FR3078350A1 - WATER HUNTING MECHANISM WITH A BLOCKING SYSTEM IN POSITION OF A TRACTION ROD - Google Patents

Abstract

The invention relates to a flushing mechanism for mounting on a tank (1) of toilet water, comprising: - a hollow body (20) intended to be fixed on a lid (10) of the tank; at least one push button (2); - A frame (3) comprising means for closing (30) a hole (11) of water passage formed in a bottom (12) of the tank; - A transmission mechanism (4) between the one or more push buttons and the closure means, comprising a pull rod (42) coupled to the closure means, and a lever inverter system housed in the hollow body; - Locking means (7) in height of the pull rod relative to the hollow body.

Description

Flushing mechanism with a locking system in position of a pull rod

The field of the invention is that of the design and manufacture of sanitary equipment.

More specifically, the invention relates to a flushing mechanism intended to be mounted on a toilet water tank, of the type comprising means for actuating the flushing mechanism in the form of at least one pushbutton.

In the field of the invention, it is known to provide flushing mechanisms comprising a frame mounted in the toilet water tank. The frame comprises a means for closing an orifice formed in a bottom of the tank and through which the water from the tank can be discharged. The closure means is connected by a transmission mechanism to actuation means accessible from outside the tank by a user.

According to a fairly old approach, these actuating means can be constituted by a pull tab, that is to say by a gripping means at the end of a rod intended to be pulled upwards to cause evacuation water from the tank. Thus, clearly, by moving the zipper upwards, one also causes an upward displacement of the means for shutting off the flush and, conversely, by releasing the zipper, this one, as well as the shutter means move downwards until the closure means returns to its position for closing the orifice provided in the bottom of the tank.

According to a more recent but already widely used approach, the actuation means are constituted by a push button (or by two push buttons, one to release a "big game" and the other to release a "small game" flush >>) presented on an upper wall (in practice the cover) of the tank, so that the user must push the push button towards the inside of the tank to cause a flush. Of course, in this case, it is necessary to implement a system which reverses the travel of the push button at the level of the shutter means, so that a downward movement of the push button (s) results in a upward movement of the shutter means, while an upward movement of the push button (s) results in a downward movement of the shutter means.

To obtain this, a lever reverser system is mounted inside the tank, this lever being pivotally mounted about an axis carried either by the frame of the flushing mechanism mounted inside the tank, or by the wall of the tank itself or the cover. One end of the lever is connected by a connecting rod to the push button, while the other end of the lever (opposite the first end relative to the pivot axis) is connected to the closure means.

Such a mechanism is generally satisfactory and proves to be relatively reliable.

To install a flushing mechanism of the push button type as described above, the tank cover is removed and the casing of the flushing mechanism is installed inside the tank. The previously mentioned connecting rod, extending from one end of the lever reversing system, is therefore presented above the casing of the flushing mechanism waiting to be coupled to the push button.

The hollow body which houses the push button and inside which the push button is movably mounted, is arranged and fixed on the tank cover, then the cover is attached to the tank while the installer makes sure to coincide the position of the connecting rod with the push button.

It should be noted that, generally, the flushing mechanism in question is offered by the manufacturer in a single model adaptable to the different tank sizes with regard to its dimensions. On the other hand, the tanks can vary appreciably in shape and in dimensions, in particular in height.

Thus, in certain cases, the space available in height inside the tank is less than the height of the flushing mechanism frame mounted in the tank, cumulative with the height of the lever reverser system and with the height of the connecting rod. There is then no possibility of resting the cover on the tank since the connecting rod protrudes from the upper rim of the tank.

Conventionally in this type of situation, the installer adjusts the height of the connecting rod by adapting it.

However, a current trend is to want to significantly reduce the height of certain tanks.

However, with the push button flushing mechanisms as described above, it is not possible to reduce the height of the tank below a certain limit, this being fixed by the height of the frame of the mechanism. accumulated flush with the lever reverser system.

In any event, the volume of water to be removed determines the height of the entire flushing mechanism mounted inside the tank, and the designer of the flushing mechanism cannot therefore intervene on the height of the mechanism frame. The only possibility for the designer of this type of mechanism is to work on reducing the height above the frame mounted at the bottom of the tank.

To decrease the remaining height, it has been proposed to integrate the lever reversing system into the hollow body in which the push button is mounted.

Such a flushing mechanism is described in the patent document published under the number FR3031527.

This mechanism includes:

a hollow body fixed on a cover of the tank;

- a push button mounted movable in the hollow body between a rest position and at least one pressed position;

a frame mounted inside the tank and comprising a movable shutter means between a shutter position and a release position of a water passage orifice formed in a bottom of the tank;

a transmission mechanism between the push button and the shutter means, comprising:

- a traction rod coupled to the closure means, the traction rod extending through a lower passage of the hollow body and being movable in height relative to the hollow body;

- a lever reverser system housed in the hollow body, the lever reverser system comprising a lever movable in rotation about an axis making it possible to reverse the height movement of the push button or buttons relative to that of the pull rod .

Such a flushing mechanism can be manufactured and always delivered with a pull rod between the lever reverser system and the shutter means, the installer being responsible for adjusting the height of this pull rod. The installer, however, has greater room for maneuver vis-à-vis a tank of appreciably reduced height, due to the integration of the lever reverser system in the hollow body.

This mechanism also comprises means for blocking the height of the pull rod relative to the hollow body, making it possible to lock or unlock the position of the pull rod relative to the hollow body housing the push button. These blocking means can take different forms and allow the installer:

- to make the blocking of the traction rod operative, firstly, by performing an action on the push button to put it in a particular configuration;

- to carry out the installation operation;

- to unlock the draw rod, as a last step, by performing an action on the push button so as to remove it from its particular configuration.

Thanks to the height locking means, the installer will be able to freeze the position of the pull rod relative to the hollow body in height, this while the cover is installed on the tank. The ability to freeze the position of the pull rod relative to the hollow body makes it possible to couple the pull rod to the closure mechanism present in the tank (conversely, if the pull rod is free in translation, it goes up as we try to couple it to the internal mechanism).

This mechanism has a design simplifying the height adjustment of the rod coupling the push button by means of shutter.

However, the installer must remember to lock the height position of the rod while coupling it to the internal mechanism. It must of course also think of unlocking the position of the pull rod to allow the use of the flush during an action on the push button, otherwise it is blocked together with the pull rod .

This becomes all the more tedious if the installer has to go through it several times to perfectly adjust the height of the pull rod relative to the mechanism internal to the tank.

The object of the invention is in particular to overcome this drawback of the prior art.

More specifically, the invention aims to provide a flushing mechanism of the push button type which is even easier and quicker to install than what is permitted by the prior art.

In this sense, the invention aims to provide such a mechanism which does not force the installer to intervene on the locking / unlocking of the pull rod during installation and commissioning of the flushing mechanism d 'water.

The invention also aims to provide such a flushing mechanism whose user experience is not impacted by the improvement of the mechanism.

These objectives, as well as others which will appear subsequently, are achieved thanks to the invention which relates to a flushing mechanism intended to be mounted on a toilet water tank, comprising:

a hollow body intended to be fixed on a tank cover

- At least one push button mounted movable in height in the hollow body between a rest position and at least one pressed position;

- A frame intended to be mounted inside the tank and comprising a movable shutter means between a shutter position and a release position of a water passage orifice formed in a bottom of the tank;

- a transmission mechanism between the push button (s) and the shutter means, comprising:

- a traction rod coupled to the closure means, the traction rod extending through a lower passage of the hollow body and being movable in height along a translation axis T relative to the hollow body;

a lever reversing system housed in the hollow body, the lever reversing system comprising a lever movable in rotation about an axis of rotation R making it possible to reverse the height movement of the push button (s) relative to that of the pull rod;

- means for blocking the height of the pull rod relative to the hollow body, characterized in that the lever occupies a position for blocking the height of the pull rod in the rest position of the push button or buttons, the push buttons being coupled to the lever to cause the lever to rotate and, when the push button (s) are actuated, release it from its blocking position.

In other words, the lever of the lever reverser system is also part of the means for blocking the height of the pull rod relative to the hollow body.

By “blocking in height”, it is understood that the translation from bottom to top and from top to bottom of the traction rod is blocked.

Thanks to the mechanism according to the invention, the installer does not have to perform any particular action to block or unblock the pull rod from its position when the push button or buttons are in the rest position.

In fact, the blocking in height of the traction rod takes place as soon as the push button or buttons are in the rest position. In this position, the lever assumes its position of blocking the height of the draw rod. The pull rod, locked in height, then simplifies the installation of the flushing mechanism.

This locking in height of the pull rod is carried out automatically during the conventional operation of the flushing mechanism and thus also during assembly.

Compared to a mechanism according to the prior art comprising a lever reversing system housed in the hollow body, for the mechanism according to the invention, when the push button or buttons are in a rest position, the traction rod protrudes from the body hollow, and a push exerted on the pull rod in the direction of the hollow body cannot bring the pull rod into the hollow body. Only an actuation of the push button (s) can effectively unlock the pull rod and cause it to go back up inside the hollow body.

Thus, when the draw rod is blocked in a lowered position, the positioning of the push button on the reservoir makes it possible at the same time to adjust by making the draw rod penetrate to the adjusted depth to cooperate properly with the obturation means. An example of installation and automatic adjustment of the flushing mechanism is described in more detail below.

According to a preferred characteristic, the flushing mechanism comprises means for returning the push button or buttons to its or their rest positions.

These return means of the push button (s) in its rest position (s) also exert a function of returning the lever to its locking position in height of the traction rod. Thus, the locking of the pull rod remains effective during the entire installation of the mechanism, or becomes automatic again if the installer inadvertently actuates one of the push buttons. Of course, after the installation of the mechanism, the return of the push button (s) to its rest position (s) is used only in the context of the conventional operation of the flushing mechanism.

Advantageously, the lever has a toothed wheel centered on the axis of rotation R, the toothed wheel being meshed on a rack carried by the or one of the push buttons.

This mechanical link effectively ensures the coupling of the push button (s) to the lever, as well as the training of the lever during the descent or ascent of the push button (s).

This design also has a small footprint while having a small number of parts and being easy to assemble.

According to a preferred embodiment:

- the pull rod has a groove;

- The lever has an eccentric pin of the axis of rotation R, the pin extending parallel to the axis of rotation R and being inserted and capable of sliding in the groove.

The cooperation of the groove with the pin makes it possible to have a feeling of decreasing effort (more important at the start and less and less thereafter) when the push button (s) are pressed.

The groove can be designed so as to increase the force exerted on the closure means to lift it from its closure position (position in which the water present in the reservoir exerts a significant force tending to maintain the means d shutter in its lower shutter position).

In other words, the pin and the groove make it possible to transform the curved path of the pin (rotation of the lever) into a straight path for the draw rod. The shape of the groove (straight groove, curved, inclined, etc.) then makes it possible to modify the distance traveled by the draw rod for an identical degree of rotation of the lever, according to the angular position of the lever.

Preferably, the lever is movable between:

- a high position in the pressed position of the push button (s);

a low position in the rest position of the push button or buttons, the lever being able to pivot from the low position towards the high position in a first direction of rotation while the lever is brought into abutment in a second direction of reverse rotation of the first direction of rotation, and the lever in the locking position is inclined relative to the axis of translation T in the second direction of rotation.

The lower position of the lever then also corresponds to the locking position.

The locking of the draw rod in height is allowed thanks to the design of the transmission mechanism. In fact, in the blocking position (or low position) of the lever, a rise of the traction rod in the hollow body is blocked by the lever.

This blocking results from the position of the lever which is then in abutment in the second direction of rotation, a force being exerted on the traction rod in the direction of the hollow body making the traction rod rest on the lever and pressing the lever on its stop in the second direction of rotation.

In other words, the application of a force on the pull rod towards the hollow body:

- allows the lever to go back to its high position by rotating it in the first direction of rotation, in the case where the lever was not in its locked position;

- does not allow the lever to go back to its high position if the lever is in its locking position, because the pull rod then presses on the lever so that it tends to pivot in the second direction of rotation, and not according to the first direction of rotation.

According to a preferred characteristic, the groove has a lower track with a recess in which the pin comes to be housed in the rest position of the push button or buttons.

In this case, the step is part of, or even constitutes, blocking means. This recess enhances the ability of the lever to remain in the locked position. Only an actuation of the push button (s) makes it possible to pivot the lever so as to dislodge the pin from the offset.

According to another preferred characteristic, the pin has a complementary flat of the groove in the locking position of the lever.

The flat part is also part of the blocking means. It optimizes the contact between the surface of the groove in contact with the pin when the lever is in the locked position. This flat allows to distribute and center the forces exerted on the lever which is in the locked position when the pull rod exerts a pressure towards the hollow body (for example during the installation of the flushing mechanism according to the invention). The flat part thus helps to stabilize the lever in its locked position.

According to a preferred embodiment, the blocking means comprise:

- a locking stop extending in a plane perpendicular to the translation axis T of the traction rod;

- a complementary housing for the locking stop, one of the lever or of the hollow body having the locking stop, the other of the lever or of the hollow body having the housing, the locking stop and the housing cooperating together in the position rest of the push button or buttons to block the height of the pull rod.

This blocking stop and this complementary housing induce or increase the capacity of the lever to lock the pull rod in position.

Indeed, a force applied to the pull rod while the lever is in its locking position produces a plane support connection between the locking stop and one of the housing surfaces which is adapted to prevent or at least greatly limit the ability of the lever to rotate around its axis of rotation.

Advantageously, the groove extends perpendicular to the translation axis T of the traction rod.

The production of the groove is thus simplified.

In addition, the design of the groove makes it easier to lift the closure means.

Indeed, the race of the pawn describes an arc of a circle and does not go up or down the same height depending on whether the lever approaches a horizontal position or a vertical position.

Other characteristics and advantages of the invention will appear more clearly on reading the following description of preferred embodiments of the invention, given by way of illustrative and nonlimiting examples, and of the appended drawings among which:

- Figure 1 is an overall sectional view of a toilet tank equipped with a push button flush mechanism according to the invention;

- Figure 2 is an exploded view of the push button, the hollow body and the transmission mechanism;

- Figures 3a, 3b and 3c are sectional views illustrating the transmission mechanism according to respectively, the case where the push buttons are in a rest position, the case where the push buttons are partially depressed, and the case where the buttons pushers are fully depressed;

- Figures 4a, 4b and 4c are sectional views from an angle of view opposite to that of Figures 3a, 3b and 3c

- Figures 5a and 5b are sectional views along two opposite viewing angles of the transmission mechanism according to a second embodiment;

- Figure 6 is a sectional view of the transmission mechanism according to a first embodiment corresponding to that of Figures 3a, 3b and 3c;

- Figure 7 is a sectional view of the transmission mechanism according to a third embodiment;

- Figure 8 is a sectional view of the transmission mechanism according to a fourth embodiment;

- Figure 9 is a sectional view of the transmission mechanism according to a fourth embodiment;

- Figures 10, 11 and 12 are sectional and perspective views according to different viewing angles of the transmission mechanism according to the fourth embodiment.

With reference to FIG. 1, a flushing mechanism according to the invention is intended to be mounted on a tank 1 of toilet water and comprises:

a push button 2 and in particular two push buttons, one of which corresponds to a "big game" and the other to a "small game", intended to be presented on the cover 10 itself provided to come to rest on the upper rim 100 of the tank to close it, the push buttons being movable from top to bottom and vice versa;

- A frame 3 intended to be mounted inside the tank and comprising a shutter means 30 movable between a low shutter position, in which it closes the orifice 11 of water passage formed in a bottom 12 of the tank, at the base thereof, and a high position for releasing the orifice 11 for the passage of water (thus authorizing the release of a small or a large flush in the direction of the bowl of the bathroom) ; a transmission mechanism 4 between the pushbuttons 2 and the shutter means 30, comprising in particular a lever reverser system 40, designed to reverse the height movement of the push buttons relative to the height movement of the shutter means 30.

The lever reversing system is thus designated in that it makes it possible to transform a movement from top to bottom of the push buttons (corresponding in practice to pressing on the push button (s)) in a movement from bottom to top of the means d 'obturation (resulting in flushing) and, conversely, transforming a movement from top to bottom of the shutter means into a movement from bottom to top of the push button or buttons. This therefore corresponds to a conventional use of the push buttons of the flushing mechanisms according to which when the user presses the push button, it generates a flush (the shutter means passing in the high position) while, when the shutter means returns to its shutter position of the orifice for the passage of water from the reservoir, therefore being in the low position, its movement downward causes the push-button or push-buttons to go back up to the waiting position.

Furthermore, it is noted that the frame (or body) of the flushing mechanism, present inside the tank, can have different constituent and functional parts known from the prior art, namely:

- a float, possibly adjustable, intended to stop the flow of water inside the tank;

- an overflow system;

- a quick-mounting base;

Referring to Figures 1 and 2, the flushing mechanism according to the invention comprises a hollow body 20.

The push buttons 2 are mounted in the hollow body 20, inside which they are movable from top to bottom and vice versa, this hollow body being designed to be secured to the cover of the tank. This fixing of the hollow body to the cover of the tank can be obtained by any appropriate means, in particular using a nut system.

The push buttons 2 are mounted movable in height in the hollow body 20 between a rest position and at least one pressed position.

As will be detailed later, one of the push buttons 2 carries a rack 200.

With reference to FIGS. 1 and 2, the flushing mechanism also includes means 5 for returning the push buttons to their rest positions. These return means are springs 50.

As shown in Figures 2, 4a, 4b and 4c, the hollow body 20 has a lower passage 21. This lower passage is located at a bottom of the hollow body. The lower passage is more precisely centered on the bottom of the hollow body and has a circular section.

As illustrated in FIG. 1, the transmission mechanism 4 also comprises a traction rod 42 intended to be coupled to the closure means 30. This traction rod is intended to tow the closure means to move it in height and release the water passage opening in the bottom of the tank.

The traction rod 42 extends through the lower passage 21 of the hollow body 20. It is movable in height along a translation axis T relative to the hollow body.

As illustrated in FIG. 1, the traction rod 42 is notably movable between:

- a lowered position (Figure 1, Figure 4a or Figure 6), and

- a raised position (Figure 4c) inside the hollow body 20.

More specifically, as shown in Figures 2 to 12, the pull rod 42 comprises a head 421 housed inside the hollow body 20, and a rod 422 extending from the head 421. With reference to the figures 3a to 4c, the traction rod is movable along a translation axis T, the rod 422 being designed to slide through the lower passage 21 of the hollow body.

In the lowered position, the head 421 of the traction rod 42 abuts against the bottom of the hollow body 20.

The traction rod 42 also has a groove 420. This groove 420 is located on the head 421 of the traction rod 42 and is intended to form a pivot-sliding connection with the reversing system as detailed below.

The groove 420 extends perpendicular to the translation axis T of the pull rod 42.

With reference to FIGS. 4a to 12, the groove 420 has a lower track 4201 and an upper track 4202.

As explained above and according to FIGS. 2 to 12, the lever reversing system 40 is housed inside the hollow body 20. This reversing system is coupled to the push buttons 2 and to the pull rod 42 so as to be able to reverse the movement carried out by the push buttons with respect to that carried out by the pull rod 42 and consequently to that carried out by the shutter means 30.

The reversing system 40 for this purpose comprises a lever 41 movable in rotation about an axis of rotation R.

The lever 41 has a toothed wheel 410 centered on the axis of rotation R. This toothed wheel 410 is meshed with the rack 200 carried by one of the push buttons 2.

In this way, pressing the push button 2 causes rotation (or pivoting) of the lever 41 around the axis of rotation R.

The lever 41 also has a pin 411 offset from the axis of rotation R. This pin 411 extends parallel to the axis of rotation R. The pin 411 has a cylindrical shape complementary to the groove 420, the pin of the lever being inserted into the groove and being capable of sliding in the groove. The pin and the groove thus form a pivot-sliding connection. The pin 411 is notably presented by an arm 412 of the lever which extends from the toothed wheel 410.

According to the principle of the invention, the lever occupies a position for blocking the height of the traction rod in the rest position of the push button (s), the push button (s) being coupled to the lever to cause the lever to rotate and, when actuating the push button (s), release it from its blocking position.

Indeed, the flushing mechanism also includes locking means 7 in height of the pull rod relative to the hollow body. These locking means and the locking position of the lever make it possible to lock the pull rod 42 in its lowered position.

Referring to Figure 1, the flushing mechanism advantageously comprises coupling means 6 of the pull rod 42 with the closure means 30 by contacting.

These coupling means are in particular:

- notches 60 presented by the rod 422 of the traction rod 42, the rod

422 in this case having regularly spaced notches, and

- a notched sheath 61, complementary to the rod 422, and presented by the closure means 30.

The notched sheath is designed to allow the insertion of the rod 422 in a direction of insertion and to maintain the captive rod of the notched sheath when the traction rod is pulled in a direction opposite to the direction of insertion. In this way, the pull rod allows the closure means to be raised.

As illustrated in FIG. 1, the traction rod 42 has a rod 422 long enough to be able to adjust the coupling height of the traction rod 42 with the closure means 30. This adjustment is carried out during the progressive insertion of the rod 422 of the traction rod 42 through the notched sheath 61. Once the hollow body is assembled on the tank cover and the cover is in position on the tank, then the rod has been inserted to the correct depth to allow the mechanism to operate.

More specifically, following the previously described adjustment of the height of the pull rod relative to the shutter means, then the shutter means is in the low shutter position when the pull rod is in the lowered position and the one or more push buttons are in the rest position.

Thanks to the design of the mechanism according to the invention, the installation can be carried out easily by the installer.

In fact, thanks to the fact that the traction rod of the mechanism according to the invention is always in a lowered position as soon as the push button or buttons are in the rest position, then the installer does not have to perform any particular action. to ensure that the draw rod assumes its lowered position, or remains in its lowered position when:

- carrying out the adjustment of the height of this traction rod, or

- when the hollow body is placed on the cover (the cover resting on the tank), or when the cover is placed on the tank (the hollow body being previously installed on the cover), the pull rod then mating at the right height with the sealing means.

As previously explained, this installation of the flushing mechanism according to the invention is facilitated by the lever which assumes a position for locking the height of the pull rod when the push button or buttons are in their rest positions.

The lever 41 is more precisely movable between:

- A low position in the rest position of the push button or buttons 2 (Figures 3a and 4a);

- a high position in the pressed position of the push button or buttons 2 (Figures 3c and 4b).

The lever 41 can in fact pivot from the low position to the high position in a first direction of rotation, and from the high position to the low position in a second direction of rotation opposite to the first direction of rotation.

From the low position of the lever 41, the lever is brought into abutment in the second direction of rotation opposite to the first direction of rotation.

The low position of the lever thus corresponds to its position for locking the height of the draw rod.

The operation of the lever reverser system and the pivot-sliding connection are illustrated in FIGS. 3a to 4c.

As can be seen in these figures, pressing the push buttons 2 causes the rack 200 to lower, the lever 41 to rotate about its axis of rotation R from its locked position (or low position) to its high position, and thus the ascent of the pull rod 42 from its lowered position to its raised position.

According to this embodiment, a determined angular displacement does not cause a translation over the same distance depending on whether the lever 41 is close to its low position (lever 41 oriented towards the bottom of the hollow body 20) or close to a position intermediate in which the arm 412 of the lever 41 is parallel to the groove 420 (or perpendicular to the translation axis T of the pull rod).

The locking means 7 in height of the rod can be produced in different ways.

According to the embodiment illustrated in Figures 5a and 5b, in its locking position the lever 41 is inclined relative to the axis of translation T in the second direction of rotation.

This inclination, as well as complementarily the return means 5 (illustrated in FIG. 2) which keep the push buttons 2 in their rest position (and the maintenance of the lever 41 in its blocking position), cause a rise in the pull rod 42 presses on lever 41 by pushing it in the second direction of rotation. In its blocking position, the lever 41 is however brought into abutment in the second direction of rotation, this is how the ascent of the traction rod 42 is blocked by the lever 41 which cannot pivot in the second direction of rotation.

In other words, as illustrated in FIG. 5a, the lever 41 is inclined relative to the translation axis T according to the second direction of rotation. The lever is also brought into abutment in the second direction of rotation. This implies that the lever 41, pivoting in the second direction of rotation from its high position to reach its blocking position, must exceed an equilibrium position (or intermediate position).

This equilibrium position (or intermediate position) corresponds to a state of the lever in which an ascent of the traction rod 42 is capable of making it pivot according to the second direction of rotation or according to the first direction of rotation.

According to the present embodiment, this intermediate position corresponds to the position reached by the lever 41 when it is parallel to the translation axis T of the traction rod 42. Exceeding this equilibrium position means that a rise of the pull rod 42 pushes on the lever so as to rotate it in the second direction of rotation.

When a push button is actuated, the arm 412 of the lever 41 must return to the intermediate position (in which it is aligned with the translation axis T of the pull rod) then continue to pivot in the first direction of rotation.

As illustrated in FIGS. 6 to 10 and in common with these different embodiments, the lever 41 has a locking position in which the arm 412 of the lever 41 is parallel to the axis of translation T of the rod. traction 42.

The lever 41 is then in a state in which a rise in the traction rod 42 is capable of making it pivot in the second direction of rotation or in the first direction of rotation. However, the lever is directly in abutment in the second direction of rotation, the pin being at the end of the race inside the groove.

The locking means 7 in rotation, complementary to the locking position of the lever 41, however make it possible to stabilize the lever in its locking position in height of the traction rod 42.

With reference to the embodiment illustrated in FIG. 6, the locking means 7 comprise:

- A locking stop 70 extending in a plane perpendicular to the translation axis T of the traction rod;

- A housing 71 complementary to the locking stop 70;

the hollow body 20 having the locking stop 70, and the lever 41 having the housing, the locking stop and the housing cooperating together in the rest position of the push button or buttons for locking the height of the pull rod.

When the push buttons 2 are in the rest position, the lever 41 is positioned in such a way that an ascent of the pull rod 42 is blocked by the lever thanks to its blocking position and to the cooperation of the blocking stop 70 with housing 71.

More specifically, pressing the lever 41 along the translation axis T, coming from the traction rod 42, strengthens the cooperation of the locking stop 70 with the housing 71 by creating a plane support link adapted to stabilize the lever in its locked position and to prevent the lever 41 from driving in rotation about the axis of rotation R, in the first direction of rotation.

In other words, the blocking stop 70 is an outgrowth of the hollow body coming to be housed in a cavity presented by the lever 41, the cooperation of the outgrowth with the cavity preventing any translation of the lever along the translation axis T of the pull rod.

This embodiment of the blocking means also makes it possible not to impact the use of the push button when releasing a flush. In fact, the user does not feel any additional resistance when the push button is actuated other than that resulting from the presence of the return means and the water located in the tank. There is no resistance as a result of the lever being forced out of its locked position.

According to another embodiment illustrated by FIG. 7, the pin 411 has a flat 413 complementary to the groove 420 in the rest position of the push button or buttons 2.

This flat 413 makes it possible to have a plane support connection between the flat 413 of the lever 41 and the lower track 4201 of the groove 420, when the lever 41 is in its rest position.

According to this embodiment, the flat 413 and at least the portion of the lower track 4201 intended to be in contact with the flat are in planes perpendicular to the axis of translation T of the traction rod 42.

This design of the flat makes it possible to stabilize the lever 41 in its locked position when a force is exerted on the traction rod 42 to tend to make it go back up in the hollow body 20.

The flat and the portion of the lower track can also be oriented so as to cause a rotation of the lever according to the second direction of rotation in the case where the lever is in its rest position and where a force is exerted on the pull rod. to tend to bring it back into the hollow body. In this case, by being in the rest position, the lever cannot pivot more in the second direction of rotation and blocks the pull rod in height.

According to yet another embodiment illustrated by FIG. 8, the lower track 4201 of the groove 420 has with a recess 4200 in which the pin 411 of the lever 41 is housed in the rest position of the push button or buttons 2.

This recess 4200 creates a clearance allowing a tiny rise in the draw rod 42 while the lever 41 is in the locking position, allowing the pin 411 to be housed in the recess 4200.

The pull rod is thus locked in height and cannot go back up in the hollow body under the sole effect of a force applied to the pull rod while the lever is in the locked position.

More specifically, in the case where a force is exerted on the pull rod 42 to tend to make it go up in the hollow body 20, the pull rod then rises slightly and the pin 411 of the lever 41 (which is in its position blocking) is housed in the recess 4200. In this situation, the cooperation of the pin with the recess stabilizes the lever in its blocking position because a rotation in the first direction of rotation is limited by the step formed by the recess 4200 with respect to the lower track 4201. To be able to turn in the first direction of rotation, the pawn must then disengage from the setback and take the step. This recess thus participates in stabilizing the lever in its locked position when a force is applied to the pull rod.

With reference to the fourth embodiment illustrated by FIGS. 9 to 12, the locking means 7 comprise a locking stop 70 located directly above the pin 411 of the lever 41, along the translation axis T of the traction rod 42, in the rest position of the push button or buttons 2.

With reference to FIGS. 9 and 12, in this embodiment the blocking stop 70 is more precisely formed by a rib 201 presented by the hollow body 20.

The rib extends longitudinally along the axis of translation T of the pull rod 42.

This rib 201 has a shoulder 202 located directly above or in contact with the pin 411 of the lever 41 in the rest position of the push button or buttons 2.

The shoulder makes it possible to create a bearing surface on which the pin 411 of the lever 41 is in support in the event that a force is applied from the traction rod along the translation axis T, in the direction of the hollow body, while the push buttons 2 are in the rest position. By being presented by the rib 201, the bearing surface created by the shoulder 202 makes it possible to distribute over the hollow body the stresses exerted by the pin during the occurrence of such an event.

Of course the shoulder and the bearing surface are designed (shape, orientation, etc.) so as to maintain the lever in its blocking position when the push button is in the rest position and if a force capable of causing it to rise the pull rod in the hollow body is exerted on said rod.

This shoulder also has dimensions such that it completely overhangs the pin along the translation axis T, when the push button is in the rest position.

Thanks to the shape and size of the locking stop, this embodiment has the advantage of preventing untimely unlocking of the height locking means during the installation of the push button.

This embodiment also has the advantage of being particularly robust, and in particular more robust than the embodiment illustrated in FIG. 6.

Indeed, if a force as described above is exerted on the traction rod, then the stresses are exerted mainly on the rib 201 and thus on the hollow body 20, and not on the axis of rotation of the lever 41.

These different embodiments of the locking means can be combined with one another, partially or completely. Of course, certain characteristics of these different embodiments may need to be adapted to the combination achieved.

For example, the groove may have a recess and the pin may have a flat complementary to the recess.

Claims (9)

1. Flushing mechanism intended to be mounted on a tank (1) of toilet water, comprising: - a hollow body (20) intended to be fixed on a cover (10) of the tank; - At least one push button (2) mounted movable in height in the hollow body between a rest position and at least one pressed position; - a frame (3) intended to be mounted inside the tank and comprising a closure means (30) movable between a closure position and a release position of an orifice (11) for the passage of water formed in a bottom (12) of the tank; - a transmission mechanism (4) between the push button (s) and the shutter means, comprising: - a traction rod (42) coupled to the closure means, the traction rod extending through a lower passage (21) of the hollow body and being movable in height along a translation axis T relative to the body hollow; - a lever reversing system housed in the hollow body, the lever reversing system comprising a lever (41) movable in rotation about an axis of rotation R making it possible to reverse the displacement in height of the push button (s) relative to that of the pull rod; - locking means (7) in height of the traction rod relative to the hollow body, characterized in that the lever occupies a position of locking in height of the traction rod in the rest position of the push button or buttons, the push button or buttons being coupled to the lever to cause the lever to rotate and, when the push button or buttons are actuated, release it from its blocking position. 2. Flushing mechanism according to the preceding claim, characterized in that it comprises return means (5) of the push button (s) (2) in its or their rest positions. 3. Flushing mechanism according to any one of the preceding claims, characterized in that the lever (41) has a toothed wheel (410) centered on the axis of rotation R, the toothed wheel being meshed on a rack (200) carried by the or one of the push buttons (2). 4. Flushing mechanism according to any one of the preceding claims, characterized in that: - the pull rod (42) has a groove (420); - The lever (41) has a pin (411) eccentric from the axis of rotation R, the pin extending parallel to the axis of rotation R and being inserted and capable of sliding in the groove. 5. Flushing mechanism according to the preceding claim, characterized in that the lever (41) is movable between: - a high position in the pressed position of the push button (s) (2); a low position in the rest position of the push button or buttons, the lever being able to pivot from the low position towards the high position in a first direction of rotation while the lever is brought into abutment in a second direction of reverse rotation of the first direction of rotation, and in that the lever in the locking position is inclined relative to the axis of translation T in the second direction of rotation. 6. flushing mechanism according to any one of claims 4 and 5, characterized in that the groove (420) has a lower track (4201) with a recess (4200) in which the pin (411) comes stay in the rest position of the push button (s) (2). 7. Flushing mechanism according to any one of claims 4 to 6 characterized in that the pin (411) has a flat (413) complementary to the groove (420) in the locking position of the lever (41) . 8. Flushing mechanism according to any one of claims 4 to 7, characterized in that the locking means (7) comprise: - a locking stop (70) extending in a plane perpendicular to the translation axis T of the traction rod (42); 5 - a housing (71) complementary to the locking stop, one of the lever (41) or of the hollow body (20) having the locking stop, the other of the lever or of the hollow body having the housing, the stop blocking and the housing cooperating together in the rest position of the push button (s) (2) for locking the height of the pull rod. 9. Flushing mechanism according to any one of claims 4 to 8, characterized in that the groove (420) extends perpendicular to the translation axis T of the pull rod (42).