EP2868842A1 - Device for locking a swimming-pool cover in an extended position - Google Patents

Abstract

Locking device in an extended position of a pool cover (2) (3), said cover (2) being movable between said extended position in which it covers the water (4) of the pool (3) and a retracted position allowing access to said basin (3), said locking device being characterized in that it comprises at least two complementary magnetic means, a first magnetic means (5) present at a wall (7) of said basin swimming pool (3), and a second magnetic means (6) arranged at an extremal portion of said cover (2), and that an attractive magnetic force is exerted between the two magnetic means (5) and ( 6) when they are arranged facing each other, said magnetic force being able to temporarily guarantee the locking of the swimming pool cover (3) in said deployed position, said device comprising means for canceling the magnetic force for p to allow the return of said cover (2) in the retracted position.

Description

TECHNICAL AREA

The invention relates to the field of pool covers and safety devices to prevent any incident, including drowning, when a user accidentally falls on such coverage deployed.

Such pool covers are in particular in the form of shutters or floating constituted by a plurality of juxtaposed blades and articulated relative to each other. Of course, the invention is not limited to this type of swimming pool covers but extends to any pool cover capable of both floating on the water surface of the pool, to protect people in the pool. fall, to avoid the cooling of the pond water during the night in particular, and finally to avoid pollution of the basin with external elements, such as leaves or insects in particular.

The invention relates more particularly to a locking device for immobilizing the cover in a deployed position above the pool pool. Such a locking device is also able to resist in case of accidental fall of a person on the surface of the cover.

PRIOR TECHNIQUES

A large number of swimming pool cover locking devices have already been described. Indeed, as described for example in the documents FR 2,877,681 and FR 2 906 554 it is known to maintain in position the last blade of a cover by means of a tongue or a rod penetrating into a locking device attached to the wall of the swimming pool.

However, such a locking device has many disadvantages. In particular, it does not allow to adapt to a variation of the level of the water line of the basin, produced by the evaporation of the water in particular. Such a device also requires equipping the pool cover with a specific extremal blade, which may require the pool cover to be removed when it is already in place. This also requires to report by screwing elements on the walls of the basin with the risk of leakage that implies.

Moreover, such a device requires manually actuate the locking device when the user wants to open the cover, which may be binding for the use of the user.

Thus, a first object of the invention is to achieve locking in a deployed position of a swimming pool cover, without generating significant change in the extreme portion of the cover.

A second objective is to allow locking the pool cover regardless of the height of the water line of the basin, adapting to a possible variation due to the evaporation of water, and whatever the position of the cover in the horizontal plane defined by the water line of the basin.

A third objective is to achieve the automatic unlocking of the extremal portion of the cover without requiring a manual action of the user.

SUMMARY OF THE INVENTION

The invention thus relates to a locking device in a deployed position of a swimming pool cover. Indeed, such a blanket is mobile by unfolding between this deployed position in which it covers the pond water and a retracted position allowing access to the basin.

According to the invention, the locking device is characterized in that it comprises at least two complementary magnetic means, a first magnetic means present at a wall of the pool basin, and a second magnetic means arranged at the level of an extremal portion of the cover, and in that an attractive magnetic force is exerted between the two magnetic means when they are arranged facing one another, such a magnetic force being able to temporarily guarantee locking the pool cover in the deployed position, the device having means for canceling the magnetic force to allow the return of the cover in the retracted position.

In other words, when the cover is fully deployed on the surface of the water, it comes into contact with at least one wall of the basin at its extremal portion. The locking device then generates an attractive magnetic force between two complementary magnetic means for holding the extremal portion of the cover against the wall of the basin. Such a locking device then prevents any relative movement between this extremal portion and the wall of the basin, and thus meets the requirements of the NFP-90 308 standard.

Such locking is done temporarily, because when the user wants to discover the pool, it then automatically actuates the means for canceling the attractive magnetic force exerted between the two magnetic means. The motorized means for retracting the cover can then be actuated.

It goes without saying that many variants for making such a locking device are conceivable.

For example, the first and second magnetic means may be of a similar or different nature. Indeed, and according to a first embodiment, the magnetic means integral with the wall of the basin or fixed may be formed of a ferromagnetic material and the magnetic means integral with the cover or mobile may be a permanent magnet.

In this embodiment, the nature of the first and second magnetic means is then different and it is the permanent magnet that exerts the attractive magnetic force on the ferromagnetic material. The part made with this ferromagnetic material can thus extend vertically facing the permanent magnet and thus ensures locking in the deployed position of the cover, regardless of the height of the line of water in the basin and regardless of the position of the cover in the horizontal plane defined by the water line of the basin.

According to a second embodiment, the fixed magnetic means may be a permanent magnet and the moving magnetic means may be a piece formed in a ferromagnetic material.

In this other embodiment, the nature of the first and second magnetic means is also different. The permanent magnet exerts the attractive magnetic force on the ferromagnetic material. This permanent magnet may be in the form of a magnetized plate positioned at the wall of the pelvis extending vertically opposite the ferromagnetic material. This arrangement also ensures the locking in the deployed position of the cover regardless of the height of the water line in the basin.

According to a third embodiment, the first and second magnetic means may both be permanent magnets.

In this embodiment, the nature of the first and second magnetic means is similar but the polarities of the two magnets opposite allow the magnetic attraction. Each permanent magnet exerts an attractive magnetic force on the other magnet of opposite polarity. As before, the permanent magnet positioned at the level of the wall of the basin can still extend vertically facing the second permanent magnet positioned at the extremal portion of the cover. This arrangement also ensures the locking in the deployed position of the cover regardless of the height of the water line in the basin.

According to a fourth embodiment, the fixed magnetic means may be an electromagnet.

In this case, the nature of the first and second magnetic means is also different. As long as it is not supplied with electricity, the core of the electromagnet exerts the attractive magnetic force on the second magnetic medium which can be a material ferromagnetic or a permanent magnet. When the user wishes to retract its cover, it then feeds the electromagnet into electricity which has the effect of canceling the attractive magnetic force. Such an electromagnet can thus play the role of the means for canceling the magnetic force to allow the cover to return to the retracted position.

Such an electromagnet can produce an attractive magnetic field extending vertically opposite the second magnetic means to ensure the locking in the deployed position of the cover, regardless of the height of the water line in the basin.

Conversely, the term electromagnet may also designate any other electromagnetic means consisting in making a ferromagnetic alloy magnetic during the passage within it of an electric current.

Moreover, such a locking device can be provided, and implemented, as soon as the construction of the swimming pool. It can also be reported later on an existing pool pool.

Thus, according to a first variant, the first magnetic means can be attached to a visible face of the wall of the basin. In this case, it is possible to equip an existing pool pool with the locking device.

According to a second variant, the first magnetic means may be integrated into the wall of the basin. In this case, the locking device is then provided and / or assembled at the time of construction of the basin. The first magnetic means can also be formed by the structure of the basin itself, when this structure includes panels or metal frames.

Moreover, the second magnetic means can also be attached or integrated into the extremal portion of the cover. When this second magnetic means is attached to the outer face of the extremal portion, it can then be advantageously movable so as to allow a depression of the cover due to a accidental fall of a person or a retracting movement of the cover prior to actuation means for canceling the attractive magnetic force.

Thus, according to a first embodiment, the second magnetic means can be movable relative to the extremal portion of the cover between a rest position in which the second magnetic means is in contact with the extremal portion of the cover, and a position remote in which the second magnetic means is spaced from the extremal portion of the cover.

Indeed, it may be advantageous to allow the second magnetic means to be removed from the extremal portion of the cover, particularly when the cover is deformed by the fall of a person. Indeed, the weight of the person deforms the blanket that sinks into the basin. This accidental deformation then has the effect of modifying the angular orientation and the position of the extremal portion of the cover. The second magnetic means then remains in contact with the first magnetic means while the extremal portion of the cover can pivot on itself.

It is also advantageous to allow the second magnetic means to be moved away from the extremal portion of the cover when the cover begins to retract and the magnetic force cancellation means are not yet activated.

Furthermore, in this case, the device may comprise resilient return means capable of repositioning the second magnetic means in the rest position relative to the extremal portion of the cover.

Thus, when the means for canceling the magnetic force are activated or when the person accidentally fallen on the cover is evacuated, the elastic return means then allow the second magnetic means to automatically find its rest position in contact with the extremal portion. cover. Such elastic return means are advantageously formed by rings or bands formed in an elastic material such as rubber or an elastic textile especially. Such a material is advantageously chosen as resistant to certain chemical compounds such as chlorine in particular.

In practice, the extremal portion of the cover may comprise at least one housing for receiving the second magnetic means arranged in the rest position.

Such a housing thus facilitates the return to the rest position of the second magnetic means and makes it possible to provide guide surfaces for the return to the rest position. The magnetic means can indeed support and translate relative to one of the guide surfaces forming the housing.

According to a second embodiment, the second magnetic means can be integrated with the extremal portion of the cover.

In this case, the second magnetic means is arranged inside the extremal portion and is stationary relative thereto. Such an arrangement is advantageous because it is then totally invisible to the user.

Advantageously, the means for canceling the magnetic force may comprise uncoupling means making it possible to separate the first and second magnetic means from one another.

Such uncoupling means then form material members able to transmit a tensile or torsional force to the extremal portion of the cover. Such uncoupling means can then be formed by the cover itself rotated by motorized means. In another variant, the uncoupling means may be separate material members of the cover and exerting a mechanical force directly on the second magnetic means and or on the extremal portion of the cover.

Thus, according to a particular embodiment, the uncoupling means may comprise at least one strap powered by a motorized member, the strap for exerting a tensile force on the second magnetic means.

In this case, the strap therefore acts directly on the second magnetic means and allows the magnetic force to be canceled by moving the first and the second magnetic means away from each other. Furthermore, the tensile force exerted by the strap can cause a relative pivoting movement of the second magnetic means relative to the first. Indeed, by cooperating the strap with a surface parallel to the direction of traction, the second magnetic means then pivots around an opposite edge. Such an arrangement makes it possible to form a lever arm, and consequently to facilitate the stall between the two magnetic means.

In practice, the motorized member may comprise a roller around which the cover wraps.

In other words, in this case, the motorized means for actuating the strap are merged with the roller around which the cover wraps. The rotation of the roller thus makes it possible both to cancel the magnetic force exerted between the two magnetic means and to displace the cover of the water surface of the basin.

Such a strap may according to various variants be heard above or below the cover in the deployed position. When the strap extends below the cover, it is advantageous to leave enough slack to allow deformation of the cover, especially due to the fall of a person, without causing an accidental power of the strap forming the uncoupling means for separating the first and second magnetic means from one another.

Other straps, secured to the roll around which the cover wraps, can then be used to wind the cover.

Advantageously, the uncoupling means may comprise an axis arranged parallel to the roller around which the cover wraps, the axis forming a bevel gear for guiding the strap.

In other words, the axis is used to guide the movement of the strap and allows him especially to transmit a tensile force to the second magnetic means without being hindered by the cover itself. Such a bevel gear axis then allows to position the strap above or below the cover without pressing or lift it when exerting the tensile force on the second magnetic means.

According to a particular embodiment, the device may comprise a support element for maintaining in the raised position the extremal portion of the cover near the water line of the basin. The support element then transmits a fraction of the weight of the extremal portion to the juxtaposed portion of the cover. In addition, the support element can also be combined with a floating element to ensure a substantially horizontal position of the extremal portion of the cover.

SUMMARY DESCRIPTION OF THE FIGURES

• La figure 1 est une vue en perspective d'un bassin de piscine équipé d'un dispositif de verrouillage d'une couverture de bassin de piscine, conformément à l'invention ;
• La figure 2 est une vue en coupe transversale selon une première variante d'un bassin de piscine ;
• Les figures 3 à 5 sont des vues en coupe transversale représentatives des mouvements relatifs entre une portion extrémale de la couverture et un second moyen magnétique agencé au niveau de celle-ci, conformément à l'invention ;
• La figure 6 est une vue de dessus d'une portion extrémale de la couverture, conformément à l'invention ;
• Les figures 7 et 8 représentent, quant à elles, des vues en coupe transversale, selon deux autres variantes, de portions extrémales de couverture de piscine, conformément à l'invention ;
• Les figures 9 et 10 représentent, quant à elles, des vues en coupe transversale de deux autres variantes de premier et second moyens magnétiques, conformément à l'invention ;
• La figure 11 représente, quant à elle, une vue en coupe transversale d'une portion extrémale de la couverture équipée d'un élément de soutien, conformément à l'invention ;
• Les figures 12 à 14 représentent des vues en coupe transversale, selon trois autres variantes à celle de la figure 2, correspondant à trois autres types de bassins de piscine pouvant être équipés d'un dispositif de verrouillage conforme à l'invention ;
• Les figures 15 et 16 sont de vue de dessus de la portion extrémale d'une couverture conformément à l'invention, équipé d'un témoin de verrouillage, montré dans deux positions distinctes.

The manner of carrying out the invention and the advantages which result therefrom will emerge from the description of the embodiment which follows, given by way of indication but not by way of limitation, in support of the appended figures in which:

• The figure 1 is a perspective view of a pool pool equipped with a locking device of a swimming pool cover, in accordance with the invention;
• The figure 2 is a cross-sectional view according to a first variant of a swimming pool;
• The Figures 3 to 5 are cross-sectional views representative of the relative movements between an extremal portion of the cover and a second magnetic means arranged thereon in accordance with the invention;
• The figure 6 is a top view of an extremal portion of the cover, according to the invention;
• The Figures 7 and 8 represent, in turn, cross-sectional views, according to two other variants, of extremal portions of pool cover, according to the invention;
• The Figures 9 and 10 represent, in turn, cross-sectional views of two other variants of first and second magnetic means, according to the invention;
• The figure 11 represents, in turn, a cross-sectional view of an extremal portion of the cover provided with a support member, according to the invention;
• The Figures 12 to 14 represent cross-sectional views, according to three other variants to that of the figure 2 , corresponding to three other types of pool pools that can be equipped with a locking device according to the invention;
• The Figures 15 and 16 are a top view of the extremal portion of a cover according to the invention, equipped with a locking indicator, shown in two separate positions.

MANNER OF REALIZING THE INVENTION

As already mentioned, the invention relates to a locking device in a deployed position of a swimming pool cover.

As shown in figure 1 , Pool 3 has a cover 2 movable in translation between an extended position and a retracted position, to give access to the water 4 contained in such a pool.

Furthermore, such a swimming pool 3 is equipped at one of its walls 7 with a first magnetic means 5 intended to cooperate with a second magnetic means 6 arranged at an extremal portion of the cover 2. Such complementary magnetic means 5 and 6 then make it possible to achieve locking in the deployed position of the cover 2. According to the invention, an attractive magnetic force is exerted between the two magnetic means 5 and 6 when they are arranged facing each other. from each other and at a certain distance. Such magnetic force guarantees the holding the cover 2 in the extended position , even during an accidental fall of a person on the surface of the cover 2.

According to a first embodiment, the magnetic force acting between the magnetic means 5 and 6 can be canceled by means of cancellation formed directly by the motorized means driving in rotation the roller around which the cover 2 is wound. In this case, a tensile force is exerted directly at the first and second magnetic means 5 and 6 during the rotation of the roller around which the cover 2 wraps.

As shown in figure 2 such a locking device may also comprise another variant of the means 10 for canceling the magnetic force. As shown, such cancellation means 10 may comprise a strap 11 tensioned by means of a motorized member 12. Such motorized member 12 is advantageously formed by a roller 14 around which the cover 2 is also wound.

Furthermore, these cancellation means 10 may also comprise an axis 13 arranged parallel to the roller 14 and forming a corner gear for guiding the webbing 11 in translation .

As shown in this embodiment, the roller 14 is of the submerged type. Thus, the axis 13 can be positioned at an upper edge of a partition wall 17 to protect access to the roller 14 and the motorized member 12.

Moreover, and as shown, the first magnetic means 5 can be formed in a ferromagnetic material and the second magnetic means 6 can be a permanent magnet. The locking in the deployed position of the cover is then performed automatically when the first and second magnetic means are positioned opposite one another. The magnetic force is then exerted automatically between the two magnetic means 5 and 6.

As shown in figure 3 , the second magnetic means 6 may be able to move in a translational movement relative to the extremal portion 8 of the cover 2. Such a movement may be advantageous in particular when ordering the opening of the cover 2. By Elsewhere, elastic return means 20 make it possible for them to reposition the second magnetic means 6 in a rest position with respect to the extremal portion 8 of the cover 2. In effect, such a second magnetic means 6 is then movable relative to at the extremal portion 8 of the cover 2 between a rest position in which the second magnetic means 6 is in contact with the end portion 8, and a remote position in which the second magnetic means 6 is spaced from the end portion 8 of the cover 2.

As shown in figure 5 , the tensioning of the strap 11 makes it possible to drive in rotation the second magnetic means 6 which then pivots with respect to the first magnetic means 5. Such a rotational movement then facilitates the cancellation of the magnetic force to allow the return of the cover 2 in the retracted position. Once the second magnetic means 6 is rotated, it can then easily separate from the first magnetic means 5 and return to its rest position in contact with the end portion 8, thanks to the elastic return means 20.

As shown in figure 6 , the extremal portion 8 of the cover 2 may be equipped with two second magnetic means 6 which, when they are arranged in the rest position, penetrate in housings 22 arranged inside the general bulk of the end portion 8.

Furthermore, each second magnetic means 6 can be repositioned in the rest position by two elastic return means 20 each positioned at one end of the second magnetic means 6. Such resilient return means 20 then go around the extremal portion 8 and guarantee the repositioning of the second magnetic means 6 inside the housing 22.

Moreover, and as represented in figure 7 , the extremal portion may also comprise a guide wing 21 for both supporting the second magnetic means 6, but also for guiding the movement in relative translation between this second magnetic means 6 and the extremal portion 8 of the cover 2. Indeed, when the cover is set in motion to proceed with its retraction, the second magnetic means 6 may temporarily remain in contact with the first magnetic means 5 integral with the wall 7 of the basin.

As shown in figure 8 and in another variant, the first magnetic means 15 may be a permanent magnet and the second magnetic means 16 a piece formed of ferromagnetic material. In this case, the second magnetic means 16 may advantageously be positioned inside the extremal portion 8 of the cover. There is therefore, in this case, no possible relative movement between the second magnetic means 16 and the extremal portion 8 of the cover.

Moreover, and as shown, the first magnetic means 15 can be integrated inside the wall 7 of the basin. It is then, advantageously, in this case, positioned at the rear of the material forming the wall 7 of the basin, such as a liner, or a polyester shell in particular.

As shown in figure 9 and in another variant, the first and second magnetic means 25 and 26 may both be constituted by permanent magnets of different polarity.

As shown in figure 10 the first magnetic means 35 may also be formed by an electromagnet for directly forming the magnetic force canceling means 10 . Indeed, the core of such an electromagnet attracts the second magnetic means 16 formed in a ferromagnetic material. Thus, when the user wishes to retract the pool cover, he actuates a control member adapted to supply electrical energy to the electromagnet 35, which allows to cancel the electromagnetic force exerted between it and the second means 16. The pool cover can then freely retract and roll on itself.

Moreover, and as represented in figure 11 , the device may also comprise a support element 30, secured at a lower face of a element 18 of the cover 2. Such a support element 30 then makes it possible to support the extremal portion 8 and to keep it close to the water line of the basin. Indeed, it may be useful to use such a support element 30 so as to avoid rotation of the extremal portion 8 towards the inside of the swimming pool. Such a rotational movement is in fact generated by the additional mass constituted by the second magnetic means 6 cooperating with a free stop of the extremal portion 8.

As represented in Figures 12 to 14 , the locking device according to the invention can equip different types of pool pools, including having different infrastructure to allow the winding of the pool cover on itself.

As shown in figure 12 such a locking device in an extended position of the pool cover can equip a cover for winding inside an above ground compartment forming a bench 40 above the basin. In this case, the motorized means 12 is integrated inside the bench 40 and may comprise the roller 14 around which the cover is wound and an axis 13 arranged parallel to the roller and positioned below the roller 14.

As shown in figure 13 , the cover 2 can also be wound on a roller 14 positioned on an aboveground gantry 50. Such a gantry 50 also makes it possible to support the axis 13, forming an angle gear for guiding a strap 11.

As shown in figure 14 such a device according to the invention can also equip a motorized submerged means positioned under a grating. Such a grating then makes it possible to form a step and is positioned below or flush with the water line of the swimming pool. An axis 13 is, in this case, positioned at the end of the grating 61 and also makes it possible to form an angle gear for guiding the strap 11. Moreover, and as shown in this figure, the grating is reported at the inner wall 62 for protecting the motorized means 12 positioned in a compartment 60 of the pool.

As shown, the cover 2 can be equipped at each of its ends with a second magnetic means 6. In this case, it is then possible to lock in the deployed position each of the ends of the cover 2 by exerting a force magnetic between each of the ends of the cover 2 and the wall facing said pool pool.

In this case, the strap forming the uncoupling means and the straps for carrying out the winding of the cover are chosen with a length adapted to allow a sequential unlocking, first on the side arranged near the roller, second on the side of the extremal portion of the cover and then allow the roll to be rolled up on the roll.

As illustrated in figure 16 , the flap 50 has a cutout 51 inside which is inserted the mechanism 52 which maintains a magnet 53 by means of elastic straps 54. The mechanism 52 comprises a locking indicator composed of a finger 61 able to slide parallel to the direction of movement of the shutter, inside a housing 62. The finger 61 is held in protruding position via a spring 63. In this way, at rest, the finger 61 protrudes from the end 64 housing, whose position is adjusted relative to the end 56 of the panel. The finger 61 has two marks 66, 67 , of different shape and / or colors. Both marks 66,67 are positioned on the finger 61 such that they alternately appear in the window 68. Thus, when the finger 61 is in the extended position, the mark 67 which is visible in the window 68 indicates that the portion extremity of the cover is not in contact with the basin 70. Conversely, as illustrated figure 16 when the element 53 interacts with the second magnetic means, for example the wall of the basin 70, the finger 61 is pushed inside the housing 62, compressing the spring 63. The opposite mark 66 thus appears in the window , showing a system lock. Of course, multiple alternative mechanisms can be envisioned for forming the lockout controls.

• il permet de procéder au verrouillage en position déployée d'une couverture de bassin existant ;
• il permet de s'adapter à une variation de niveau de la ligne d'eau à l'intérieur du bassin ;
• il est automatique et ne requiert aucune manipulation de l'utilisateur, de façon à procéder au déverrouillage et permettre la rétractation automatique de la couverture du bassin de piscine ;
• il est relativement simple et rapide à mettre en oeuvre, notamment sur tout type de couverture de bassin de piscine préexistant ;
• il permet une maintenance aisée puisque, dans certaines variantes, seule la portion extrémale de la couverture peut être remplacée en cas de défaillance du dispositif ;
• il est adapté à différentes configurations de bassin de piscine et notamment avec ou sans escalier.

It follows from the above that a locking device in an extended position of a swimming pool cover, according to the invention, has many advantages, and in particular:

• it allows locking in the deployed position of an existing pool cover;
• it makes it possible to adapt to a variation in the level of the water line inside the basin;
• it is automatic and requires no manipulation of the user, so as to unlock and allow the automatic retraction of the swimming pool cover;
• it is relatively simple and quick to implement, especially on any type of pre-existing swimming pool cover;
• it allows easy maintenance since, in certain variants, only the extremal portion of the cover can be replaced in the event of failure of the device;
• it is suitable for different pool basin configurations and especially with or without stairs.

Claims (15)

Locking device in an extended position of a pool cover (2) (3), said cover (2) being movable by unwinding between said extended position in which it covers the water (4) of the pool (3) and a retracted position allowing access to said basin (3), said locking device being characterized in that it comprises at least two complementary magnetic means, a first magnetic means (5, 15, 25, 35) present at the level of a wall (7) of said pool basin (3), and a second magnetic means (6, 16, 26, 36) arranged at an end portion (8) of said cover (2), and in that an attractive magnetic force is exerted between the two magnetic means (5, 15, 25, 35) and (6, 16, 26, 36) when they are arranged facing one another, said magnetic force being adapted to temporarily guarantee the locking of the pool cover (3) in said deployed position, said device tif comprising means for canceling (10) the magnetic force to allow the return of said cover (2) in the retracted position. Device according to claim 1, characterized in that said first magnetic means (5) is formed of a ferromagnetic material and said second magnetic means (6) is a permanent magnet. Device according to claim 1, characterized in that said first magnetic means (15) is a permanent magnet and said second magnetic means (16, 36) is formed of a ferromagnetic material. Device according to claim 1, characterized in that said first and second magnetic means (25) and (26) are permanent magnets. Device according to claim 1, characterized in that said first magnetic means (35) is an electromagnet. Device according to claim 1, characterized in that said first magnetic means (25) is attached to a visible face of said wall (7) of the basin (3). Device according to claim 1, characterized in that said first magnetic means (5, 15, 35) is integrated with said wall (7) of the basin (3). Device according to claim 1, characterized in that said second magnetic means (6, 16, 26) is movable relative to said extremal portion (8) of said cover (2) between a rest position in which said second magnetic means (6, 16, 26) is in contact with the end portion (8) of the cover (3), and a remote position in which said second magnetic means ( 6, 16, 26) is spaced from the extremal portion (8) of the cover (2). Device according to claim 8, characterized in that it comprises elastic return means (20) able to reposition the second magnetic means (6, 16, 26) in said rest position with respect to the end portion (8) of the cover (2). Device according to claim 8, characterized in that said end portion (8) of said cover (2) comprises at least one housing (21) for receiving said second magnetic means (6, 16, 26) arranged in said rest position . Device according to claim 1, characterized in that said second magnetic means (36) is integrated with said end portion (8) of said cover (2). Device according to claim 1, characterized in that the means (10) for canceling the magnetic force comprise uncoupling means (11, 12, 13, 14) enabling the said first and the second to be separated from each other. second magnetic means (5, 15, 25) and (6, 16, 26, 36). Device according to claim 12, characterized in that said uncoupling means comprise at least one strap (11) tensioned by a motorized member (12), said strap (11) for exerting a traction force on the second means magnetic (6, 16, 26, 36). Device according to claim 13, characterized in that said motorized member (12) comprises a roller (14) around which the cover (2) is wound. Device according to claim 14, characterized in that said uncoupling means comprise an axis (13) arranged parallel to the roller (14) around which the cover (2) is wound, said axis (13) forming a return of angle for guiding said strap (11).

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