FR3108488A1 - Toilet seat - Google Patents

Abstract

Title: Toilet seat The invention relates to a toilet seat comprising a body capable of at least partially covering an upper face of a toilet bowl (1) in a lowered position of the seat on the upper face of the bowl ( 1), and a body drive system (4) configured to reversibly move the body between the lowered position and an extended position of the flap relative to the upper face of the bowl (1) characterized in that the body is divided into at least a first part and a second part distinct from the first part, and in that the training system (4) is configured to train, according to two different movements, the first part (21) and the second part (22) between the lowered position and the deployed position. Figure for the abstract: Fig. 15

Description

Toilet seat

The present invention relates to the field of sanitary installations for toilets. It finds a particularly advantageous application in the field of devices of the WC type comprising a bowl and a lid capable of using at least partially the upper face of the bowl, such as a bezel and/or a lid.

STATE OF THE ART

WC-related techniques are generally very traditional. A bowl, forming a receptacle with an upper mouth, forms a seating element for the user. The bowl is for example made of porcelain. In most cases, a cover added above the bowl to close the mouth of the latter when the toilet is not in use. A hinge by pivot, directed along the width of the bowl, ensures the passage of the lid from a lowered position, closed, to a raised position.

In many other cases, in addition to the lid, a bezel is incorporated into the assembly so as to offer the user a seating surface so that he is not directly in contact with the upper edge of the bowl. Like the lid, the bezel is generally articulated by a pivot between a lowered position in contact with the edge of the bowl and a raised position. Under these conditions, the bezel and the cover are superimposed.

More sophisticated installations ensure automatic lifting of the lid, by a motorization associated with the pivot axis of the latter.

However, this technology remains basic and does not offer great freedom of relative configuration between a seat, such as a lid or bezel, and the bowl.

An object of the present invention is therefore to provide a seat and a toilet equipped with this seat offering a new kinematics of movement of the seat relative to the bowl.

The other objects, features and advantages of the present invention will become apparent from a review of the following description and the accompanying drawings. It is understood that other benefits may be incorporated.

SUMMARY

To achieve this objective, according to one embodiment, a toilet seat is provided comprising a body capable of at least partially covering an upper face of a toilet bowl in a lowered position of the seat on the upper face of the bowl, and a body drive system configured to reversibly move the body between the lowered position and an extended position of the lid relative to the upper face of the bowl.

Advantageously, the body is divided into at least a first part and a second part distinct from the first part, and the drive system is configured to drive, according to two different movements, the first part and the second part between the lowered position and the deployed position.

Thus, the movements of two parts of the seat are differentiated. A non-limiting possibility that follows is to free up at least partially the space located at the rear of the bowl, whereas, currently, this part is inevitably encumbered by a lid and/or a bezel, when they are raised. For example, the user can lean back more easily, or, at the very least, is less hampered in his backward movements.

In general, we offer a different configuration of the seat in its deployed position.

Another aspect concerns a toilet comprising a bowl and a seat.

Another aspect is a method for moving a seat from a lowered position on a bowl to an extended position relative to the bowl.

BRIEF DESCRIPTION OF FIGURES

The aims, objects, as well as the characteristics and advantages of the invention will emerge better from the detailed description of an embodiment of the latter which is illustrated by the following accompanying drawings in which:

There shows a rear perspective view of a toilet according to a first embodiment.

There shows an exploded view of various components, according to the first embodiment.

Figures 3 to 6 reflect, from the rear face of the bowl, a sequence of possible movements of the two parts of the seat, in the first embodiment.

There is a rear perspective of a toilet according to a second embodiment.

There shows, in exploded view, components of the WC, according to this second embodiment.

Figures 9 and 10 show, from the rear face of the bowl, an example of a sequence of movements, according to the second embodiment.

Figures 11 to 13 reveal the details of the drive system allowing the sequence of movements in the second embodiment.

There is a side view of a toilet while the seat is in a transitional position towards a deployed position, raised relative to the bowl.

There presents an example of the final configuration of the flap in the deployed position in the second embodiment.

Figures 16 to 18 reflect the return mobility, from the deployed position, of the seat.

The drawings are given by way of examples and do not limit the invention. They constitute schematic representations of principle intended to facilitate understanding of the invention and are not necessarily scaled to practical applications.

DETAILED DESCRIPTION

• le corps présente une direction longitudinale apte à correspondre à une direction longitudinale de la cuvette, et dans lequel les deux mouvements sont symétriques relativement à la direction longitudinale.
• la première partie et la deuxième partie sont jointives dans la position abaissée et sont écartées l’une de l’autre dans la position déployée.
• le système d’entrainement est configuré pour produire une rotation de chacune parmi la première partie et la deuxième partie.
• la rotation est suivant un axe dirigé selon une dimension en largeur du corps, perpendiculaire à une direction longitudinale du corps apte à correspondre à une direction longitudinale de la cuvette.
• la rotation est suivant un axe dirigé selon une direction longitudinale du corps apte à correspondre à une direction longitudinale de la cuvette.
• le système d’entrainement est configuré pour produire une translation de chacune parmi la première partie et de la première partie, dans une même direction, et dans des sens opposés, de sorte à écarter la première partie et la deuxième partie depuis la position abaissée et à les rapprocher depuis la position déployée.
• le système d’entrainement comprend un moteur et une glissière héliocoïdale comprenant une vis sans fin entrainée par le moteur et configurée pour produire la translation.
• la direction de translation est dirigée selon une dimension en largeur du corps, perpendiculaire à une direction longitudinale du corps apte à correspondre à une direction longitudinale de la cuvette.
• le système d’entrainement est configuré pour produire, depuis la position abaissée, d’abord la translation puis la rotation, et inversement depuis la position déployée.
• le système d’entrainement est configuré pour produire, depuis la position abaissée, d’abord la translation puis la rotation lorsque la première partie et la deuxième partie sont en fin de course sur la vis sans fin, et inversement depuis la position déployée.
• la première partie et la deuxième partie comprennent chacune un pan d’appui sur une surface de guidage en translation, le pan d’appui présentant une première tranche et une deuxième tranche inclinée relativement à la première tranche.
• la première partie et la deuxième partie sont symétriques selon la direction longitudinale du corps.
• la direction longitudinale du corps est la plus grande dimension du corps lorsque les deux parties sont jointes.
• en position déployée, la première partie et la deuxième partie forment un angle d’au moins 90° avec la face supérieure de la cuvette.
• le système d’entrainement est configuré pour entrainer simultanément la première partie et la deuxième partie entre la position abaissée et la position déployée
• le corps est un couvercle ; une lunette est éventuellement intercalée entre la face supérieure de la cuvette et le couvercle.
• le corps est une lunette ; un couvercle recouvre éventuellement la lunette.
• l’abattant peut comprendre à la fois une lunette et un couvercle, et chacun peut constituer un corps en au moins une première partie et une deuxième partie entrainées comme décrit.
• le corps ne comprend avantageusement que deux parties.

Before starting a detailed review of embodiments of the invention, characteristics are listed below successively which are only optional and which can possibly be used in combination or alternatively:

• the body has a longitudinal direction adapted to correspond to a longitudinal direction of the bowl, and in which the two movements are symmetrical relative to the longitudinal direction.
• the first part and the second part are contiguous in the lowered position and are separated from each other in the deployed position.
• the drive system is configured to produce a rotation of each of the first part and the second part.
• the rotation is along an axis directed along a width dimension of the body, perpendicular to a longitudinal direction of the body capable of corresponding to a longitudinal direction of the bowl.
• the rotation is along an axis directed along a longitudinal direction of the body adapted to correspond to a longitudinal direction of the bowl.
• the drive system is configured to produce a translation of each of the first part and the first part, in the same direction, and in opposite directions, so as to separate the first part and the second part from the lowered position and bring them closer from the deployed position.
• the drive system includes a motor and a helical slide comprising a worm driven by the motor and configured to produce the translation.
• the direction of translation is directed along a width dimension of the body, perpendicular to a longitudinal direction of the body capable of corresponding to a longitudinal direction of the bowl.
• the drive system is configured to produce, from the lowered position, first the translation then the rotation, and vice versa from the deployed position.
• the drive system is configured to produce, from the lowered position, first the translation then the rotation when the first part and the second part are at the end of their travel on the endless screw, and vice versa from the deployed position.
• the first part and the second part each comprise a bearing surface on a surface for guiding in translation, the bearing surface having a first edge and a second edge inclined relative to the first edge.
• the first part and the second part are symmetrical along the longitudinal direction of the body.
• the longitudinal direction of the body is the longest dimension of the body when the two parts are joined.
• in the deployed position, the first part and the second part form an angle of at least 90° with the upper face of the bowl.
• the drive system is configured to simultaneously drive the first part and the second part between the lowered position and the deployed position
• the body is a lid; a bezel is optionally interposed between the upper face of the bowl and the lid.
• the body is a bezel; a cover possibly covers the bezel.
• the flap can comprise both a bezel and a lid, and each can constitute a body in at least a first part and a second part driven as described.
• the body advantageously comprises only two parts.

In the following, two embodiments of the invention are exposed in a non-limiting manner. Furthermore, characteristics of the two modes, which are compatible, can be combined.

In what follows, the flap is a lid 2. It is understood that, alternatively, it may be a toilet seat. On the other hand, the toilet can be equipped with both a bezel and a cover, and at least one of them can form a flap operating according to the invention. According to one possibility, the seat having the kinematics proposed here corresponds to a lid, the WC also being equipped with a seat. The assembly formed by the seat in the form of a lid and by the bezel can constitute a kit sold separably but returnable on a toilet bowl. Advantageously, the bezel is itself mounted for rotation so as to be liftable in a conventional manner, this movement possibly being carried out by an electric motor.

There presents a perspective of a sanitary device for toilets which consists of a WC, comprising a bowl 1 and a flap in the form of a lid 2. The bowl 1 can be formed in a conventional manner. It has a rear face 12 generally intended to be applied to a wall wall, two flanks 14a, 14b extending along a longitudinal direction of the bowl from the rear face 12 and meeting at the front of the bowl. The latter, as shown in , can for example be rounded.

It is understood that the bowl 1 may have any external appearance, in particular for aesthetic reasons.

The bowl 1 delimits an internal volume having an opening at the level of the upper face of the bowl 1, this mouth being delimited by an upper edge 11. The upper edge 11 is a closed contour, for example directed along a plane, horizontal when the bowl is mounted in one piece.

Preferably, as described in more detail later, the bowl 20 has, behind the upper edge 11, a recess 13 providing a mounting space, with mobility, of the seat. Preferably, the recess 13 extends as far as the rear face 12. Furthermore, this recess may be at a level of height lower than that of the upper edge 11, via a step 15 forming a vertical face (or inclined) joining the level of the upper edge 11 and the level of the recess 13. Thus, a useful space is defined for mounting the seat drive system, without inappropriately raising the latter.

In the case of the , the flap is a lid 2. It is presented there in the lowered position, that is to say covering the upper edge 11 of the bowl 1. This does not necessarily mean that there is support between the lid 2 and bowl 1. Furthermore, a bezel can be interposed.

Conventionally, the cover 2 comprises a body defining a surface capable of covering the mouth of the bowl 1. The body thus has an extension in a plane which can be positioned parallel to the upper edge 11. Preferably, the cover 2 covers the entire upper face of the bowl 1, or even overflows. For example, flanges 214, 224 can protrude from the plane of the body, downwards, to cover part of the side wall of the bowl 1.

There has an orthogonal reference in which the direction L corresponds to the longitudinal dimension of the bowl 1 and of the body when the latter is lowered onto the bowl 1. The direction h reflects the height of the assembly, and is typically vertical. The direction l corresponds to the direction perpendicular to the longitudinal dimension and forms the width of the toilet and the body.

In general, the body of the lid 2 has a rear end articulated relative to the bowl 1. A drive system allows the movement of the body, to pass from the lowered position shown in the to a deployed position. The drive system is advantageously electric. Preferably, it is disengageable so as to allow manual actuation of the seat, in particular in the event of failure of the electric motor.

The deployed position means a position in which the seat is not opposite the upper face of the bowl 1; in the case of a lid, this means that in the deployed position the seat no longer closes the mouth of the bowl.

Figures 1 and 2 also show that the body of the seat comprises a first part 21 and a second part 22. In the case of the , in the lowered position, the parts 21, 22 are contiguous, in the sense that they have central edges 211, 221 facing each other and close together, and preferably in contact, to close the bowl.

Preferably, the central edges 211, 221 form a rectilinear section along the longitudinal dimension. However, aesthetic variations are possible.

Preferably, the parts 21, 22 are symmetrical along a vertical plane corresponding to the plane Lh, preferably in the middle of the width of the bowl 1.

It is understood that, unlike traditional flaps, the one proposed here has a body 2 divided into several elements which will be able to be mobilized separately.

To achieve this mobility, a drive system 4 is provided. It is preferably located towards the rear of the bowl 1, at the level of the recess 13. It makes it possible to make the kinematic connection between the bowl 1 and the parts 21, 22. Preferably, it is a rear portion 212, 222 parts 21, 22 which receives this connection.

It should be noted that the drive system does not necessarily connect the seat to the bowl 1. In particular, the fixed part could be a wall, or any other fixed structure relative to the bowl.

Thus, the seat and the bowl are not necessarily integral with each other.

According to a preferred embodiment, the parts 21, 22 are configured to operate a complex movement comprising a translation and a rotation.

In this context, the embodiment shown in Figures 1 to 6 proposes to pass from the lowered position to the deployed position by a separation movement of the parts 21, 22, in the direction of the flanks 14a, 14b and by a flap movement parts 21, 22 on these sides, by rotation. Preferably, from the lowered position, part of the movement comprises translation only, corresponding to the arrows indicated in . Then, as the translation continues, a rotation is initiated, as shown by the combined arrows of the . The continuation of this mixed movement makes it possible to reach the laterally folded situation of the which constitutes the deployed position in this embodiment.

The drive system 4 implemented to mobilize the parts 21, 22 is reversible in the sense that it is possible to pass from the deployed position to the lowered position in the opposite way. Thus, the shows a closing phase of the flap, with a mixed movement (roto-translative) similar to that of the , but in the opposite direction. Advantageously, the closure continues with a translation phase, corresponding to the movement of the , but in the opposite direction.

To achieve this sequence of movements, an example of a drive system 4 that can be used and shown in Figures 1 to 6 is described below.

As indicated previously, the drive system 4 can be located at the rear of the bowl, in particular at the level of a recess 13.

It may comprise an endless screw 43, preferably with a longitudinal axis directed along the width dimension l, and driven in rotation by any motorization, in particular by an electric motor. At the ends of the endless screw 43, bearings 45 can be used for guiding in rotation. Each part 21, 22 is equipped with a carriage referenced respectively 41, 42 capable of forming a helical slide connection with the endless screw 43. It is possible to constitute an endless screw per carriage and to drive them, according to directions opposed, by motorization. However, in the illustrated embodiment, the endless screw 43 is common to the two carriages 41, 42 and has, for this purpose, two threaded portions having for one a left-handed thread and for the other a left-handed thread. right, so that the rotational movement of the motor generates movements in the opposite direction of the carriages 41, 42.

Each carriage 41, 42 can be in the form of a block provided with a threaded through hole capable of cooperating with the threaded portion of the endless screw 43 and, moreover, provided with a guide surface relative to a part fixed, such as the surface of the recess 13. In this helical connection, insofar as the rotation of the carriage 41, 42 is stopped by the guide surface, the carriage can only follow a translational movement, in the direction of screw 43.

In the first embodiment, the carriage 41, 42 is also rotatably mounted on the corresponding part 21, 22. This assembly can take place by means of an arm 215, 225 secured to the part 21, 22, and able to project downwards from a main plane of the body of the cover 2.

Thus, in a first phase of opening the lid 2, corresponding to the , a rotational movement of the rod 43 produces an activation of the carriages 41, 42 in the opposite direction, so as to move the parts 21, 22 away. The axis of rotation is referenced 3 and corresponds to the longitudinal axis of the screw 43 and the width of the WC.

During this phase, the parts 21, 22 are guided by a first section 2131, 2231 of a support panel 213, 223 of each of the parts 21, 22. Preferably, each support panel projects from a main extension of the cover body 2, downwards. The first slice 2131, 2231 is parallel to the main extension plane and to the guide surface of the parts 21, 22 (typically the surface of the recess 13) so that the movement of the carriages 41, 42 only produces a translation.

In another phase, corresponding to the , it is a second section 2132, 2232 of the bearing surfaces 213, 223 which provides guidance. This second slice has an inclination relative to the first, forming a reduction in the thickness of the bearing surface. Under these conditions, and taking into account the existing pivot connection between each carriage 41, 42 and its arm 215, 225, a rotation will gradually occur, the second slice remaining in contact with an edge 131, 132 of the recess 13.

The dimensions of the drive system are adapted to the weight of the two parts 21, 22 of the lid 2, insofar as this configuration has a fairly large lever arm. You can play on the mass corresponding to the rear part of each of the two parts 21, 22, for example at the level of each support face 213, 223, to distribute the mass unevenly over each part 21, 22, to favor the distribution of efforts. On the other hand, the pivot connection provided between the carriages and each part 21, 22 will be sized to have sufficient rigidity.

It should be noted that dividing the seat into two parts makes it possible to obtain two elements that are less heavy than the complete seat, and easier to mobilize.

To go from the deployed position of the in the lowered position of the , it suffices to reverse the direction of rotation of the screw 43, as shown in the .

Figures 7 to 15 illustrate another embodiment. As before, a translational movement and a rotational movement are combined for the two parts 21, 22 of the cover 2.

As before, in the lowered position corresponding to the , the two parts 21, 22 are joined by their central edges 211, 221.

As before, the drive system 4 can be located towards the rear of the bowl 1, in particular by being carried by a recess 13.

Still similarly to the previous case, the relative movement of the parts 21, 22 includes a translation, making it possible to separate the parts 21, 22, as shown in . A situation of extreme separation is represented at the .

At this stage, a rotational movement is initiated to raise each of the two parts 21, 22, as shown, in profile the . When the lifting is finalized, we can reach the situation presented in the . Preferably, the lift is configured so that the upper edge of the bowl and the main extension plane of the parts 21, 22 of the body of the cover 2 form an angle greater than or equal to 90°.

As this embodiment reflects, it is possible for the translation and rotation movements to take place successively, without a movement phase in which a rotation and a translation would be combined.

The drive system 4 may include, in this context, an endless screw 43 as before. And, as before, a carriage 41, 42 can equip each of the parts 21, 22. Guiding the carriages 41, 42 makes it possible, as before, to prevent their rotation along the screw 43 and to produce the corresponding translational movement. to the . It will be noted that the guiding can take place by the face of the recess 13, but also, in addition or alternatively, by any other guiding surface, and it is within this framework that the has a guide wall 44a. Such an arrangement can be made in the first embodiment as well.

However, at the end of the translation, this embodiment is provided to execute a rotation of the lid 2. This rotation takes place along the width dimension l, and not along the longitudinal direction L as previously.

Figures 11 to 13 show one possibility for producing the sequence of translation and rotation. In these figures, two guide walls 44a, 44b are shown and form parallel sections extending vertically on either side of the carriages 41, 42. In the illustrated configuration, the guidance, during the translation, takes place by the upper edge of each of the guide walls 44a, 44b. Each part 21, 22 then comprises a support surface capable of cooperating with the guide surface of the sections 44a, 44b. It is here a finger 226 crossing the body of the carriage by forming two wings extending on either side of the axis of rotation of the screw 43. This situation is reflected by the For example.

However, the guide wall 44a, located furthest rear of the system, does not extend as far as the distal end of the useful stroke of the screw 43. This length offset frees up space for movement of the carriage, without be retained in rotation in the direction of the wall 44a. There gives, from the back of the WC, an illustration of this functional space.

It is understood that, when the carriage 42 reaches the limit stop 46, the translation can no longer continue. Despite everything, the continuation of the rotation of the screw 43 generates a clamping effect of the carriage 42 against the stop 43. The friction increasing during this clamping, a torque is transmitted to the carriage by the screw 43, a torque which allows a rotation of part 22, insofar as carriage 42 is no longer held in rotation by guide wall 44a. Thus, we go from the situation of the to that of the . The wing of the finger 226 located at the rear of the assembly fits into a zone freed from the guiding of the wall 44a and a lifting rotation movement occurs. The rotation of the screw 43 is stopped when the desired lifting level is reached, for example at least 90°.

Optionally, a portion of the part 21, 22 can rest on the corresponding side 14a, 14b of the bowl 1; alternatively or in addition, the part 21, 22 rests on the edge 131, 132 of the bowl at the end of the rotational stroke.

Figures 16 and 17 show the reverse movement. From the raised position, the shows a rotation of the screw 43 in the opposite direction to the lifting direction, here the counterclockwise direction.

Insofar as the carriage 42 remains clamped on the limit stop 46, the moment of force occurs to lower the part 22.

On the other hand, when the part 22 covers a position of support of the front wing of the finger 226 on the surface of the guide wall 44b, as is the case in , the rotation of the screw 43 leads to loosening the carriage of the stop 46, because the rotation can no longer continue for the part 22. We then find a functioning in helical slide which gradually puts the rear wing of the finger 226 in support. on the guide surface of the wall 44a.

The rotational movement of the screw 43 can continue until the lowered, closed position, as shown in the .

The illustrated embodiments make it possible to couple the movements of rotation and translation from the same motorization and for the two parts 21, 22. Other solutions are possible. In particular, the rotation can be produced by means (in particular motors) different from those of the translation. In addition, the training of the first part 21 can be carried out by means different from those of the second part. According to one option, the drive system is carried by a wall adjoining the rear face. The seat is then cantilevered above toilet bowl 1, from the wall.

The invention is not limited to the embodiments described above and extends to all the embodiments covered by the claims.

List of references

1. Bowl
11. Upper edge
12. Back side
13. Withdrawal
131. Indent Edge
132. Indent edge
14a. Flank
14b. Flank
15. Walk
2. Lid
21. Part One
22. Part Two
211. Center edge
221. Center edge
212. Rear portion
222. Back portion
213. Support pan
223. Support pan
214. Ledge
224. Ledge
2131. First installment
2231. First installment
2132. Second installment
2232. Second installment
215. Arms
225. Arms
226. Finger
3. Axis
4. Drive system
41. Trolley
42. Trolley
43. Worm
44a. guide wall
44b. guide wall
45. Landing
46. End stop

Claims (15)

Toilet seat comprising a body capable of at least partially covering an upper face of a toilet bowl (1) in a lowered position of the seat on the upper face of the bowl (1), and a drive system ( 4) of the body configured to move the body reversibly between the lowered position and a deployed position of the flap relative to the upper face of the bowl (1), characterized in that the body is divided into at least a first part and a second part distinct from the first part, and in that the drive system (4) is configured to drive, according to two different movements, the first part (21) and the second part (22) between the lowered position and the deployed position. Seat according to the preceding claim, in which the body has a longitudinal direction capable of corresponding to a longitudinal direction of the bowl (1), and in which the two movements are symmetrical with respect to the longitudinal direction. Seat according to one of the preceding claims, in which the first part (21) and the second part (22) are contiguous in the lowered position and are spaced apart from each other in the extended position. A seat according to any preceding claim, wherein the drive system (4) is configured to produce rotation of each of the first part and the second part. Seat according to the two preceding claims in combination, in which the rotation is along an axis (3) directed along a width dimension of the body, perpendicular to a longitudinal direction of the body adapted to correspond to a longitudinal direction of the bowl (1). Seat according to one of the two preceding claims, in which the rotation is along an axis (3) directed along a longitudinal direction of the body capable of corresponding to a longitudinal direction of the bowl. Seat according to one of the preceding claims, in which the drive system (4) is configured to produce a translation of each of the first part and of the second part, in the same direction, and in opposite directions, so moving the first part and the second part apart from the lowered position and moving them closer together from the deployed position. Seat according to the preceding claim, in which the drive system (4) comprises a motor and a helicoidal slide comprising an endless screw driven by the motor and configured to produce the translation. Seat according to any one of the two preceding claims, in which the direction of translation is directed along a width dimension of the body, perpendicular to a longitudinal direction of the body adapted to correspond to a longitudinal direction of the bowl (1). Seat according to the preceding claim in combination with claim 5, in which the drive system (4) is configured to produce, from the lowered position, first the translation then the rotation, and vice versa from the deployed position. Seat according to the preceding claim in combination with claim 8, in which the drive system is configured to produce, from the lowered position, first the translation then the rotation when the first part and the second part are at the end of their travel on the endless screw (43), and vice versa from the deployed position. Seat according to Claim 8 in combination with Claim 6, in which the first part (21) and the second part (22) each comprise a bearing surface (213, 223) on a surface for guiding in translation, the support (213, 223) having a first slice (2131, 2231) and a second slice (2132, 2232) inclined relative to the first slice (2131, 2231). WC comprising a bowl (1) and a seat according to one of the preceding claims. WC according to the preceding claim, in which the upper face of the bowl (1) comprises an upper edge (11) surrounding a mouth of the bowl, and a recess (13) joining the upper edge (11) and a rear face (12) of the bowl (1), the drive system (4) being located on the recess (13). WC according to one of the two preceding claims, in which, in the deployed position, the first part (21) is located along a first side (14a) of the bowl (1), and the second part (22) is located along a second flank (14b) of the bowl (1), opposite the first flank (14a).