Abstract:
A device having mechanisms for lifting and lowering the cover and the seat of a toilet (WC), including a structure fixed to the rear part of the mouth of a WC bowl and housing a first axle and a second axle arranged co-linearly and separated at the ends thereof. The first and second axles include, on the adjunct co-linear ends, a first cam and a second cam designed to receive and hold the end of a first cable and a second cable. The ends of the cables respectively connect to a first pedal element and a second pedal element that are independent of each other, but mounted in a single structure. The device can include a mechanism actuated by a hydraulic piston in order to lower the cover and seat automatically when the WC tank is emptied.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to means and devices used in toilets or lavatories; particularly relates to means used to raise and lower the lid and seat of a toilet without direct contact with the hand and more specifically is referred to a novel device with pedal drive mechanism and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet independently or simultaneously. 
       BACKGROUND OF THE INVENTION 
       [0002]    As is well known, toilets commonly used, are shaped in such a way that structurally comprise a bowl consisting of a body having a central cavity of round or oblong hole, with an internal trap which discharges by a base fixed to floor and where the exit of the trap is connected to the sanitary drainage network; said bowl comprising an upper tank where a volume of water is deposited, which is connected through a duct with said bowl; wherein said ducts comprise a ball-cock supply valve with driving means for discharging water into the bowl. 
         [0003]    A water supply conduit from a water supply source of domestic network or public network is connected directly into the water storage upper tank, comprising or not a control bypass valve; wherein said tank comprises valve means controlled by a float element to control the volume of water to be stored and discharged to the toilet, to dislodge micturitions and/or feces. 
         [0004]    The toilet bowl hole comprises in the back part, some orifices where are inserted fixing means for a collapsible bowl hole cover lid and seat which are in a round or horseshoe shape, disposed below the lid and over the edge of the bowl hole, that is used for reasons of hygiene to prevent the user from having direct contact with the toilet surface, as well as provide greater comfort to the user. 
         [0005]    The covering lid of the bowl consists of a solid body similar to the hole shape (round or oblong) and the seat has an annular or elliptical shape that follows the contour of the bowl hole, some seats are shaped like a horseshoe. Said seat is used so that people to sit on it and avoid direct contact with the bowl surface; in some cases the seat is padded for comfort, while the lid allows covering the bowl hole. 
         [0006]    When a female person uses the toilet, usually tends to lift the lid with at least one hand, which implies contamination, poor hygiene, etc. 
         [0007]    As for a male person, is well known existing problems, as when a man only seeks urinate, usually if it has a good habit, lifts with his hands both the lid and seat to avoid splashing the seat with urine and keep clean the seat, when the toilet is used to defecate, with the sanitary implications already indicated by the direct contact of the hand with the lid and seat, but in many cases the man, only lift the lid, or if the lid is already raised, they do not raise the seat, which imply that when they urinate splash and get wet with urine the seat, causing displeasure in other users and causing contamination of the lid that could be a source of infection for other users, especially when some of these users who have bad habit and do not lift the lid, have some infectious disease contagious through urine. 
         [0008]    In the prior art were found various mechanisms and mechanical devices, hydraulic and pneumatic that allow lift the toilet lid and/or seat, as an example are cited the following documents as reference, the patent application PA/a/2001/006808, the patent Application GB 2376475 (A), the utility model MX1636, the Mexican patent application Pa/a/2006/012503, the U.S. Pat. No. 4,291,422, among others. 
         [0009]    Also in the patent application by the same inventor Carlo Gomez Spain Collignon MX/a/2009/005262 filed May 18, 2009, entitled hydraulic driving device for raising and lowering the cover lid and seat of a toilet, and driving method, as in the patent application also by the same inventor MX/a/2009/009461 also filed Sep. 4, 2009, which has already been granted and is in the process of issuing the corresponding title. Said application relates to improvements to the hydraulic driving device for raising and lowering the covering lid and seat of a toilet, makes a remembrance of the state of the art and described the major drawbacks of various devices that perform the same operation, which are made extensive to the present description by reference. 
         [0010]    Patent application MX/a/2009/005262, is intended to protect a hydraulic driving device for raising and lowering the covering lid and seat of a toilet, characterized by comprising a casing comprising two hollow chambers attached, one left and one right, the cameras housing a left rotatable shaft and a right rotatable shaft, respectively; both shafts comprise a counterweight fixedly rotatable together with the shaft within the chambers, each chamber also houses a left and right resilient diaphragm, attachment and interacting with the counterweights, said diaphragms comprise at least one connecting pivot where is connected a supplying duct and/or working fluid exit to actuate-push the counterweight when they are inflated with working fluid supplied by an automatic system or by a contact driving elements system and cause the turn of said shafts connected to a cover and a seat of a toilet, respectively, and which comprise at the back part, one left and one right connecting flanges with orifice through which is inserted one left and one right fixing bolts which is fixed at the ends of the rotatable shafts with the corresponding counterweights. 
         [0011]    The application MX/a/2009/009461 seeks protection of improvements for a hydraulic driving device to raise and lower the covering lid and seat of a toilet, of the kind formed by two left and right modules linked together, where each module has their respective elements and has the same conformation, characterized by said left and right modules comprise a casing, comprising internally an central transverse axis whose ends protrude and wherein said casing is internally divided into three semicircular recesses; the left axis end is attached to the lid and the right axis end to the seat, the opposite end being fixed to a drive plate of three flanges, remaining housed one flange in each cavity of the casing; also being housed in each cavity a cylindrical diaphragm attached to each of the flanges, which when are filled with water pressed the flanges simultaneously causing partial turn of the axes which being coupled to the lid (left axis) or to the seat (right axis) are lifted together or separately or folded down on its rotary displacement when discharged; said diaphragms are connected and fed via check valve, first adapted to allow the passage of water supply to fill up the diaphragms when one of the actuating valves is actuated by the foot or hand arranged on the floor in the left and right side of the toilet, and second to drain the water and empty the diaphragms through a pipeline to the toilet tank when the toilet button is actuated to discharge the same and activate the check valve; said left and right valves of foot actuation are connected to a general water distributor and is connected to the water supply duct of the supply network which supplies the toilet tank. 
         [0012]    In both applications the devices operate based on diaphragms that must be filled with water to drive some shafts through some flanges, which are attached at their ends to a cover and seat to raise and lower in their turns. The device offers multiple embodiments in the two applications, but requires of multiple hydraulic connections that make complex the assembly, the operation and activation by the user. 
         [0013]    Also involves the installation of large, bulky bodies for multiple connections and water distributions and their installation is complex, time-consuming and requires specialized personnel among other multiple disadvantages. 
         [0014]    Most of these devices are actuated using hydraulic elements which use the water supply from a supply source so that by means of hydraulic actuators drive various mechanisms for lifting the lid and seat simultaneously or separately, but these devices with hydraulic actuators are costly, complex and require special connections; in some cases require solenoid valves with presence sensors that increase costs considerably, besides requiring trained personnel for installation. 
         [0015]    Devices are known which can be actuated by pedal, but these pedals comprise valve means that regulate water flow into a mechanism to raise the lid and seat, so that requiring connections and hydraulic lines, as well as actuation means operating with the water power so as to raise and lower the lid and seat. 
         [0016]    In any document located is protected or disclosed a device with pedal drive mechanism without the intervention of valve or hydraulic actuators to lift the lid and seat and optionally include hydraulic means for lowering the lid and seat automatically after to discharge the water from the tank when the toilet has been used. 
         [0017]    The device as is conceptualized is novel as it is designed and developed after multiple tests, developments, research, investment of financial, personnel and supplies resources, which has allowed obtaining the device object of the present invention. 
       OBJECT OF THE INVENTION 
       [0018]    The main object of the present invention is to make available a device with pedal drive mechanisms to raise the lid and seat of a toilet and with hydraulic actuators to lower the lid and seat automatically, once toilet tank water is discharged to dislodge debris from the toilet. 
         [0019]    Another object of the invention is to make available such a device with pedal drive mechanisms to raise the lid and seat of a toilet and with hydraulic actuators to lower lid and seat automatically when the water tank is discharged, which also provide greater safety and hygiene to the toilet users. 
         [0020]    Another object of the invention is to make available such a device with pedal drive mechanisms to raise the lid and seat of a toilet and with hydraulic actuators to lower the lid and seat automatically when the water tank is discharged, which also avoids the possibility of infection by users, avoiding splashing the seat with urine. 
         [0021]    Another object of the invention is to make available such a device with pedal drive mechanisms to raise the lid and seat of a toilet and with hydraulic actuators to lower the lid and seat automatically when the water tank is discharged, which is also structurally simple, easy to manufacture, easy to drive and easy to install. 
         [0022]    Another object of the invention is to make available such a device with pedal drive mechanisms to raise the lid and seat of a toilet and with hydraulic actuators to lower the lid and seat automatically when the water tank is discharged, which is also easy to install, of simple structure, practical, functional and easy operation. 
         [0023]    And all those qualities and objectives that will become apparent from the description of the present invention supported by the illustrated embodiments. 
       SUMMARY OF THE INVENTION 
       [0024]    Generally the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet, in accordance with the present invention comprises a support structure housing a first rotatably axis and a second axis disposed collinearly and partially separated at their ends enclosed within said support structure; the first axis being longer and being attached at the end which protrudes laterally from said support structure at the back side part of the toilet lid; said second axis is short and protruding at its end opposite to said support structure to be affixed to the back side part of a toilet seat. 
         [0025]    The first axis attached at its end to the lid and the second axis attached at its end to the seat comprise fixedly at the collinear attached internal ends of the support structure, a first cam and a second cam, respectively, adapted to receive and hold the end of a first cable and a second cable; the two cables of each cam out from underneath the support structure and extends from the back part of the toilet by the sides to the front part thereof, the end of the first cable is connected to a first pedal element and the end of the second cable is connected to a second pedal element, independent of each other, but mounted in the same structure, to be actuated with a foot. 
         [0026]    In its preferred embodiment of the invention said first pedal, having attached the first cable extending and fixed to said first cam that is fixedly mounted on said first fixed axis at the lid, is wider than the second pedal, for identification. 
         [0027]    when is desired to lift the lid for use the toilet to defecate, the first wider pedal is pressed with the foot to retract the first cable that pulls the first cam making rotate to said first axis and being attached at its end to the lid, lifts, leaving the seat in normal position to use the toilet, said first pedal remains in actuated position without returning to its rest position. 
         [0028]    When is desired to lift the lid and seat simultaneously to use the toilet to urinate (in the case of a male person), are pressed simultaneously with the foot both the first pedal and second pedal, which pull the corresponding cables attached to said cams, joined in turn to said first and second axes connected to the lid and seat, respectively to lift them. 
         [0029]    in the event that the lid is already raised and is desired lift the seat, the first pedal is in actuated position and the second pedal should be at rest position, the latter is pressed with the foot to pull the second cable that pulls the second cam making rotate said second axis and being attached at its end to the seat, lifts it; in this case both pedals remain in actuated position without returning to its rest position. 
         [0030]    The pedals return to their rest position to be actuated when the lid and seat are lowered separately or simultaneously. To avoid this contact with the hand, the device may comprise optionally or jointly a mechanism activated with hydraulic piston to allow a second turn in the opposite direction of said axes and hence to lower the lid and seat simultaneously or independently and automatically when the water is discharged from the toilet tank once it has stopped using. 
         [0031]    Said support structure comprises a base comprising vertical support means where rest and rotate said first axis and second axis and a cover which is mounted on the base and is coupled to the same with attachment means, to internally protect the axes and actuation cams. 
         [0032]    The support structure is fixed to the toilet in the back part of the hole of said toilet, attached to the base of the water reservoir and employs a hollow fixing means penetrating through a hole formed in the toilet and which has screw means for fixing; through said hollow fixing means penetrate the pedal drive cables and through a hole formed in the base of said support structure. 
         [0033]    Said hydraulic piston actuated mechanism, comprises of a hydraulic piston whose rod makes an upstroke when pressurized water enter to said piston, to push and turn optionally a third cam mounted on said first axis fixed to said lid and to push simultaneously or separately a fourth cam fixed to a third hollow axis mounted on said first independent rotatably axis and fixed at one of its ends to said seat. 
         [0034]    Said hydraulic piston comprises a bottom connection where a water supply duct is connected from a supply source and housing internally a rod as upstroke element comprising a recoil enveloping spring, said piston comprising a first lower hole for entry of water which is in communication with a second transversal hole that allows the water supply through a side exit of the piston connected via a supply duct to the bottom outlet of the water storage tank of the toilet for filling it when discharged by effect of pressure differential. 
         [0035]    When the toilet is actuated to discharge the water from the tank and dislodge the waste from the toilet, is generated a pressure differential that allows the flow of pressurized water to the second fold-down piston from the supply source to fill the tank, and simultaneously drive the piston rod comprising fixedly at its upper end a cross shaped thrust cam, which in its upstroke abuts and pushes said third cam mounted on said first axis fixed to said lid and pushes simultaneously or separately a fourth cam fixed on a third hollow axis mounted on said first independent rotatably axis fixed at one end of said seat, so that allows fold-down the lid and seat simultaneously, or separately by effect of secure elements. 
         [0036]    Said hydraulic piston is fixed in the back and bottom parts to said toilet by means of a hollow fixing element which penetrate in a second orifice formed on said toilet, and also holds said base of the support structure to secure it at the same time over the toilet in the back part of the hole thereof, through said hollow fixing element the piston rod makes its stroke and penetrates through a second hole formed in the base of the support structure to drive the axes cams to lower the lid and seat as described. 
         [0037]    Said base support structure cover comprises secure elements to prevent fold-down or lower the lid folded and locking elements which lock the piston element to prevent fold-down or lower the lid and seat; said secure element comprises a horizontal travel button mounted in a horizontal groove of said casing and being connected to a guide rail element embracing a protrusion of said first cam, which being slidably embraced by said first elongate axis which is attached to the lid, can moves horizontally to remove said first cam and to avoid contact with the cross shaped thrust cam; in this way is disabled the axis of the lid and prevents the lid is lowered when the water tank is discharged, pushing only the second cam fixed to said third hollow axis mounted in said first independent rotatably axis and fixed at one of its ends to said seat in order to fold-dawn or lower the seat only. 
         [0038]    Said locking element comprises a button slidably mounted in a horizontal groove of the casing and which comprises fixedly a locking cam; so that when said button slides horizontally said locking cam moves obstructing the upstroke of the piston rod and avoids that when discharging the water tank of the toilet, the lid and seat lower automatically. 
         [0039]    To better understanding of the features of the invention, are attached to this description as an integral part thereof, the drawings with illustrative but not limiting character, as described below. 
     
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         [0040]      FIG. 1  shows an exploded view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet in accordance with the present invention. 
           [0041]      FIG. 2  shows a conventional perspective view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet, in the embodiment shown in  FIG. 1 . 
           [0042]      FIG. 3  shows a side view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet, with a cut in the support structure, in accordance with  FIGS. 1-2 . 
           [0043]      FIG. 4  illustrates a conventional perspective view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet, already installed in the toilet. 
           [0044]      FIG. 5  shows a left side view of a toilet with the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet. 
           [0045]      FIG. 6  shows a right side view of a toilet with the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet. 
           [0046]      FIG. 7  illustrates a conventional perspective view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet when the lid has been lifted. 
           [0047]      FIG. 8  illustrates a conventional perspective view of a toilet with the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet which has been actuated to lift the lid. 
           [0048]      FIG. 9  illustrates a conventional perspective view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet when has been lifted the lid and seat. 
           [0049]      FIG. 10  illustrates a conventional perspective view of a toilet with the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet which has been actuated to lift the lid and seat. 
           [0050]      FIG. 11  shows a rear view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet, showing the safe and lock elements of the cams. 
           [0051]      FIG. 12  illustrates a conventional perspective view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet with the hydraulic actuator mechanism which is actuated to lower the lid and seat. 
           [0052]      FIGS. 12   a  and  12   b  illustrate perspective conventional views of the hydraulic actuator mechanism which is actuated to lower the lid and seat simultaneously. 
           [0053]      FIG. 13  shows the hydraulic actuator mechanism that has been driven to lower the seat and showing the secure element which is actuated to disable the first cam of the first axis attached to the lid to prevent from is lowered, that is to said, when it is desired lowering only the seat. 
           [0054]      FIG. 14  illustrates a conventional perspective view of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet, when the lock element has been actuated to prevent the lid and seat to be lowered and keep them lifted. 
       
    
    
       [0055]    For a better understanding of the invention, the detailed description of some embodiments of the same will be made, shown in the drawings for illustration but not limiting purposes which are appended to the present description. 
       DETAILED DESCRIPTION OF THE INVENTION 
       [0056]    The characteristics details of the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid and seat of a toilet, are clearly shown in the following description and the appended illustrative drawings, serving the same reference signs to indicate the same parts. 
         [0057]    Referring to  FIGS. 1-6 , the device with pedal drive mechanisms and hydraulic actuator to raise and lower, respectively, the lid  8  and seat  9  of a toilet  18 , in accordance with the present invention comprises a support structure  1  comprising a base  2  comprising vertical support means  3  where rest a rotatably first axis  4  and a second axis  5 , and a cover  6  which is mounted on the base  2  and which is coupled thereto with fixing means  7 . Said first axis  4  and second axis  5  are arranged collinearly and partially separated at their ends enclosed within said support structure  1 ; the first axis  4  being longer and being attached at the end protruding laterally from said support structure at the back side part of the lid  8  of a toilet; said second axis  5  is short and protrudes at its end in the opposite side of said support structure  1  to be affixed to the back side part of a toilet seat  9 . 
         [0058]    The first axis  4  attached at its end to the lid  8  and the second axis  5  attached at its end to the seat  9  comprise fixedly with fixing means  10  at the collinear attached internal ends of the support structure  1 , a first cam  11  and a second cam  12 , respectively, adapted to receive and hold the end of a first cable  13  and second cable  14 ; the two cables of each cam out from underneath the support structure  1  and extending from the rear part of the toilet by the sides to the front part thereof; the end of the first cable  13  is connected to a first pedal element  15  and the end of the second cable  14  is connected to a second pedal element  16 , independent of each other, but mounted in the same structure  17 , to be driven with one foot. 
         [0059]    The support structure  1  is fixed to the toilet  18  in the back part of the hole of said toilet, attached to the base of the water tank  19  and is used a fixing hollow means  20  which penetrates through a orifice (not shown) formed in the toilet  18  and has threaded means  21  for fastening; through said fixing hollow means  20  penetrate the cables  13  and  14  of actuation with pedal and through an orifice  22  formed in the base  2  of said support structure  1 . 
         [0060]    Referring to  FIGS. 1-8 , when it is desired to lift the lid  8  for using the toilet to defecate, the first pedal  15  is pressed by foot to retract the first cable  13  which pulls the first cam  11  making rotate said first axis  4  and being attached at its end to the lid  8 , lifts it, remaining the seat  9  in a normal position to use the toilet, said first pedal  15  remains in actuated position without returning to its rest position. 
         [0061]    With reference to  FIGS. 1-10  and preferably  9  and  10 , in the condition where the lid  8  has been previously lifted as is shown in  FIGS. 7 and 8 , and it is desired lift the seat  9  for urinate (in the case of male person), the first pedal  15  will be in actuated position and the second pedal  16  should be at rest position, the latter is pressed by the foot to pull the second cable  14  which pulls the second cam  12  making rotate said second axis  5  and being attached at its end to the seat  9 , lifts it. In this case both pedals  15  and  16  remain in actuated position without returning to its rest position. 
         [0062]    In the case where it is required to lift the lid  8  and the seat  9  simultaneously to use the toilet to urinate (in the case of a male person), is pressed simultaneously with the foot, both the first pedal  15  and the second pedal  16 , which pull the corresponding cables  13  and  14  attached to said cams  11  and  12 , attached in turn to said first  4  and second  5  axes connected to the lid  8  and seat  9 , respectively, to lift them simultaneously. 
         [0063]    In the preferred embodiment of the invention, the device further includes a hydraulic piston actuated mechanism to allow a second turn in the opposite direction of said axes and hence to lower the lid and seat simultaneously or independently and automatically when water from the toilet tank is discharged, once it has stopped using. To explain it should be observed  FIGS. 1 ,  2 ,  5 ,  7 ,  9  and  11  to  12   b.    
         [0064]    In the referred figures, said hydraulic piston actuated mechanism to allow for a second turn in the opposite direction of said axes  4  and  5  and thus to lower the lid  8  and seat  9  simultaneously or independently and automatically when water is discharged from the toilet tank once it has stopped using, consists of hydraulic piston  23  which comprises a bottom connection where is connected a water supply conduit  24  from a supply source and which internally houses a rod  25  as upstroke element comprising a recoil enveloping spring  26 ; said piston  23  comprises a first bottom hole (not shown) to the water inlet being in communication with a second transverse hole (not shown) which allows the water supply through an side exit  27  of the piston connected through a supply conduit  28  to the lower intake of the water storage tank  19  of toilet  18  to fill it when is discharged by effect of pressure differential. 
         [0065]    The rod  25  of the piston  23  comprises fixedly at its upper end a cross shaped thrust cam  29 , which in its upstroke abuts and pushes a third cam  30  slidably mounted in the longitudinal direction, but non-rotatably on said first axis  4  fixed to said lid  8  and pushes simultaneously or separately a fourth cam  31  fixed when moving in a third hollow axis  32  mounted on said first independent rotatably axis  4 ; said third hollow axis  32  being fixed to said seat  9 , so allowing fold-down the lid and seat simultaneously, or separately by effect of secure elements. 
         [0066]    Said hydraulic piston  23  is fixed to the bottom rear part of the toilet  18  through a fixing hollow element  20   b  which penetrates into a second orifice (not shown) provided in said toilet  18  and which also holds said base of the support structure  1  to fixed it at the same time above the toilet in the back part of the hole thereof; through said fixing hollow element  20   b  the piston rod makes its stroke and penetrates through a second orifice  33  ( FIG. 1 ) formed in the base  2  of the support structure  1  for driving the shafts cams to lower the lid and seat as described. 
         [0067]    When the toilet  18  is actuated to discharge water from the tank  19  and to dislodge debris from the toilet, a pressure differential is generated that allows the flow of pressurized water to the fold-down piston  23  from the supply source to fill the tank and simultaneously actuates the piston rod  25  to push the third cam  30  and the fourth cam  31  simultaneously or separately and lower the lid and seat. 
         [0068]    When the lid  8  and lower seat  9  are lowered, the pedals  15  and  16  return to their rest position to be actuated. 
         [0069]    In  FIGS. 1 ,  2 ,  11  and  13 , it is observed that said cover  6  of the support structure  1  comprises secure elements to prevent fold-down or lower the lid and locking elements which locks the piston element to prevent fold-down or lower the lid and seat; said secure element consisting of a horizontal travel button  34  mounted in a horizontal groove of the cover  6  and being connected to a guide rail element  35  embracing a protrusion of said third cam  30 , which being slidably embraced by said first elongate axis  4  which is attached to the lid  8 , can moves horizontally to remove said third cam  30  and to avoid contact with the cross shaped thrust cam attached to the rod  25 ; in this way is disabled the axis  4  of the lid  8  and prevents the lid is lowered when the water tank is discharged, pushing only the fourth cam  31  fixed to said third hollow axis  32  mounted in said first independent rotatably axis  4  and fixed at one of its ends to said seat  9  in order to fold-dawn or lower the seat only. 
         [0070]    Said locking element comprises a button  36  slidably mounted in a horizontal groove of the cover  6  of the support structure  1  and which comprises fixedly a locking cam  37 ; so that when said button  36  slides horizontally said locking cam  37  disposed on the cross shaped thrust cam  29  fixed to the rod  25 , obstructing the upstroke of the rod of the piston  23  and avoids that when discharging the water tank  19  of the toilet  18 , the lid  8  and seat  9  lower automatically. 
         [0071]    The invention has been sufficiently described so that a person of ordinary skill in the art to reproduce and obtain the results mentioned in the present invention. However, any person skilled in the technical field to which pertains the present invention may be able to make modifications not described in this application, however, whether to implement these changes in a particular structure or in the manufacturing process of the same, requires the claimed matter in the following claims, such structures will be comprised within the scope of the invention.