RU2770705C2 - Water drain mechanism with system of traction rod locking - Google Patents

Abstract

FIELD: plumbing.SUBSTANCE: invention relates to the field of plumbing devices. A drain mechanism contains hollow case (20) fixed to cover (10) of a drain tank, at least one push button (2) mounted in the hollow case with the possibility of movement by height between an initial position and at least one pressed position, fittings (3) mounted inside the drain tank and connecting overlap means (30) made with the possibility of movement between an overlap position and an opening position of water release hole (11) made in lower wall (12) of the drain tank, and transferring mechanism (4) between one or several push buttons and overlap means. The transferring mechanism contains traction rod (42) connected to overlap means. The traction rod passes through lower channel (21) of the hollow case, and it is made with the possibility of movement by height along the axis of movement T relatively to the hollow case. The transferring mechanism contains a lever return system placed in the hollow case. The lever return system contains lever (41) made with the possibility of rotation around the axis of rotation R, providing the reverse stroke by height of one or several push buttons relatively to the height of the traction rod. The transferring mechanism also contains means (7) for locking the traction rod by height relatively to the hollow case. In the initial position of one or several push buttons, the lever takes a position of locking the traction rod by height. One or several push buttons are connected to the lever to rotate the lever and, after actuating one or several push buttons, to remove it from the locking position. Lever (41) contains gear wheel (410), the center of which is installed on the axis of rotation R. The gear wheel is in engagement with gear rail (200) connected to one or several push buttons (2).EFFECT: provision of a push-button water drain mechanism with simplified installation.8 cl, 12 dwg

Description

The present invention relates to the design and manufacture of sanitary equipment.

More specifically, the present invention relates to a flush mechanism for installation on water tanks of a toilet, comprising means for actuating the flush mechanism in the form of at least one push button.

In the technical field of the present invention, mechanisms for draining water are known, containing fittings installed in a water tank for a toilet bowl. The armature contains a means for closing the hole made in the lower wall of the tank, through which the water contained in the tank can flow. The cover means is connected by means of a transmission mechanism to actuating means which can be accessed by the user from outside the tank.

According to one rather old approach, these actuating means can be a handle, that is, when one end of the rod is grasped and pulled upwards to release water from the tank. Thus, it is understood that upward movement of the handle causes upward movement of the drain closing means, and vice versa, after releasing the handle, the closing means moves downward to a position in which the closing means closes the hole made in the bottom wall of the tank.

According to a rather modern, yet common approach, the means of actuation are formed by a push button (or two push buttons, one for discharging a larger volume of water and the other for discharging a smaller volume of water), which is located on the top wall (in particular, on lid) of the tank, so that the user needs to press the push button into the tank to drain the water. Of course, in this case, a system is needed that will provide a reverse movement of the push button at the level of the overlapping means, so that a downward movement of one or more push buttons provides an upward movement of the overlap means, and an upward movement of one or more push buttons provides a downward movement of the overlap means.

For this purpose, a lever reversing device is installed inside the tank, and this lever is installed with the possibility of rotation around the axis either on the fittings of the water drain mechanism installed inside the tank, or on the wall of the tank itself or on the lid. One of the ends of the lever is connected by means of a connecting rod to a push button, and the other end of the lever (opposite the first end relative to the axis of rotation) is connected to the overlapping means.

Such a mechanism is generally satisfactory and relatively reliable.

To install a water drain mechanism in the form of a push button, such as, for example, as described above, the tank cover is removed and a drain mechanism valve is installed inside the tank. Thus, the aforementioned connecting rod extending from the end of the lever return system is positioned above the fittings of the water drain mechanism in a state of readiness to be connected to the push button.

The push button hollow body, inside which the push button is movably mounted, is fixed on the lid of the pot, then the lid is installed on the pot, while the installer must make sure that the position of the connecting rod matches the position of the push button.

It should be noted that usually the manufacturer offers a mechanism for draining water in one model, which can be changed in accordance with different sizes of tanks. Tanks, in turn, can differ significantly from each other in shape and size, in particular in height.

Thus, in certain cases, the space available in height inside the tank is less than the height of the fixture of the water drain mechanism installed in the tank, consisting of the height of the return lever system and the height of the connecting rod. In this case, it is impossible to install the lid on the tank, as the connecting rod protrudes beyond the upper edge of the tank.

In such a situation, the installer traditionally adjusts the height of the connecting rod, changing its parameters accordingly.

However, there is currently a trend towards a significant reduction in the height of some tanks.

However, when using push-button drains, such as those described above, it is not possible to reduce the height of the cistern beyond a certain limit determined by the height of the drain fittings together with the height of the lever return system.

In any case, the height of the entire water drain mechanism installed inside the tank depends on the volume of water released, so the designer of the water drain mechanism cannot change the height of the mechanism fittings. The only thing that the designer of this type of mechanism can do is to reduce the height above the fittings installed at the bottom of the tank.

To reduce the remaining height, it was proposed to install a lever return system in a hollow housing in which a push button is installed.

A similar mechanism for draining water is disclosed in a patent document published under the number FR 3031527.

This mechanism contains:

- a hollow body fixed on the lid of the tank;

- a push button mounted in a hollow housing with the ability to move between the initial position and at least one pressed position;

- an armature installed inside the tank and containing a means of overlap, made with the possibility of moving between the position of the overlap and the opening position of the opening for the release of water, made in the bottom wall of the tank;

- a transmission mechanism between a push button and a means of overlap, comprising:

- a pull rod connected to the overlap means, the pull rod passing through the lower channel of the hollow body and being movable in height relative to the hollow body;

- a return lever system housed in a hollow body, the return lever system comprising a lever rotatable around an axis to reverse the height of one or more push buttons relative to the height of the pull rod.

However, in such a water drain mechanism, a pull rod can be installed between the lever return system and the closing means, and the installer will need to adapt the height of such a pull rod. However, due to the installation of a lever return system in a hollow body, the installer has more room to work with a significantly reduced cistern height.

This mechanism also contains means for locking the traction rod in height relative to the hollow body, which allows you to lock or unlock the position of the traction rod relative to the hollow body in which the push button is located. These interlocks can take many forms and provide the installer with the ability to do the following:

- first engage the drawbar lock by operating the push button to set it to the specific configuration;

- perform the installation operation;

- at the end, unlock the traction rod by acting on the push button so that it leaves the particular configuration it has occupied.

Using the height locking means, the installer will be able to lock the height of the drawbar in relation to the hollow body, this time with the lid mounted on the reservoir. By fixing the position of the traction rod relative to the hollow body, it becomes possible to connect the traction rod to the overlapping mechanism located in the tank (and vice versa, if the traction rod can move freely, when trying to connect it to the mechanism placed inside, it will rise).

Such a mechanism is a simplified way of adjusting the height of the rod connecting the push button to the overlapping means.

However, the installer must not forget to lock the height of the rod when connecting it to the mechanism placed inside. Also, he must not forget to unlock the position of the drawbar in order to be able to use the drain when the push button is actuated, otherwise it will be locked along with the drawbar.

To complicate matters further, the installer would have to repeat this action several times to fine-tune the height of the drawbar relative to the internal mechanism in the reservoir.

Therefore, the purpose of the present invention is to eliminate such shortcomings of the prior art to which the present invention relates.

More specifically, the aim of the present invention is to provide a push-button water drain mechanism with a more simplified installation compared to prior art solutions.

Thus, it is an object of the present invention to provide a mechanism that will allow the installer to seamlessly lock and unlock the drawbar during installation and commissioning of the water drain mechanism.

It is also an object of the present invention to provide a water drain mechanism whose improved design will not affect the user's experience.

These and other objects, which will become clear in the following, are achieved by the present invention, the object of which is a water flushing mechanism designed to be installed in a water tank of a toilet bowl, comprising:

- a hollow body made with the possibility of fixing on the lid of the tank at least one push button, installed with the possibility of moving along the height in the hollow body between the initial position and at least one pressed position;

- an armature installed inside the tank and containing a means of overlapping, made with the possibility of moving between the position of the overlap and the opening position of the opening for the release of water, made in the bottom wall of the tank;

- a transmission mechanism between one or more push buttons and a means of overlap, comprising:

- a traction rod connected to the overlapping means, the traction rod passing through the lower channel of the hollow body and being movable in height along the axis of movement T relative to the hollow body;

- a return lever system housed in a hollow body, the return lever system comprising a lever rotatable about an axis of rotation R to reverse the height of one or more push buttons relative to the height of the pull rod.

- means of blocking the traction rod in height relative to the hollow body,

characterized in that in the initial position of one or more push buttons, the lever occupies the position of locking the traction rod in height, while one or more push buttons are connected to the lever to rotate the lever and, after actuating one or more push buttons, to remove it from the lock position.

In other words, the lever of the lever return system is also part of the means for locking the traction rod in height relative to the hollow body.

As used herein, the term “height lock” means that bottom-up and top-down movement of the drawbar is blocked.

With the mechanism of the present invention, the installer does not need to take any special action to lock or unlock the drawbar position when one or more push buttons are in their home position.

In fact, the height lock of the drawbar is carried out at the moment when one or more push buttons are in their original position. In this position, the lever assumes the drawbar height lock position.

Height-locked drawbar simplifies installation of the water drain mechanism.

This height locking of the drawbar is carried out automatically during normal drain operation and also during installation.

Compared to the mechanism of the prior art, which comprises a lever return system housed in a hollow body, in the mechanism of the present invention, when one or more push buttons are in the rest position, the pull rod protrudes from the hollow body and the push force , acting on the traction rod in the direction of the hollow body, does not allow the traction rod to return to the hollow body. Only the action of one or more push buttons can effectively unlock the drawbar and return it back inside the hollow body.

In this way, while the drawbar is locked in the lowered position, during the installation of the push button on the tank, adjustment is simultaneously made by inserting the drawbar to a predetermined depth for proper engagement with the overlapping means. An example of installation and automatic adjustment of the water drain mechanism is described in more detail below.

According to a preferred embodiment, the water drain mechanism comprises means for resetting one or more push buttons.

These means for resetting one or more push buttons also have the function of returning the lever to the height lock position of the drawbar. Thus, the drawbar lock remains active throughout the installation operation of the mechanism, or automatically becomes active if the installer accidentally presses one of the push buttons. Of course, after the mechanism has been installed, the return of one or more push buttons to its original position is used only as part of the normal operation of the water drain mechanism.

Preferably, the lever comprises a gear mounted on a rotation axis R, the gear being engaged with a rack attached to one or more push buttons.

Such a mechanical connection effectively connects one or more push buttons to the lever, and also drives the lever during lowering or raising one or more push buttons.

Also, this design is characterized by small dimensions, a small number of components and ease of installation.

According to the preferred embodiment:

- a groove is made in the traction rod;

- on the lever there is a pin mounted on the axis of rotation R with an offset relative to the center, the pin is parallel to the axis of rotation R and is inserted into the groove with the possibility of sliding movement.

The groove and pin assembly allows for a sense of release (higher initially and then gradually decreasing) when one or more push buttons are pressed.

The groove may be provided to increase the force applied to the cover means to move it out of the cover position (the position where the water in the tank exerts a significant force to hold the cover means in the bottom position of the cover).

In other words, the pin and slot allow the curved path of the pin (rotation of the lever) to be converted into a straight path of the drawbar. The shape of the slot (straight, curved, slanted, etc.) allows you to change the distance traveled by the drawbar for the same degree of rotation of the lever, depending on the angular position of the lever.

Preferably the lever is movable between:

- up position when one or more push buttons are pressed;

- a lower position, when one or more push buttons are in their rest position, whereby the lever can be rotated from the lower position to the upper position in the first direction of rotation, while in the second direction of rotation, opposite to the first direction of rotation, the lever reaches the stop,

and the lever in the lock position is tilted about the movement axis T in the second direction of rotation.

The lower position of the lever also corresponds to the lock position.

Blocking of the traction rod in height is provided by the design features of the movement mechanism. Indeed, in the locked position (or lower position) of the lever, the lifting of the drawbar in the hollow housing is blocked by the lever.

Such locking is provided by the position of the lever, which is in the stop reached in the second direction of rotation, the force acts on the traction rod in the direction of the hollow body, causing the traction rod to act on the lever and press the lever against the stop in the second direction of rotation.

In other words, the force exerted on the drawbar in the direction of the hollow body is:

- causes the lever to rise to the upper position, turning it in the first direction of rotation, in case the lever is not in the locked position;

- prevents the lever from rising to the top position if the lever is in the locked position, due to the fact that the drawbar abuts against the lever in such a way that it tends to turn in the second direction of rotation, and not in the first direction of rotation.

According to a preferred aspect, the groove is provided with a recessed bottom guide into which the pin enters when one or more push buttons are in their rest position.

In this case, the recess is part, even forms part of the locking means. This notch improves the lever's ability to stay in position.

blocking. It is enough to act on one or more push buttons to turn the lever and remove the pin from the recess.

In accordance with another preferred aspect, the pin is characterized by the presence of a flat, the shape of which is complementary to the shape of the groove in the locking position of the lever.

The flat also forms part of the locking means. It helps to optimize the contact between the surface of the groove in contact with the pin when the lever is in the locked position. Such a flat allows the distribution and centering of the forces acting on the lever in the locked position when the pull rod exerts pressure towards the hollow body (for example, during installation of the water drain mechanism in accordance with the present invention). Thus, the flat helps to stabilize the lever in the locked position.

According to a preferred embodiment, the locking means comprise:

- locking stop, made extended in a plane perpendicular to the axis of movement T of the traction rod;

- a seat, the shape of which is complementary to the shape of the blocking stop,

one of the lever or hollow body contains a blocking stop, the other of the lever or hollow body contains a socket, the blocking stop and the socket interact with each other in the initial position of one or more push buttons to lock the traction rod in height.

Such a locking stop and complementary socket increase or increase the ability of the lever to lock the drawbar in place.

The force acting on the drawbar when the lever is in the locked position results in a basing on a plane between the locking stop and one of the socket surfaces, which is configured to prevent or at least significantly limit the ability of the lever to rotate about the axis of rotation.

Preferably, the groove is extended perpendicular to the movement axis T of the traction rod.

Thus, the execution of the groove is simplified.

In addition, due to the design of the groove, the release of the overlap means is facilitated.

The pin travels in an arc and does not rise and fall from the same height at which the lever takes a horizontal or vertical position.

Other characteristics and advantages of the present invention will become more apparent upon reading the description of preferred embodiments of the present invention, given by way of illustrative and non-limiting examples, made with reference to the accompanying figures, in which:

- in Fig. 1 is a perspective sectional view of a toilet cistern equipped with a push-button flush mechanism in accordance with the present invention;

- in Fig. 2 is an exploded view of the push button, hollow body, and gear mechanism;

- in Fig. 3a, 3b and 3c show sectional views of the transmission mechanism when the push buttons are in their rest position, partially recessed and fully depressed, respectively;

- in Fig. 4a, 4b and 4c are sectional views from the opposite side shown in FIG. 3a, 3b and 3c

- in Fig. 5a and 5b are sectional views from different sides of the transmission mechanism according to the second embodiment;

- in Fig. 6 is a sectional view of the transmission mechanism according to the first embodiment corresponding to FIG. 3a, 3b and 3c;

- in Fig. 7 is a sectional view of a transmission mechanism according to the third embodiment;

- in Fig. 8 is a sectional view of a transmission mechanism according to the fourth embodiment;

- in Fig. 9 is a sectional view of a transmission mechanism according to the fourth embodiment;

- in Fig. 10, 11 and 12 are sectional and perspective views of a transmission mechanism according to a fourth embodiment from different angles.

In FIG. 1 shows a water drain mechanism in accordance with the present invention, designed to be installed on a water tank 1 of a toilet bowl and comprising:

- a push button 2, in particular two push buttons, one of which is designed to drain a larger volume of water, and the other to drain a smaller volume of water, designed to be installed on the lid 10 itself, made with the possibility of being placed on the upper edge 100 of the tank to close it , while the push buttons are movable from top to bottom, and vice versa;

- an armature 3 installed inside the tank and containing a means 30 of overlap, made with the possibility of moving between the lower position of the overlap, in which it covers the hole 11 for the release of water made in the lower wall 12 of the tank at its base, and the upper position of the opening of the hole 11 for the outlet water (in which it is possible to release a smaller or larger volume of water in the direction of the toilet bowl);

- a transmission mechanism 4 between the push buttons 2 and the closing means 30, comprising, in particular, a return lever system 40 configured to reverse the push buttons in height relative to the height movement of the closing means 30.

Thus, the lever return system is designed to convert the movement of the push buttons from top to bottom (which corresponds to the pressing of one or more push buttons) into the movement of the cover means from the bottom up (leading to the drainage of water) and, conversely, to convert the movement from top to bottom of the cover means to the movement from below up one or more push buttons. This corresponds to the usual way of operating the push buttons of the water drain mechanisms, according to which, when the user presses the push button, the water is drained (the closing means moves to the upper position), and after the closing means is in the position of closing the hole for draining water from the tank, that is, the down position, moving it down causes one or more push buttons to rise to their original position.

In addition, it should be noted that the fittings (or housing) of the water drain mechanism located inside the tank may contain various components, the design and functionality of which are known from the prior art, in particular:

float, made with the possibility of adjustment and intended for

stopping the flow of water inside the tank;

overflow system;

saddle with the possibility of quick installation.

In FIG. 1 and 2 show a water drain mechanism in accordance with the present invention, comprising a hollow body 20.

The push buttons 2 are installed in a hollow housing 20, within which they can be moved from top to bottom and vice versa, while the hollow housing is designed to be connected to the lid of the tank. Such fastening of the hollow body to the container lid can be achieved by any suitable means, in particular by a screw system.

The push buttons 2 are vertically mounted in the hollow body 20 between the initial position and at least one depressed position.

As will be described in detail later, one of the push buttons 2 is connected to the rack 200.

In FIG. 1 and 2 show a water draining mechanism also containing means 5 for resetting the push buttons. Such return means are springs 50.

As shown in FIG. 2, 4a, 4b and 4c, the hollow body 20 has a bottom channel 21. The bottom channel is at the level of the bottom wall of the hollow body. The lower channel is more precisely centered on the lower wall of the hollow body and is characterized by a circular cross section.

As shown in FIG. 1, the transmission mechanism 4 also includes a pull rod 42 configured to be connected to the overlapping means 30. The pull rod is designed to entrain the means of overlapping to move it in height and open a hole for water release, made in the lower wall of the tank.

The pull rod 42 passes through the lower channel 21 of the hollow body 20. It is made to move in height along the axis of movement T relative to the hollow body.

As shown in FIG. 1, the drawbar 42 is movable, in particular between:

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

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

More specifically, as shown in FIG. 2-12, the drawbar 42 is characterized by having a head 421 located within the hollow body 20 and a stem 422 extending from the head 421. In FIG. 3a-4c show a drawbar movable along an axis of movement T, with a rod 422 slidable through the lower channel 21 of the hollow body.

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

Also provided in the drawbar 42 is a slot 420. This slot 420 is located on the head 421 of the drawbar 42 and is intended to form a swing-and-slide assembly with the return system, which will be described in more detail below.

The groove 420 is made perpendicular to the axis of movement T of the traction rod 42.

In FIG. 4a-12 show a slot 420 having a lower guide 4201 and an upper guide 4202.

As described above with reference to FIG. 2-12, a lever return system 40 is located within the hollow body 20. This return system is connected to the push buttons 2 and the pull rod 42 in such a way as to allow the push buttons to retract in accordance with the movement performed by the pull rod 42 and, as a result, the means 30 overlap.

To do this, the return system 40 includes a lever 41, which is rotatable about the axis of rotation R.

The lever 41 is provided with a gear wheel 410 centered on the rotation axis R. This gear wheel 410 meshes with a rack 200 connected to one of the push buttons 2.

Thus, pressing the push button 2 results in rotation (or rotation) of the lever 41 around the rotation axis R.

Also, the lever 41 is characterized by the presence of a pin 411 offset from the center of the axis of rotation R. This pin 411 is parallel to the axis of rotation R. The pin 411 has a cylindrical shape that is complementary to the shape of the groove 420, while the lever pin is inserted into the groove with the possibility of sliding movement inside the groove. Together, the pin and groove form a pivot-sliding assembly. Pin 411 is specifically attached to lever arm 412 which extends to gear wheel 410.

In accordance with the present invention, in the initial position of one or more push buttons, the lever is in the position of locking the traction rod in height, while one or more push buttons are connected to the lever to rotate the lever and, after actuating one or more push buttons, its removal from the lock position .

The water drain mechanism also contains means 7 for locking the traction rod in height relative to the hollow body. These locking means and the locking position of the lever ensure that the drawbar 42 is locked in the lowered position.

According to FIG. 1, the water draining mechanism advantageously comprises means 6 for connecting the drawbar 42 with the overlapping means 30 by bringing them into contact.

These funds are, in particular:

- notches 60 made on the rod 422 of the traction rod 42, in this case, the cuts on the rod 422 are located with equal spacing, and

- corrugated casing 61, complementary to the rod 422, and fixed to the means 30 overlap.

The knurled case is designed to insert the rod 422 in the direction of insertion and to fix the stem in the knurled case while moving the drawbar in the opposite direction of the insertion. Thus, the pull rod raises the floor means.

As shown in FIG. 1, the drawbar 42 includes a stem 422 which is long enough to adjust the height of the coupling of the drawbar 42 with the overlapping means 30. Such adjustment is carried out during the gradual insertion of the rod 422 of the traction rod 42 into the corrugated casing 61. After mounting the hollow body on the tank cover and installing the cover on the tank, the rod is inserted to the depth required for the operation of the mechanism.

More specifically, after adjusting the height of the drawbar relative to the overlapping means described above, the closing means assumes a lower overlapping position when the drawbar is in the lowered position and one or more push buttons are in the rest position.

Due to this design of the mechanism according to the present invention, the installer can carry out the installation without any difficulty.

Due to the fact that in the rest position of one or more push buttons the pull rod of the mechanism according to the present invention is in the lowered position, the installer does not need to perform special operations to lower the pull rod or keep it in the lowered position during:

- adjusting the height of such a drawbar, or

- during installation of the hollow body on the lid (the lid is installed on the tank) or during the installation of the lid on the tank (the hollow body is pre-installed on the lid), the pull rod is mated with the means of overlap at the required height.

As described above, installation of the water drain mechanism in accordance with the present invention is facilitated by a lever that assumes a drawbar height lock position when one or more push buttons are in their rest position.

More specifically, the lever 41 is movable between:

- the lower position in the initial position of one or more push buttons 2 (Fig. 3a and 4a);

- the top position when one or more push buttons 2 are pressed (FIGS. 3c and 4b).

The lever 41 is rotatable from a lower position to an upper position in a first rotation direction and from an upper position to a lower position in a second rotation direction opposite to the first rotation direction.

During movement from the lower position, the lever 41 reaches the stop in the second direction of rotation, which is opposite to the first direction of rotation.

The lower position of the lever corresponds to the height lock position of the drawbar.

The principle of operation of the lever return system and the rotary-sliding unit is shown in Fig. 3a - 4s.

As can be seen in these figures, pressing the push buttons 2 lowers the rack 200, rotates the arm 41 around the axis of rotation R from the locked position (or lower position) to the upper position, and consequently raises the drawbar 42 from the lowered position to the raised position.

According to this embodiment, a given angular movement does not result in a linear movement of the same distance, depending on whether the lever 41 is near the bottom position (the lever 41 is directed towards the bottom wall of the hollow body 20) or near the intermediate position, in which the shoulder 412 of the lever 41 is parallel to the groove 420 (or perpendicular to the axis of movement T of the traction rod).

The means 7 for blocking the height of the rod can be implemented in different ways.

According to the embodiment shown in FIG. 5a and 5b, the lever 41 in the lock position is inclined with respect to the axis of movement T in the second direction of rotation.

This inclination, as well as the complementarity of the return means 5 (shown in FIG. 2) which hold the push buttons 2 in their rest position (and hold the lever 41 in the locked position), cause the raised drawbar 42 to press the lever 41, pushing it in the second direction of rotation. In the locked position, however, the lever 41 reaches a stop in the second direction of rotation, ie the lifting of the drawbar 42 is blocked by the lever 41, which cannot be rotated in the second direction of rotation.

In other words, as shown in FIG. 5a, the lever 41 is inclined with respect to the axis of movement T in the second direction of rotation. The lever also reaches the stop in the second direction of rotation. This means that the lever 41, rotated in the second direction of rotation from the top position to the lock position, must be in the equilibrium position (or intermediate position).

Such an equilibrium position (or intermediate position) corresponds to a state of the arm in which, during lifting, the drawbar 42 will rotate in the second direction of rotation or in the first direction of rotation.

In accordance with this embodiment, such an intermediate position corresponds to the position occupied by the lever 41 when it is parallel to the axis of movement T of the drawbar 42. Upon leaving this equilibrium position during lifting, the drawbar 42 pushes the lever, turning it in the second direction of rotation.

When the push button is actuated, the arm 412 of the lever 41 must pass through this intermediate position (where it is in line with the axis of movement T of the drawbar), then it will rotate in the first direction of rotation.

As shown in FIG. 6-10, and similarly to all embodiments, the lever 41 assumes a locked position in which the arm 412 of the lever 41 is parallel to the axis of movement T of the drawbar 42.

Thus, the arm 41 is in a state in which, during lifting, the drawbar 42 will rotate in the second rotation direction or in the first rotation direction. However, the lever in the second direction of rotation reaches directly to the stop, the pin is in the end position of the stroke inside the groove.

Rotation blocking means 7, complementary to the blocking position of the lever 41, make it possible to stabilize the lever in the blocking position along the height of the drawbar 42.

According to the embodiment shown in FIG. 6, locking means 7 contain:

- blocking stop 70, made extended in a plane perpendicular to the axis of movement T of the traction rod;

- seat 71, the shape of which is complementary to the shape of the blocking stop 70,

a hollow body 20 containing a locking stop 70 and a lever 41 containing a socket, the blocking stop and the socket cooperating with each other in the initial position of one or more push buttons to lock the drawbar in height.

When the push buttons 2 are in their original position, the lever 41 is positioned so that the lifting of the traction rod 42 is blocked by the lever due to the setting in the blocking position and the interaction of the blocking stop 70 with the socket 71.

More specifically, pressing the traction rod 42 on the lever 41 along the axis of movement T leads to the interaction of the blocking stop 70 with the socket 71, resulting in a basing on the plane to stabilize the lever in the locked position and prevent the lever 41 from rotating around the axis of rotation R in the first direction of rotation.

In other words, the blocking stop 70 is a bulge in the hollow body, which is included in the cavity formed by the lever 41, the interaction of the bulge with the cavity prevents the lever from moving along the axis of movement T of the traction rod.

Such an embodiment of the locking means also makes it possible to avoid affecting the operation of the push button during the draining of the water. During the action on the push button, the user will not feel any additional resistance, except for the resistance from the return means and the water in the tank. There is no resistance due to the fact that the lever will be released from the lock position.

According to another embodiment shown in FIG. 7, the pin 411 includes a flat 413, the shape of which is complementary to the shape of the slot 420 in the rest position of one or more push buttons 2.

This flat 413 provides basing on the plane between the flat 413 of the lever 41 and the bottom guide 4201 of the slot 420 in the initial position of the lever 41.

In accordance with this embodiment, the flat 413 and at least the part of the lower guide 4201 in contact with the flat are part of the planes perpendicular to the axis of movement T of the drawbar 42.

This design of the flat makes it possible to stabilize the lever 41 in the locked position during the action of the force on the traction rod 42 to lift it into the hollow body 20.

The flat and part of the lower guide can also be oriented so as to cause rotation of the lever in the second direction of rotation when the lever is in the rest position and the pull rod is subjected to a force to lift it into the hollow body. In this case, being in the initial position, the lever is not able to turn in the second direction of rotation and blocks the pull rod in height.

According to another embodiment shown in FIG. 8, the bottom guide 4201 of the slot 420 includes a recess 4200 which receives the pin 411 of the lever 41 in the rest position of one or more push buttons 2.

This notch 4200 provides a gap to allow the drawbar 42 to slightly lift when the lever 41 is in the locked position, thereby allowing the pin 411 to enter the notch 4200.

Thus, the drawbar is locked in height and cannot rise into the hollow body solely by the force exerted on the drawbar when the lever is in the locked position.

More specifically, when the pull rod 42 is subjected to a force to lift it into the hollow body 20, the pull rod rises slightly and the pin 411 of the lever 41 (which is in the locked position) enters the recess 4200. In this case, the interaction of the pin with the recess ensures that the lever is stabilized. in the locked position by restricting rotation in the first direction of rotation by the step formed by the notch 4200 relative to the lower guide 4201. To perform rotation in the first direction of rotation, the pin must exit the notch and overcome the step. Thus, the recess takes part in stabilizing the lever in the locked position during the action of the force on the traction rod.

According to the fourth embodiment shown in FIG. 9-12, the locking means 7 comprise a locking stop 70 located directly above the pin 411 of the lever 41, along the axis of movement T of the pull rod 42 in the initial position of one or more push buttons 2.

According to FIG. 9 and 12, according to this embodiment, the blocking stop 70 is formed by a rib 201 located in the hollow body 20.

The rib is located longitudinally along the axis of movement T of the traction rod 42.

Rib 201 is characterized by the presence of a shoulder 202, which in the initial position of one or more push buttons 2 is located directly above the pin 411 of the lever 41 or in contact with it.

The shoulder makes it possible to create a support surface on which the pin 411 of the lever 41 will ultimately rest during the action of the pull rod force along the axis of movement T in the direction of the hollow body when the push buttons 2 are in their initial position. Located on the rib 201, the support surface formed by the shoulder 202 makes it possible to distribute the stresses created by the pin during such an event on the hollow body.

Of course, the arm and the support surface are designed (in shape and orientation) to hold the lever in the locked position when the push button is in its rest position and the force to lift the drawbar into the hollow body acts on said rod.

Also, due to its size, the shoulder completely rises above the pin along the axis of movement T, when the push button is in its original position.

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

Also an advantage of this embodiment is its exceptional strength, in particular exceeding the strength provided by the embodiment shown in FIG. 6.

If the pull rod is subjected to the force described above, stresses will occur mainly on the rib 201 and therefore on the hollow body 20, and not on the axis of rotation of the lever 41.

Such different embodiments of the locking means may be combined in whole or in part with others. Of course, it may be necessary to adapt certain characteristics of the various embodiments according to the combination being performed.

For example, a recess can be made in the groove, and a flat in the pin, the shape of which will be complementary to the shape of the recess.

Claims (23)

1. The mechanism for draining water for installation on the water tank (1) of the toilet, containing: - a hollow body (20) fixed on the lid (10) of the tank; - at least one push button (2) installed in the hollow body with the possibility of moving in height between the initial position and at least one pressed position; - armature (3) installed inside the tank and containing a means of overlap (30), made with the possibility of moving between the position of the overlap and the opening position of the hole (11) for the release of water, made in the bottom wall (12) of the tank; - a transmission mechanism (4) between one or more push buttons and a means of overlap, comprising: - a pull rod (42) connected to the overlapping means, the pull rod passing through the lower channel (21) of the hollow body and being movable in height along the axis of movement T relative to the hollow body; - a return lever system housed in a hollow body, the return lever system comprising a lever (41) rotatable about an axis of rotation R to reverse the height of one or more push buttons relative to the height of the pull rod; - locking means (7) of the pull rod in height relative to the hollow body, characterized in that in the initial position of one or more push buttons, the lever takes the position of locking the pull rod in height, while one or more push buttons are connected to the lever to rotate the lever and after actuating one or more push buttons to release it from the lock position, the lever (41) contains a gear wheel (410), the center of which is installed on the rotation axis R, while the gear wheel is engaged with a rack (200) connected to one or several push buttons (2). 2. The mechanism for draining water according to the preceding paragraph, characterized in that it contains means for returning (5) one or more push buttons (2) to its original position. 3. Water drain mechanism according to any one of the preceding claims, characterized in that: - a groove (420) is made in the traction rod (42); - on the lever (41) there is a pin (411) mounted on the axis of rotation R with an offset relative to the center, the pin is parallel to the axis of rotation R and is inserted into the groove with the possibility of sliding movement. 4. The water drain mechanism according to the preceding paragraph, characterized in that the lever (41) is movable between: - up position when one or more pushbuttons (2) are pressed; - a lower position, when one or more push buttons are in their rest position, whereby the lever can be rotated from the lower position to the upper position in the first direction of rotation, while in the second direction of rotation, opposite to the first direction of rotation, the lever reaches the stop, while in the lock position, the lever is tilted relative to the axis of movement T in the second direction of rotation. 5. The mechanism for draining water according to any one of paragraphs. 3 and 4, characterized in that the groove (420) contains a lower guide (4201) with a recess (4200) in which, in the initial position of one or more push buttons (2), a pin (411) enters. 6. The mechanism for draining water according to any one of paragraphs. 3-5, characterized in that the pin (411) contains a flat (413), the shape of which is complementary to the shape of the groove (420) in the locking position of the lever (41). 7. The mechanism for draining water according to any one of paragraphs. 3-6, characterized in that the blocking means (7) contain: blocking stop (70), made extended in a plane perpendicular to the axis of movement T of the traction rod (42); seat (71), the shape of which is complementary to the shape of the blocking stop, one of the lever (41) or hollow body (20) contains a blocking stop, the other of the lever or hollow body contains a socket, while in the initial position of one or more push buttons (2) the blocking stop and socket interact with each other to block the traction rod in height. 8. The mechanism for draining water according to any one of paragraphs. 3-7, characterized in that the groove (420) is perpendicular to the axis of movement T of the traction rod (42).

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