors (and therefore also the moving handle-bar) encounter along the more or less tortuous path defined by the guide means.

Consequently, if the user does not move the handle-bar sufficiently skillfully during locking and unlocking, these phases can be difficult. This can happen, for example, if the user is an elderly person.

Another drawback consists in the fact that the handle bar and / or the locking devices can break if the user abruptly or clumsily handles the handle bar during the locking or unlocking phase. Consequently, it is necessary to replace the handle bar and / or the locking devices, with a significant, and undesired, expenditure of money for the user.

It should also be noted that known locking devices require dedicated uprights, that is uprights having lower ends made in form coupling with the bases of the locking devices. This makes the fabrication of roll-up insect screen frames significantly more complex and therefore more expensive.

An object of the invention is to improve known locking devices for movable elements.

Another object of the invention is to improve the known locking devices for mosquito net handle bar.

A further object is to provide a device for locking and / or unlocking a mosquito net handle bar which allows the handle bar to be locked and / or released quickly and easily.

Yet another object is to provide a device for locking and / or unlocking a mosquito net handle bar in which the risk of breakage caused by sudden or clumsy movements of the user is substantially reduced.

According to the invention, a locking device is provided for alternately locking and / or unlocking a movable element, as defined in claim 1.

Thanks to the invention, a device is made available, suitable for locking and / or unlocking a mosquito net handle-bar, which is significantly easy to use and in which the risk of breakage caused by sudden or clumsy movements of the € ™ user. In fact, in the locking device according to the invention the slider is mounted on movable support means, which are connected in an oscillating way to the handle-bar. The movable support means, moving relative to the handle bar, allow the cursor to easily follow the path defined by the guide means.

Consequently, when the handle-bar is lowered by the user to the level of the sill, or the threshold, and the sliders pass from the lateral guides of the uprights to the guide means, the mobile support means accompany the sliding of the sliders along the means driving in a substantially automatic way.

Therefore, the user is no longer forced to intervene directly, skillfully moving the handle-bar to allow and direct the proper sliding of the sliders in the guide means.

In this way, the handle-bar can be locked quickly and easily, without the risk of accidental breakage caused by sudden or clumsy movements of the user. Furthermore, as will be explained below, the device according to the invention can also be effectively applied to apparatuses other than roller insect screens, such as for example shutters and roller shutters.

The invention can be better understood and implemented with reference to the attached drawings which illustrate some exemplary and non-limiting forms of implementation, in which: Figure 1 is an exploded, interrupted and incomplete perspective view of a frame of a roll-up mosquito net , equipped with a device according to the invention;

Figure 2 is an assembled, broken and incomplete perspective view of the frame of Figure 1;

Figure 3 is an enlarged perspective view of a device according to the invention, showing the mobile support means, on which the slider is mounted, and the corresponding guide means;

Figure 4 is a view like that of Figure 3, showing the cursor interacting with the guide means in an operating phase of the device;

Figure 5 is a view like that of Figure 3, showing the cursor interacting with the guide means in another operating phase of the device;

Figure 6 is a view like that of Figure 3, showing the cursor in the locked position;

Figure 7 is a view like that of Figure 3, showing the cursor in the unlocked position;

Figure 8 is a view like that of Figure 3, showing the cursor interacting with the guide means in a further operating phase of the device;

Figure 9 is a view like that of Figure 3, showing the cursor interacting with the guide means in a further operating phase of the device;

Figure 10 is a view like that of Figure 3, showing the cursor interacting with the guide means in a still further operating phase of the device;

Figure 11 is a schematic front view, showing a constructive detail of the guide means included in the device according to the invention;

Figure 12 is a schematic front view, interrupted and incomplete, showing the guide means of a locking device according to the prior art.

Figures 1 and 2 show a roll-up mosquito net 1, which can be installed near a window, or a French window, (not shown) and provided with a frame 2. The latter includes a mobile part and a fixed part and is made up of profiled elements made of a suitable rigid material, for example plastic or metal.

Frame 2 is provided with a pair of devices 15 (only one of which is shown in Figures 1 and 2), the structure and function of which will be described in greater detail below. The devices 15 are arranged to alternatively lock and / or unlock a movable bar or handle-bar 3 included in the frame 2.

In a version not shown, frame 2 is provided with a single device 15.

The fixed part of the frame 2 comprises the movable bar or handle-bar 3, consisting of a longitudinally extending profiled element having a substantially rectangular plan shape. From the handle-bar 3 a handle 3a departs, shaped in the shape of an elongated and curved sheet.

When the roll-up insect screen 1 is assembled and installed, the lower edge of an insect screen or net (not shown) is fixed to an upper edge 3b of the handle bar 3. When the roll-up insect screen 1 is in the closed configuration, a lower edge 3c of the handle bar 3, parallel and opposite to the upper edge 3b, rests against the window sill, or the threshold of the French door, where the insect screen is installed.

The fixed part of the frame 2 comprises a pair of uprights 4 (only one of which is shown in Figures 1 and 2) and a box 6.

Each upright 4 is constituted by a profiled element, having a substantially rectangular plan shape and able to be applied to a corresponding jamb (not shown) of the window, or French window. Each upright 4 has a cross section shaped approximately in the shape of a "U", defining a cavity 4a which faces the opposite upright 4 and inside which a lateral guide 5 is inserted.

Each lateral guide 5 is constituted by a profiled element, made substantially in shape coupling with the cavity 4a of the corresponding upright 4. Each lateral guide 5 has a cross section shaped approximately in the shape of a "U" and defining a cavity 5a which It faces the opposite side guide 5.

When the roll-up insect screen 1 is assembled and installed, a corresponding lateral edge of the anti-insect net is inserted and can slide inside the cavity 5a of each lateral guide 5.

Between the two mutually parallel uprights 4 is interposed the box 6, which is shaped approximately in the shape of a hollow parallelpiped and is applied to the architrave (not shown) of the window, or French window. In the box 6 there is a longitudinal slot 6a, which, in the assembled and installed insect screen 1, faces in the opposite direction to the lintel.

A cylindrical roller 7 is mounted inside the box 6, which is able to rotate around its longitudinal axis (not shown). When the roll-up insect screen is assembled and installed, the upper edge of the insect screen is fixed to roller 7 and the screen is wrapped around the latter. Through the slot 6a, the anti-insect net can enter or exit the box 6.

A bushing 8 is inserted in each of the two opposite ends 7a of the roller 7, which can be equipped with a return spring (not shown), for example a helical spring. The bushing 8 is mounted on a cylindrical shaft 9, comprising a base portion 9a which is shaped in the shape of a disc. A ring-shaped element 10 is fixed to the base portion 9a, made in form coupling with the base portion 9a. Overall, the base portion 9a and the ring element 10 form a sort of pulley, which can receive a closed ring chain (not shown). The shaft 9 and the ring element 10 are mounted inside a closing element 12, which closes, like a plug, a corresponding end 6b of the box 6. The closing element 12 is It is shaped in coupling with the cross section of the box 6 and is provided with a cover 11, interposed between the shaft 9 and the bushing 8. In a portion of the edge of the closing element 12 there is a slot (not shown), through which the closed chain can enter the closing element 12 and / or exit the latter.

The two opposite ends 6b, closed by the corresponding closing elements 12, are received in two fixing plates 13. Each fixing plate 13 is made in form coupling with the corresponding closing element 12 and can be anchored to the upper portion of the window jamb or French door, for example by screws or nails.

The upper end of each upright 4 is inserted inside a fastening element 14, which can be anchored to the jamb in the same way as the fastening plate 13. In the assembled and installed roll-up insect screen 1, the fastening element 14 is interposed between the underlying upright 4 and the overlying end 6b of the box 6. The box 6 and the uprights 4, i.e. the fixed part of the frame 2, are then kept in position near the corresponding window, or French window, respectively by means of the fixing plates 13 and fixing elements 14.

The roll-up insect screen 1 can be operated manually, ie by means of the return spring, or by means of the closed ring chain.

In the first case, the bushing 8 is equipped with the return spring, which is compressed and loaded when the handle bar 3 is manually lowered by a user. The lifting of the handle bar 3 is caused by the extension of the return spring.

In the second case, the bush 8 does not have the helical return spring and there is instead the closed ring chain, which is received in the pulley formed by the base portion 9a of the shaft 9 and by the ring element 10. By acting on the chain, the user can rotate the shaft 9, and therefore the roller 7, so as to alternately raise and / or lower the handle-bar 3.

In a version not shown, the roll-up insect screen 1 is equipped with both a return spring and a chain. In this way, it is possible to use the chain to lower the handle bar 3, simultaneously loading the return spring, and then exploit the relaxation of the return spring to cause the lifting of the handle bar 3.

Figures 3 to 11 illustrate the structure and operation of the device 15. For reasons of simplicity and clarity, the upright 4 and the handle bar 3 have not been shown in Figures 3 to 11.

With reference to Figure 3, the device 15 comprises slider means 16 and guide means 17, which, in the assembled roll-up insect screen 1, are mounted respectively on the handle-bar 3 and in the upright 4.

The device 15 is made of a suitable rigid material, for example plastic and / or metal.

The slider means 16 comprise movable support means 19, provided with a slider portion 18 and connected in an oscillating way to a portion of the slider means 16, that is to a fastening member 20 included in the slider means 16.

The fixing member 20 comprises a sliding portion 20a, shaped approximately in the form of a quadrilateral plate, and an anchoring portion 20b, made in the form of a profiled element and provided with a closing appendage 20e. The sliding portion 20a and the anchoring portion 20b are mutually aligned, while the closing appendix 20e is arranged transversely with respect to the two aforesaid portions.

When the roll-up insect screen 1 is assembled, the anchoring portion 20b is inserted by interlocking, and therefore blocked, inside the handle-bar 3, the sliding portion 20a is received, and can slide, inside of the side guide 5 of the corresponding upright 4, while the closing appendix 20e closes, like a plug, an adjacent smaller side of the handle-bar 3.

The movable support means 19 comprise a support element 19a, approximately shaped in the shape of a rectangular plate and provided with a hinged portion 19b. The latter is shaped in the form of a hollow cylinder, protrudes from one edge of the support element 19a and is arranged parallel to the aforementioned edge. In proximity to the margin (of the support element 19a) opposite the hinge portion 19b, there is a recess (not shown) in which the slider portion 18 is housed.

The slider portion 18 is shaped in the shape of a cylindrical rod and the corresponding recess of the support element 19a is made in coupling shape with the slider portion 18.

In a version not shown, the slider portion 18 is made as an integral part of the support element 19a, instead of being built separately and subsequently inserted into the support element 19a.

The support element 19a is connected in an oscillating way to the fixing member 20 by means of a pin 21 (shown in Figure 1), arranged parallel to the sliding portion 20a. The opposite ends of the pin 21 are received in corresponding sleeve elements 20c, 20d, mutually aligned and projecting from an edge of the sliding portion 20a of the fastening member 20. An intermediate portion of the pin 21 is inserted in the hinged portion 19b of the means movable support elements 19. In this way, in use, the support element 19a can oscillate around a longitudinal axis X, substantially coinciding with the longitudinal axis of the pin 21.

The guide means 17 comprise a guide element 22 and a fork element 23.

The guide element 22 is shaped in the shape of a â € œLâ € and includes a major branch 22a and a minor branch 22b, in which a recess is made (not shown).

The fork element 23 is provided with a fastening flap 23a (shown in Figure 1), which is made in perfect coupling with the recess of the minor branch 22b and is completely inserted in the latter when the guide means 17 are assembled.

When the roll-up insect screen 1 is assembled and installed, the guide means 17 are included in the lower end of the corresponding upright 4, and therefore in contact with the window sill, or with the threshold of the French window, equipped with the roll-up insect screen 1. The major branch 22a is housed inside the cavity 5a of the lateral guide 5, the minor branch 22b closes the cavity 5a below, like a plug, while the fork element 23 protrudes outside the cavity 5a and can receive the closing appendix 20b of the support means 16 and the adjacent end of the handle-bar 3. A face 22c of the major branch 22a is provided with a plurality of shaped elements 25, protruding from the face 22c . As shown schematically in Figure 11, the plurality of shaped elements 25 comprises a first shaped element 25a, a second shaped element 25b and a third shaped element 25c.

The first shaped element 25a comprises a convex surface S1 and is positioned at the end of the face 22c opposite the minor branch 22b.

The second shaped element 25b comprises a flat surface S2, a convex surface S5 and a concave surface S4. The flat surface S2 and the convex surface S5 are mutually opposite, while the concave surface S4 is interposed between the flat surface S2 and the convex surface S5.

The third shaped element 25c comprises a concave surface S3 and a flat surface S6. The third shaped element 25c is positioned in proximity to the minor branch 22b, the concave surface S3 facing towards the first shaped element 25a.

The second shaped element 25b is interposed between the first shaped element 25a and the third shaped element 25c.

The face 22c of the guide element 22, the plurality of shaped elements 25 and the adjacent areas of the lateral guide 5 together define a guide portion 24. The slider portion 18, supported in an oscillating manner by the movable support means 19, it can easily slide along the surfaces S1-S6 of the guide portion 24 during the upward or downward motion of the handle bar 3.

Unlike the known locking devices, and as described in detail below with reference to Figures 4 to 10, thanks to the device 15 it is no longer necessary to intervene by the user to move the handle-bar 3 in a suitable way. and to allow suitable sliding of the slider portion 18 along the guide portion 24. In fact, the slider portion 18 can slide substantially automatically thanks to the movable support means 19, that is, thanks to the support element 19a which it can freely oscillate around the longitudinal axis X, following the conformation of the surfaces S1-S6 of the guide portion 24.

When the user of the roll-up insect screen 1 moves the handle bar 3 according to a direction indicated by the arrow F1, i.e. when the user lowers the handle bar 3 (manually or by means of the chain), the slider means 16 slide according to the direction F1 inside the lateral guide 5 of the corresponding upright 4, until it reaches the level of the corresponding guide means 17.

While the handle-bar 3 continues to descend towards the sill, or threshold, the slider means 16 pass from the lateral guide 5 to the guide portion 24 of the guide means 17. In this step, the slider portion 18 initially slides along the convex surface S1 (Figure 4; Figure 11) and then on the flat surface S2 (Figure 5; Figure 11). The slider portion 18 can slide optimally along the surfaces S1 and S2 thanks to the movements of the support element 19a. The latter oscillates around the longitudinal axis X, following the conformation of the surfaces S1 and S2, while the slider means 16 move, following the handle-bar 3, in the direction F1 along the guide portion 24.

While the handle-bar 3 and the slider means 16 continue to move in the direction F1, the slider portion 18 completely traverses the flat surface S2 and reaches the subsequent concave surface S3 (Figure 11) of the third shaped element 25c, again thanks to the oscillating movements of the support element 19a.

Once the concave surface S3 has been reached, if the roll-up insect screen 1 is operated manually, the user can leave the handle-bar 3 free. inverse rotation of the shaft 9 and of the roller 7, the anti-insect sheet is partially rewound by dragging the handle-bar 3, and therefore the slider means 16, in a direction parallel and opposite to the direction F1 and indicated by the arrow F2. In practice, the handle-bar 3 is slightly raised towards the box 6, so that the slider portion 18 is moved (thanks to the oscillating movements of the support element 19a) from the concave surface S3 to the overlying concave surface S4 ( Figure 6; Figure 11) of the second shaped element 25b.

The slider portion 18 is thus in a locking position B (Figure 6), in correspondence with which the slider portion 18 is held against an approximately intermediate zone of the concave surface S4. When the slider portion 18 is in the locking position B, the handle-bar 3 is effectively locked against the underlying sill, or threshold, and the roll-up insect screen 1 is kept in the closed configuration, in which the anti-insect net It is completely unfolded.

If the roll-up insect screen 1 is driven by the chain, the movement of the slider portion 18 from the concave surface S3 to the concave surface S4 is obtained by acting on the chain so as to reverse the rotation of the roller 7. Consequently, the anti- insects is partially rewound by dragging the handle-bar 3 and the slider means 16 in the direction F2, i.e. towards the bin 6.

To release the handle bar 3 and raise the latter, so as to rewind the anti-insect net around the roller 7, the slider portion 18 must be moved away from the locking position B and slide - thanks to the oscillating movements of the Support element 19a - between a remaining portion of the concave surface S4 and the adjacent flat surface S6 of the third shaped element 25c, so as to reach an unlock position S (Figure 7; Figure 11). In the release position S, the slider portion 18 is free, i.e. it does not engage any of the surfaces S1-S6 of the guide portion 24.

The displacement of the slider portion 18 from the locking position B to the unlocking position S can be obtained in a different way according to the type of operation of the roller insect screen 1.

If the roll-up insect screen 1 is operated manually, the user holds the handle-bar 3 and lowers it slightly, ie moves it for a short distance in the direction F1. If the roll-up insect screen 1 is operated by the chain, the user acts on the latter in order to further lower the handle bar 3.

When the slider portion 18 is in the unlock position S, it is possible to rewind the anti-insect sheet around the roller 7 in order to raise the handle-bar 3 towards the box 6 and place the roller insect screen 1 in an open configuration .

If the roll-up insect screen 1 is operated manually, the user leaves the handle-bar 3 free, so as to allow a complete relaxation of the return spring of the bushing 8, the reverse rotation of the shaft 9, the rewinding of the net anti-insects around the roller 7 and the consequent lifting of the handle-bar 3 towards the box 6.

If the roll-up insect screen 1 is operated by means of the chain, the user acts on the latter in order to reverse the rotation of the roller 7, rewind the anti-insect screen and thus drag the bar-handle 3 towards the box 6. In both of the aforementioned cases, the slider means 16 are moved in the direction F2. Consequently, the slider 8 again engages the guide portion 24 and, thanks to the oscillating movements of the support element 19a, first slides along the convex surface S5 of the second shaped element 25b (Figure 8; Figure 9; Figure 11) and then on the convex surface S1 (Figure 10; Figure 11).

When the slider 8 has completely covered the convex surface S1, the slider means 16 moves away from the guide means 17. The slider means 16 and the guide means 17 are then again in the configuration shown in Figure 1.

From what has been described above, it is clear that the locking device according to the invention makes it possible to significantly reduce the intervention of the operator during the movement of the handle-bar of a roll-up insect screen.

In fact, regardless of the type of drive used for the roll-up insect screen (return spring; chain), the user is no longer forced to move the handle-bar with adequate skill to allow sliding, locking and unlocking of the sliders. .

This is because, in the device 15, the slider portions 18 can slide substantially automatically along the corresponding guide portions 24, thanks to the mobile support means 19 connected in an oscillating manner to the handle bar 3. Consequently, the risk is significantly reduced. breakage caused by sudden or clumsy movements of the user.

Furthermore, the size and shape of the plurality of shaped elements 25 and of the guide element 22, defining the guide portion 24, make the guide means 17 compatible with the dimensions and shape of the standard uprights. , without the need to build dedicated uprights. This makes it significantly easier, and therefore less expensive, to manufacture the frames for the roll-up insect screens.

Further variations and / or additions to what has been described above and / or what is shown in the attached drawings are also possible.

In particular, although the device according to the invention has been described with reference to a specific apparatus - ie a roll-up mosquito net - the structural and functional characteristics of the device allow it to be applied also to different types of apparatus.

It is therefore possible to realize further versions (not shown) of the device according to the invention, in which the slider means are mounted on movable elements different from the handle-bar of a roll-up insect screen.

For example, it is possible to mount the slider means on opposite end portions of the end strip of a window shutter or a shop or garage shutter, while the guide means can be mounted at the lower ends of the lateral guides of the shutter. or gate valve.

Similarly, it is possible to mount the slider means on opposite end portions of the end strip of a shutter included in a piece of furniture, for example a cabinet, while the guide means can be mounted at the lower ends of the lateral guides of the shutter.

Claims (16)

CLAIMS 1. Device (15) adapted to alternately lock and / or unlock a movable element (3), comprising slider means (16) and guide means (17) arranged to receive said slider means (16) in a sliding manner, said device (15) being characterized in that said slider means (16) comprise mobile support means (19) connected in an oscillating way to a portion (20) of said slider means (16) and provided with a slider portion ( 18). Device according to claim 1, wherein said movable support means (19) comprise a support element (19a) provided with a hinge portion (19b). 3. Device according to claim 2, wherein, in said support element (19a), a recess housing said slider portion (18) is provided. 4. Device according to claim 2, or 3, wherein said support element (19a) is shaped in the form of a rectangular plate. Device according to one of the preceding claims, wherein said guiding means (17) comprise a guiding portion (24) adapted to slidingly receive said slider portion (8). 6. Device according to claim 5 when dependent on one of claims 2 to 4, wherein said support element (19a) is able to oscillate around a longitudinal axis (X) passing through said hinge portion (19b) , so as to allow said slider portion (18) to be slidingly received in said guide portion (24). Device according to one of the preceding claims, wherein said portion (20) of said slider means (16) comprises a fixing member (20) arranged to be mounted on said movable element (3). 8. Device according to claim 5, or according to claim 6 or 7 when dependent on claim 5, wherein said guide means (17) comprise a guide element (22) provided with a face (22c) from which a plurality projects of shaped elements (25), said plurality of shaped elements (25) defining said guide portion (24). Device according to one of the preceding claims, wherein said movable element (3) comprises a handle bar (3) of a frame (2) of a roll-up insect screen (1). Device according to claim 9 when dependent on claim 8, wherein said guide element (22) is arranged to be inserted on an upright (4) of said frame (2). 11. Slider means (16) which can be incorporated into a device (15) according to one of claims 1 to 10, said slider means (16) being characterized in that they comprise mobile support means (19) connected in an oscillating manner to a portion (20) of said slider means (16) and provided with a slider portion (18). Slider means (16) according to claim 11, wherein said movable support means (19) comprise a support element (19a) provided with a hinge portion (19b). Slider means (16) according to claim 12, wherein, in said support element (19a), a recess housing said slider portion (18) is formed. Slider means (16) according to claim 12, or 13, wherein said support element (19a) is shaped in the form of a rectangular plate. Slider means (16) according to one of claims 12 to 14, wherein said support element (19a) is capable of oscillating around a longitudinal axis (X) passing through said hinge portion (19b). Roll-up mosquito net, comprising at least one device (15) according to one of claims 1 to 10 or slider means (16) according to one of claims 11 to 15.