EP2690998A1

EP2690998A1 - Reversibly extendible bathtub

Info

Publication number: EP2690998A1
Application number: EP12715172.8A
Authority: EP
Inventors: Michele LASTELLA
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-29
Filing date: 2012-03-20
Publication date: 2014-02-05
Also published as: WO2012131535A1; ITRM20110163A1

Abstract

The present invention describes a rigid, extendible bathtub. Said bathtub will be substantially constituted by three rigid elements: a fixed element(10), a slidable element (30) and an extension element (20) capable of being placed inside the thickness of said fixed (10) and slidable (30) elements. The extendible bathtub that is the object of the present invention proposes a system that is reversible and quick for varying the width dimension,characterized by the exit of the extension element (20) which becomes visible and usable following the lateral sliding, exerted by the user, of the slidable element (30); in such a manner, said extension element (20) can in turn slide on a pair of parallel tracks, so as to extend the width of said tub. The present invention describes and claims a bathtub whose width can be reversibly varied, passing from a closed configuration, which is naturally narrower, to an open configuration in which said bathtub is wider and usable by two people simultaneously with extreme comfort.

Description

"Reversibly extendible bathtub"

Description Field of the art

The present invention has as object a rigid, width-extendible bathtub, due to a single- dimensional modulation system characterized by the presence of at least one extension element that, when not in use, is hidden inside the fixed and slidable portions; such bathtub is equipped with at least one system of parallel tracks that allow the sliding of said movable extension element, in a manner so as to allow the enlargement of said bathtub.

The abovementioned system belongs in the field of interior furnishing and especially in the field of bathroom furnishing.

Prior art

The bathtub is a recipient ideated to contain the water used for cleaning and washing operations. The first rudimental bathtub models were made of stone, metal, and then wood; such models were very simple and not very comfortable, as they were essentially adapted for performing washing operations.

Starting in 1900, there was a clear change of customs and lifestyles; the technological evolution determined an improvement of society's hygienic conditions, with a consequent change of habits and customs. The bathtub became an object intended not just for simple washing operations, but also for transmitting psycho-physical relaxation sensations to the user.

At the same time, in line with the change of habits and society, the concept of the home was redefined. From large-volume homes with high ceilings, wide spaces and numerous rooms, a new concept of the home is now observed: increasingly smaller, with compressed volumes, adapted to meet the need for technology, comfort and consumer goods availability in small spaces. The reduced availability in terms of volume of modern homes has however caused disaffection with regard to an ancient yet very useful object: the bathtub. Other, much quicker washing systems have been preferred, which allow the occupation of a smaller space: the "shower" for example.

At the same time, new bathtub models have been ideated which can be inserted in volumes that are quite small, due to particular designs and shapes.

Thus, bathtubs were created with the most wide-ranging shapes with respect to classic models: oval, hexagonal, octagonal, rotund, angular and compact bathtubs that can even be inserted in limited spaces. Nevertheless, these new forms, even if they allow reconsidering the use of an ancient, pleasant object like the bathtub, when installed in homes with limited volumes do not always allow the perfect relaxation of body's muscles; in most cases, such forms do not allow extending legs, and consequently do not allow relaxing the spinal muscles.

The patent WO 79/00790 describes a bathtub system hidden below the unit constituted by the sink, in order to obtain a substantial space savings. A first part of such tub would be fixed below the sink, the second part would be joined on the same level as the first due to an overturning mechanism. Such patent always refers to a single tub.

The patent WO 01/01832 instead describes a bathtub system hidden inside the shower-sink unit, equipped with an extension system constituted by a first portion fixed below the sink and a second portion slidable inside the fixed portion which is adapted to occupy the space inside the shower.

Finally, the patent WO 2004/037058 describes a telescopic extension system in which the walls of the fixed element contain the other two extension elements which, by sliding on each other, determine a single-dimensional variation of the tub size.

All of the aforesaid patents propose non-telescopic extension models, or as in the patent WO 2004/037058, telescopic models that however indiscriminately use a system whose extension elements are not completely hidden. In each case, these systems intend to extend the tub only with regard to the length thereof, proposing single bathtub models that are not very comfortable since they can only be extended a small amount. Description

The present invention refers to a bathtub that is reversibly extendible with regard to width, in which the rigid extension element is completely hidden inside the thickness of the first fixed portion and the thickness of the movable portion. The present invention describes a reversibly extendible bathtub, i.e. one that is extendible and reversible with regard to the width thereof.

Such reversible dimensional modulation system consists of a mixed system, both fitting and telescopic, in which the extension element is perfectly fitted inside suitable housings and exits outward therefrom when necessary, with a telescopic sliding system.

The present invention describes a double bathtub, for two simultaneous users, which however can then easily be narrowed until it reaches dimensions that are even less than those of a common rectangular bathtub.

The present invention claims a bathtub that is reversibly extendible with regard to width, equipped with at least one rigid extension element that allows obtaining an enlargeable tub, up to the obtainment of a double bathtub with rectangular shape.

Said tub preferably has standard rectangular shape; such shape is the most comfortable form, since it allows a complete relaxation of the body's muscles, in particular of the leg and back muscles, at the same time optimizing the spaces available inside the bathroom.

The extendible tub, object of the present invention, has other important advantages. The enlargement system equipped with rigid extension elements allows, when said tub is not in use, putting said tub back into a minimum space, even less than that of a standard rectangular tub. The enlargeable bathtub that is the object of the present invention indeed allows arranging an authentic double bathtub, when said tub is completely extended, or a simple bathroom furnishing piece, when said extendible tub is completely retracted and closed. The bathtub that is the object of the present invention, when completely open, allows the use of said tub even for more than one user simultaneously; in this case, the users can comfortably divide the tub, without being crammed together, allowing both users to achieve complete body relaxation.

Therefore, said tub has the advantage of offering a completely comfortable experience even to more than one user, as well as complying, once reclosed, with the needs of modern design centered on occupying extremely limited volumes.

Brief description of the drawings

The present invention will be described in detail by making reference to the enclosed figures which illustrate several particular embodiments thereof, which are to be considered merely illustrative and entirely non-limiting of the effects of the present patent application, in which:

FIGURE 1 : is a top, exploded and transparent axonometric view of the bathtub according to the invention, in which the three fundamental modular elements are highlighted: the fixed element 10, the extension element 20 and the slidable element 30. Also observed is the seat 150 of the extension element 20, the two wheels 55 placed underneath the lower end of the slidable element 30 and the rails 300 on which the movable element 30 slides. FIGURE 2: is a top axonometric view of the first embodiment of the invention; in this figure, the bathtub is in its closed configuration and the fixed element 10 and the slidable element 30 are observed. Also visible are the drain 57, the handle 40 adapted to facilitate the extraction of the slidable element 30 and the locking handles 50 which allow the coupling of the slidable element 30 when the tub is in enlarged configuration. In addition, one observes the wheels 55 which facilitate the sliding of the movable element 30.

FIGURES 3, 4, 5 show the lifting system placed on the lower part of the extension element 20. The system is illustrated in three positions of: completely lowered (Figure 3), partially raised (Figure 4), raised up to the abutment point 35 (Figure 5) which places it at exactly the same height as the fixed element 10 and the slidable element 30, giving rise to the flat bottom of the tub. The bracket 21 is observed, as is the connection hinge 24 between the bracket 21 and the lower side 22 of the extension element 20. Also observed is the lower end 23 of the bracket 21 which is hinged on the element 35.

FIGURE 6: is a view in which one observes the extension element 20 (dashed line) anchored on the lower part by means of the brackets 21 to the two parallel transverse elements 35 that act as abutment elements for the brackets 21, such elements 35 connected with the telescopic rails 302 in a manner so as to slide along them, so as to allow the extraction of the extension element 20 from the thickness of the fixed element 10.

FIGURE 7: is a perspective view of the kinematic mechanisms of the element 21 connected on the lower part with the crossbar 35, on which it terminates its rotation. Also observed is the lower part 22 of the extension element 20, to which the elements 21 are anchored. Also noted are the contact points that are slidable, due to a common mechanism, between the crossbar 35 and the telescopic rails 302.

FIGURE 8: shows the sequence of the three separate steps 8a, 8b, 8c, which illustrate the mechanism for opening the locking handle 50. Also observed is the locking handle 50 and the cable 51, which cross the thickness of the movable element 30.

FIGURE 9: are three separate views of the tub according to the present invention when organized in closed configuration and equipped with closure cover that can be put back on the rear side of the fixed element 10. The cover is shown closed in Figure 9a, during the opening step in Figure 9b and in completely open position in Figure 9c.

Description of the invention The present invention refers to a reversibly enlargeable bathtub, characterized by a single- dimensional extension system adapted to transform said bathtub from a simple bathroom furnishing piece equipped with closure cover, when configured in closed position, into a wide bathtub capable of receiving one or preferably two people at its interior, when completely enlarged.

An embodiment of the present invention is reported hereinbelow, in which the enlargement system is underlined. Such system characterized by having at least one fixed element 10, one movable element 30 and one extension rigid element 20 partly contained, when not in use, inside the thickness of the walls of the fixed element 10 and partly inside the thickness in the walls of the movable element 30; all this due to the aforesaid suitable recess 150.

When not in use and therefore configured in closed position, the bathtub that is the object of the present invention allows considerably narrowing the width thereof, reaching a size such to appear to be a small furnishing piece, with minimum thickness limited to only 39 centimeters, whereas the length and the height remain entirely unchanged and hence are analogous to that of a common bathtub. When configured as a furnishing piece, given that it is equipped with cover with vertical opening, the tub that is the object of the present invention can be used as a cloth/clothes stand container. The furnishing piece that encloses the bathtub that is the object of the present invention therefore contains, at its interior, an invisible and reversible system for dimensional modulation, which during opening allows extracting (from its interior) a bathtub with size such that it can be used by one or preferably two people with maximum comfort and total safety.

The comfort will be increased by the addition of a chro mo therapy system, characterized by a system of LED lamps positioned on the fixed element 10 and possibly enhanced by the transparency of the plexiglass of the extension element 20, together with the use, on the single fixed element 10, of a plurality of water and air jets adapted to create a hydro- massaging effect when activated.

The shape of said furnishing piece, when the bathtub is in closed position, is substantially a rectangular parallelepiped and on the top part it can be closed with a cover that can also act as an object holder. Alternatively, the upper face of said cover can be covered with a lattice or sponge mattress, so as to act as a comfortable seat or small bed. The dimensional modification is tied to specific technical solutions described hereinbelow, adapted to allow the facilitated sliding of the elements 20 and 30, when one intends to use said tub in enlarged configuration.

The system that is the object of the present invention allows arranging a double bathtub, where normally there is room for a single bathtub, and in addition it allows further reducing the space occupied by said tub when it is in closed configuration, as it assumes the shape of a long, narrow furnishing piece, positioned along one wall of the bathroom itself. Naturally, the wider the bathtub in the open configuration, the less narrow said furnishing piece will be in closed configuration. A bathtub 110 centimeters wide will give rise to a furnishing piece that is about 55 centimeters wide. The height and the length will instead remain unchanged. The bathtub according to the present invention will now be described. Such bathtub is equipped with an extension system that is invisible, safe, quick and reversible, which allows said bathtub to be extended from the dimensions of 170 centimeters length x 55 centimeters width x 55.5 cm height, to the dimensions of a bathtub usable for two people: 170 centimeters length x 110 cm width x 55.5 cm height. Naturally, other size combination possibilities are possible, e.g. 170 cm length x 39 cm width x 55 cm height, capable of giving rise to a single tub of 170 cm length x 70 cm width x 55 cm height size. Naturally, the fixed dimensions - the length and the height of the tub - can be selected as a function of the available space and the user's desires, and they are not at all binding for the actuation of the present invention.

The present invention will consequently have a "closed" configuration, much less bulky, and an "open" configuration in which said bathtub reaches its maximum width. The transformation of the bathtub, whether this is single or double, into a bathroom furnishing piece allows compacting said tub into an original furnishing element with width about half the maximum width of said tub. The aforesaid tub, in its "closed" configuration, is constituted by two solid shells with mirrored dimensions: the fixed element 10 and the movable element 30. Said two mirrored halves 10 and 30, when said tub is in closed position, are maintained joined together by at least one pair of suitable hooks 49 (not shown), placed near their contact edge, in a manner so as to stably maintain the two mirrored halves in close contact with each other. These hooks, when engaged, cause the locking of the tub in its closed configuration. Once stably closed, the bathtub obtained according to the invention can be covered on the top by an openable cover, so as to make it appear as a simple furnishing piece, a small bed or an object holder shelf. By releasing said hooks 49 (not shown), one obtains the disengagement of the two mirrored halves 10 and 30; with the tub empty, this disengagement makes it possible to externally slide the movable element 30 of said bathtub. The tie rods 51, which have one end firmly anchored inside the fixed element 10, reach their maximum extension once said tub is completely open; due to the traction exerted by the use of at least one pair of locking handles 50, one obtains the compression of the movable element 30 against the extension element 20 which in turn presses against the fixed element 10. These compressions allow the stabilization of said tub in its enlarged or open configuration.

The open configuration of the bathtub, object of the present patent application, is obtained when the fixed portion 10 and the slidable portion 30 are moved away from each other in order to allow the enlargement of said tub by means of the insertion of the suitable extension element 20.

The closed configuration is instead attained at the end of the bathtub narrowing step, giving rise to the aforesaid furnishing piece in closed configuration; in particular, the operation is concluded with the engagement of said hooks 49 (not shown).

The perfect hermetic closure of said tub in the closed configuration will be verified with the precise joining of the two portions, the fixed portion 10 and the slidable portion 30, i.e. when said hooks 49 firmly lock the two portions 10 and 30 together.

The locking handles 50 are instead used for locking the tub, object of the present invention, in its completely open configuration. The locking handles 50 are connected to a pair of cables 51 which run through the entire thickness of the movable element 30, and are firmly fixed on the wall or on the inner face of said fixed element 10. Said cables 51, being tightened due to the locking handle 50, compress the three elements, 10, 20 and 30, which constitute the tub in its open configuration. The rewinding of said cables 51, at the time of closure of the tub, occurs by means of a classic system of automatic rewinding around a reel placed in the recess 90. The opening, i.e. the sliding towards the outside of the movable element 30, occurs due to the traction exerted by the user, acting on the handle 40, on the movable element 30. Such traction terminates when the supports, which allow the movable element 30 to slide on the telescopic portion 302 of the rails 300, are stopped on the respective end stops. Then, by using the two handles 140, the user extracts the extension element 20, which by sliding on the underlying tracks 300 or extensions 302 will be stopped at a predefined abutment point, triggering the subsequent rotation of the elements 21 until they are stably abutted against the tilted element 35. The rotation of about 135° of the elements 21 allows the elevation of the entire extension element 20, which will come to be situated at exactly the same level as the fixed element 10 and the movable element 30.

The opening steps for the tub, object of the present invention, are therefore the following:

(a) Disengagement of the hooks 49 (not shown), which allow the unhooking of the pair of hooks that maintain the two halves 10 and 30 of the tub in closed configuration.

(b) Sliding of the slidable portion 30 towards the outside, due to the aid of the handle 40 and at least one pair of telescopic tracks 302 stably anchored to the lower face of the movable element 30, given that such tracks 302 are capable of exiting outward and re-entering inside the fixed tracks 300, these too placed below said movable portion 30.

(c) Extraction of the extension element 20 from the slit 150 partially inserted inside the fixed element 10 and the movable element 30. Said extraction is facilitated by the presence of the two handles 140, placed at the top of the two edges of the extension element 20, which allow the user to have an easy grip of said extension element 20 in a manner so as to extract it and make it slide towards the outside, i.e. towards the movable element 30 previously made to externally slide as described in point (b). (d) The extension element 20 is connected on the lower part with at least one bracket 21, preferably a pair of brackets 21, hinged in their upper side 24 to the center of the lower face 22 of the extension element 20. The other end 23 of the brackets 21 is instead directly hinged on the lower portion of the plate 35. Said plate 35 is a solid and stable element, tilted 45° with respect to the plane constituted by the tracks 300, adapted to transversely join the two tracks 300 or 302 which in their entirety constitute the slidable telescopic portion of the fixed tracks 300. Said plate 35 structurally constitutes the abutment surface, i.e. the stop point, of the brackets 21 rotation. When extracted from its seat 150, the extension element 20 will then begin to slide towards the outside, enlarging the tub, due to the action of the telescopic tracks 300/302; then, once it has completely exited from its seat 150 and reached its abutment point, the extension element 20 will stop its lateral extraction, and will begin to be raised due to the action of the brackets 21, which by rotating around the axis 23 will stably abut against the tilted plate 35. This rotation of about 135° causes the elevation of the extension element 20 until it is stably brought to a height analogous to that of the fixed element 10 and the slidable element 30. This double movement of the extension element 20, first with lateral sliding and then elevation, allows the internal surface of the extension element 20 of the bathtub, object of the present invention, to be perfectly level with the fixed element 10 and the slidable element 30, giving rise to a perfectly smooth tub that totally lacks internal steps.

(e) Once the elevation of the extension element 20 has terminated, the slidable element 30 is thrust, along the telescopic tracks 302 to which the lower part thereof is connected, until its inner side presses against the outer side of the extension element 20. The extension element 20, under the thrust of the slidable element 30, in turn presses against the fixed element 10 which is firmly anchored to the wall or to the floor. Between the single components 10, 20 and 30, at least one gasket is provided which allows the hermetic seal of the junction surfaces when they are pressed against each other. In addition, it is possible to provide the contact surfaces with a male/female profile in order to obtain a fitting of the elements 10, 20, and 30 that is perfect, quick and airtight. (f) The pair of stop handles 50 will ensure the correct tightening of the cables 51 in a manner so as to maintain the three elements 10, 20 and 30 pressed and in stable contact with each other. This is made possible due to at least one tie rod 51, preferably a pair of tie rods 51 provided with suitable length, and at least one locking handle 50, preferably a pair of locking handles 50 adapted to compress, by means of said tie rod 51 , the movable element 30 against the extension element 20 and the fixed element 10. This compression, together with the presence of the gaskets, creates the airtight seal of the tub, object of the present invention, when configured in open position.

In order to facilitate the sliding and the distribution of the load, at the lower lateral margins of the movable element 30, at least one pair of recessed wheels 55 are provided that are adapted to slide on the floor.

The modifications of the width of the bathtub according to the present invention only occur due to the extension element 20.

Said extension element 20, in the closed configuration of the bathtub, is completely invisible since it is contained in the seat 150 obtained in the lower thickness of said bathtub and in particular inside the thickness of the fixed element 10 and the movable element 30.

The extension element 20 only causes the modification of the width of the tub.

In the "closed" configuration of the bathtub, said extension element 20 of Figure 2 completely re-enters the suitable housing 150 obtained inside the thickness of the fixed portion 10 and the slidable portion 30.

Said housing 150 is made in a manner such that at least half of the extension element 20 is contained inside the housing 150 obtained in the fixed portion 10 and the remaining part inside the opposite counter-lateral housing 150 obtained in the slidable portion 30. This allows hiding the entire the extension element 20, when the tub is in its closed configuration. In order to reconfigure the tub, object of the present invention, in the closed configuration, it is therefore sufficient to follow the aforesaid steps in reverse order. The closing and opening are in fact quick and reversible actions, to be carried out however with the tub completely empty and preferably dry. The fixed tracks 300 have the upper portion fixed to the lower face of the tub; they are composed of at least one pair of parallel tracks made of stainless steel or of any other suitable solid material, such as a plastic material or metal alloys, and they enclose the extension elements 302.

The fixed element 10 can be self-supporting, it be anchored to any one wall or it can be equipped with a load-bearing structure constituted by at least one pair of "L"-shaped elements fixed to the walling of the bathroom; or said "L"-shaped elements can have only the horizontal portion, coinciding with the tracks 300 which are set on the ground and are possibly anchored to the ground via their lower face. Said horizontal portion can be equipped with a slight slope of 1% in order to make the water converge in the fixed element 10, where the drain 57 is present.

Once the use of the bathtub has terminated, in order to return to the "closed" configuration, the extension element 20 is once again rotated, but this time downward, in order to be aligned with the housing 150 and then re-enter the housing 150 placed in the thickness of the fixed 10 and movable 30 portions. This allows the perfect embedding of the extension element 20 in the lower layer of the tub, determining the consequent hiding thereof and allowing the closure step of said bathtub.

Said extension element 20 will be made of any one polymer or plastic material, even of "corian" type, or more preferably of any one transparent material of "plexiglass" type; the transparency of the latter allows making full use of the relaxing properties of this bathtub.

The element 10 can have a system of LED lamps 500 of red-green-blue type, usable for chromotherapy. The element 20 and the element 30 can be obtained in "plexiglass", glass or any other transparent plastic polymer.

The start and end of each opening and closing step of the bathtub, object of the present invention, is made possible by the unhooking and hooking of the hooks 49.

Said hooks 49 are safety systems for ensuring the closure of the system when it is in the "closed" configuration of the bathtub.

During opening, said hooks 49 are naturally unhooked and left free. After the sliding towards the outside of the extension element 20 and after the correct position of the three components 10, 20 and 30 has been reached, the front locking handles 50 are closed, in a manner such that said tie rods 51 are tightened and locked. Such tightening/locking is ensured by the asymmetric profile of such handles, which does not allow undesired chance rotations when the tub is full of water. In addition, at the time of closure, there is a strong squashing of the gaskets placed along all the profiles of the elements 10, 20 and 30, in a manner so as to obtain a correct hermetic closure.

The materials used for the present invention will all be synthetic or natural polymer materials, metals or alloys thereof.

The present invention of course must not be considered limited to the specific embodiments described herein, but it obviously extends to all those combinations that are equivalent or deemed obvious, with regard to technical aspects, for a man skilled in the art.

In addition, in the preceding description, some details may have been omitted which would be obvious for a man skilled in the art with regard to the actual obtainment of the invention, and therefore they would not contribute to further clarifying essential and innovative aspects of the present invention.

In conclusion, even if only some materials were mentioned for the obtainment of some components, this clearly does not imply any actual limitation, given that equivalent and compatible materials could be used with the required physical, geometrical requirements. Alternatively, the entire kinematic mechanism can be motorized with a common electric or electro-hydraulic motor placed inside the fixed element 10.

Claims

1. Reversibly enlargeable bathtub constituted by at least one fixed element (10), one movable element (30) and one extension element (20) adapted to be hidden by returning in the housing (150) obtained inside the thickness of the fixed element (10) and in the housing (150) obtained inside the thickness of the movable element (30) and said tub being equipped with at least one pair of parallel tracks (300) situated on the lower side of the fixed element (10) and the movable element (30), enclosing at least one telescopic portion (302) fastened to the lower face of the movable element (30), adapted to allow the lateral sliding of said movable element (30) on top of said telescopic tracks (302), in a manner so as to also allow the lateral sliding of the extension element (20) which is stopped due to at least one abutment element (35), connected to said tracks, adapted to allow the element (21) to be stopped and then to rotate about 135° around its own base due to the articulations (23) and (24) respectively present on the upper and lower ends of said element (21), said articulations being respectively connected with the rails (300) and with the lower face (22) of the extension element (20), in a manner such that said extension element (20), due to the aforesaid 135° rotation, comes to be situated at the same height as the fixed element (10) and the movable element (30); once they are positioned next to each other, the three elements (10), (20) and (30) are integrally fixed to each other due to the pressure exerted by at least one tie rod (51), preferably a pair of tie rods (51), tightened due to at least one locking handle (50), preferably a pair of locking handles (50). 2. Reversibly enlargeable bathtub according to claim 1, whose closed configuration is stabilized by at least one locking hook (49, not shown) capable of firmly joining the fixed element (10) and the movable element (30). Reversibly enlargeable bathtub according to each of the preceding claims, characterized in that it has at least one gasket between the elements (10), (20) and (30) so as to result stably watertight when arranged in open configuration or in closed configuration.

Reversibly enlargeable bathtub according to each of the preceding claims, characterized in that it has a substantially rectangular form.

5. Reversibly enlargeable bathtub according to each of the preceding claims, characterized in that it has minimum size of 170x39x55.5 centimeters in the "closed" configuration and 170x70x55.5 centimeters in the "open" configuration.

6. Reversibly enlargeable bathtub according to each of the preceding claims, characterized in that it has minimum size of 170x70x55.5 centimeters in the "closed" configuration and 170x138x55.5 centimeters in the "open" configuration.

7. Reversibly enlargeable bathtub according to each of the preceding claims, is made of any synthetic or natural polymer material, of any one metal or alloys thereof.

8. Reversibly enlargeable bathtub according to each of the preceding claims, characterized by the presence of at least one extension element (20) made of any synthetic or natural polymer material, more preferably made of transparent polymer material such as plexiglass.

9. Reversibly enlargeable bathtub according to each of the preceding claims, characterized in that it has, on the fixed element (10), a system of LED lamps (500) for chromotherapy.

10. Reversibly enlargeable bathtub according to each of the preceding claims, characterized in that it has, installed on the fixed element (10), a plurality of jets adapted to create a hydromassage effect.