FR2997283A1 - Machine for e.g. washing domestic dishes in home, has transmission element moved in rotation by actuator to make insertion element to perform longitudinal movement during displacement of door from closed position to half-opened position - Google Patents

Abstract

The machine (1) has a door opening device (7) comprising an actuator (8) for moving a door (3) from a closed position to a half-opened position. The opening device comprises a transmission element (9) and a latch (10). The transmission element is linearly moved in a direction of an insertion element (5) by the actuator to unlock the insertion element relative to the latch. The transmission element is moved in rotation by the actuator to make the insertion element to perform a longitudinal movement during displacement of the door from the closed position to the half-opened position. The actuator is designed as a wax actuator.

Description

The present invention relates to a washing and drying machine comprising a door opening device. In general, the invention relates to washing and drying machines, particularly domestic dishwashing and drying machines, comprising a door opening device for automatically opening the door of the bowl. washing during a drying phase of the dishes of an operating cycle implemented by the machine so as to evacuate part of the steam contained in the washing tank to the outside of the machine and to dry more quickly the pieces of crockery contained inside the wash tub. The partial opening of the door of the washing tub makes it possible to reduce the amount of heat to be supplied for drying the dishes, and consequently the consumption of electrical energy. The partial opening of the door of the washing tub during the drying phase of the dishes also makes it possible to prevent the steam contained in the washing tub from condensing and forms water droplets on the parts of the washing tub. dishes contained in the wash tub. EP 0 687 439 A1 is already known which describes a washing and drying machine comprising a washing tub, a door, the door for closing an access opening formed on the front face of the washing tub. , a door lock device, the door lock device for locking the door in the closed position, wherein the door lock device comprises an engagement member, the engagement member being connected to the wash tub and cooperating with a locking member connected to the door, a door opening device, the door opening device for moving the door from a closed position to a half-open position of the door so as to provide a space between the washing tub and the door. Further, the door opening device comprises an electric motor and a plurality of gears, wherein the gears move the locking member engaging member in a longitudinal motion when moving the door from a closed position to an open position. The door opening device automatically opens the door of the wash tub by pushing the door by means of the engagement member of the locking device moved by the electric motor and the plurality of gears.

The door locking device is an integral part of the door opening device so as to hold the door of the washing tub in the closed position during a cycle of operation implemented by the machine, and to be able to open -2- automatically it during a drying phase of the dishes of the operating cycle. However, this washing and drying machine has the disadvantage of moving the engagement member of the locking device, by means of the electric motor and the plurality of gears, in a first direction of movement so as to pushing on the door to open the door, and in a second direction of displacement opposite to the first direction of movement so as to return to the initial position the engagement element of the locking device following the lapse of a predetermined duration .

Therefore, in the case where the user pushes the door of the washing tub from the open position to the closed position without fully opening the door before closing thereof, and that the engagement element of the device of lock is not returned immediately to the initial position after unlocking the locking device engaging element with respect to the locking element connected to the door, the door opening device comprising the electric motor and the plurality of gears can be damaged by the force exerted on it. In addition, such a door opening device comprising an electric motor and a plurality of gears is expensive. Furthermore, such a door opening device requires to be supplied with electrical energy when the latter is reset, since the electric motor is activated by the control unit of the machine so as to bring the element back into position. commitment in initial position. Therefore, in the case where the door device is down due to the movement of the door in the open position, the washing machine and the dish washer can no longer implement a cycle of operation without using the opening device since the door can no longer be returned to the closed position because of the electric motor and the plurality of gears forming the door opening device. The present invention aims to solve the aforementioned drawbacks and to provide a washing machine and drying dishes to partially and automatically open a door of a washing tank by means of a single door opening device and inexpensive while ensuring the safety of the machine by means of a door lock device. For this purpose, the present invention is directed to a washing and drying machine comprising: - a washing tank, - a door, said door for closing an access opening -3- formed in a face of said tank washing apparatus, a door locking device, said door locking device for locking said door in the closed position, wherein said door locking device comprises an engagement member, said engagement member being connected to said door lock chamber; washing and cooperating with a locking element connected to said door, - a door opening device, said door opening device comprising an actuator for moving said door from a closed position to a position ajar of said door so providing a space between said wash tub and said door. According to the invention, said door opening device comprises: - a transmission element, and - a first latch, where, at first, said transmission element is linearly displaced towards said engagement element by means of said actuator so as to unlock said engagement member with respect to said first latch, and in a second step, said transmission member is rotated by said actuator so as to drive said engagement member in a longitudinal motion when moving said door from a closed position to an open position. Thus, the door locking device is an integral part of the door opening device so as to hold the door of the washing tub in the closed position during a cycle of operation implemented by the washing machine and drying the dishes by means of the engagement element connected to the washing tub cooperating with the locking element connected to the door, and being able to open the latter automatically during a drying phase of the washing of the operating cycle by means of the engagement element connected to the washing tub and pushing on the door. In this way, such a simple and inexpensive door opening device makes it possible to open the door of the washing tub automatically. In addition, the door opening device can be operated without risk of damaging it when closing the door of the washing tub by the user from an open position of the door since a game is provided between the engagement member of the door latch and the transmission member of the door opening device when the actuator is not actuated, or otherwise kept in the rest position, so as to limit the stresses between the engagement element -4- and the transmission element. The clearance between the engagement member of the door latch and the transmission member of the door opening device secures the engagement member in the locked position by means of the first latch while the actuator is not activated. Unlocking of the engagement member with respect to the first latch of the door opening device is carried out as a result of the linear displacement of the transmission member towards the engagement member by means of the actuator so that to be able to rotate the transmission element by means of the actuator, then the engagement member in a longitudinal movement moving the door from a closed position to an open position. Furthermore, the door opening device allows to automatically open the door of the washing tub during a drying phase of the dishes of an operating cycle implemented by the machine so as to evacuate a part of the steam contained in the washing tank to the outside of the machine and to dry more quickly the dishes contained inside the washing tub. And the door of the washing tub can be left ajar for a prolonged period, this period being able to extend until the unloading of the clean dishes, and in particular until a subsequent operating cycle implemented by the machine, preferably until the dirty dishes are loaded for the next operating cycle, so as to aerate the wash tub and to prevent the occurrence of unpleasant odors therein. Preferably, said engagement element connected to said wash tub is held inside said locking element connected to said door during the movement of said door from a closed position to a half open position relative to said wash tub, and in the open position of said door. Thus, following the movement of the door from a closed position to an open position, the door of the washing tub is kept locked by means of the door locking device since the engagement element connected to the washing tub is maintained inside the locking element connected to the door. In this way, the washing tank door is kept locked by means of the door locking device and the door opening device so as to avoid a fall of the wash tank door in the case where the device The balance of the latter is out of adjustment or damaged, and to prevent children from accessing the interior of the washing tub by opening the door and possibly being injured with objects contained in the washing tub. According to a preferred feature of the invention, said door opening device comprises a second latch, wherein said second latch locks said engagement member following activation of said actuator driving said engagement member by means of said latch transmission element when moving said door from a closed position to an open position.

Thus, the second latch of the door opening device makes it possible to lock the engagement element in the extended position so as to keep the door of the washing tank in the open position. In this way, the locking of the engagement element in the extended position by the second latch of the door opening device makes it possible to deactivate the actuator, and in particular to allow the initial return of this one. Moreover, such a door opening device makes it possible to minimize the consumption of electrical energy since maintaining the open position of the wash tank door does not require keeping an actuator activated. Advantageously, said door opening device comprises a shuttle moved under said second latch by said engagement member during movement of said door in the open position, said engagement member being driven by said locking member of said door. According to another preferred feature of the invention, said door opening device comprises a spring driving said engagement element in the initial position following the separation of said locking element of said door with respect to said engagement element during the displacement. said door from an open position to an open position. Thus, following the disengagement of the locking element from the door relative to the engagement element during the displacement of the door in the open position, the engagement element is released and returns to its initial position by means of the spring. In addition, during this return to the initial position of the engagement element, the shuttle moves under the force of the second latch so as to fill a locking notch of the engagement element and thus to prevent the second latch to block the engagement element when moving.

Moreover, such a door opening device makes it possible to minimize the consumption of electrical energy since the resetting thereof is done by opening the door by the user from an open position to an open position. Other features and advantages will become apparent in the description below.

In the accompanying drawings, given by way of nonlimiting examples: FIG. 1 is a diagrammatic perspective view illustrating a washing and drying machine according to the invention, in which the door closes the opening of access of the wash tub is in the open position, and where a cut-off area is made in the door so as to illustrate the door lock device; FIG. 2 is a partial diagrammatic view from above of a washing and drying machine comprising a door locking device and a door opening device according to one embodiment of the invention, where the door of the wash tub is in closed position; - Figure 3 is a sectional view of Figure 2 according to the cutting plane XX; Figure 4 is a detail view of Figure 2; FIG. 5 is a partial schematic view from above showing a washing and drying machine comprising a door locking device and a door opening device according to one embodiment of the invention, where the door of the wash tub is in the open and locked position; Figure 6 is a sectional view of Figure 5 along the section plane YY; FIG. 7 is a partial schematic top view illustrating a washing and drying machine comprising a door locking device and a door opening device according to one embodiment of the invention, where the door of the wash tub is in the open position and the engagement member abuts; - Figure 8 is a sectional view of Figure 7 according to the ZZ cutting plane; FIG. 9 is a partial diagrammatic view from above of a washing and drying machine comprising a door locking device and a door opening device according to one embodiment of the invention, in which the door of the wash tub is in the open position and the engaging member is unlocked for a return to the initial position; and - Figure 10 is a sectional view of Figure 9 along the section plane TT.

We will first describe, with reference to Figure 1, a washing machine and drying dishes according to the invention. Of course, the present invention applies to all types of washing machine and to dry dishes, and in particular intended to be embedded in a piece of furniture or to be free standing.

A washing and drying machine 1 comprises a washing tub 2. The washing and drying machine 1 comprises a hydraulic circuit. The hydraulic circuit may comprise a connection device to the water distribution network and at least one solenoid valve controlled by a control unit of the washing machine and to dry the dishes 1 so as to supply water to the water tank. washing 2. The washing tub 2 has an access opening closed by a door 3. The access opening is formed in a face of the washing tub 2, in particular a front face of the washing tub 2. The door 3 of the washing tub 2 can thus be movable between a closed position in which it closes the access opening, in a sealed manner, an open position and an open position. Here, the door 3 is formed of two parts. In one embodiment, the first part of the door 3 corresponds to the external face visible to the customer. The outer face generally comprises a control panel allowing the user to program a cycle of operation of the washing machine and to dry the dishes 1. In another embodiment, the first part of the door 3 may also be a panel adapted to receive a facade of furniture of the kitchen. The second part of the door 3 is the counter door, that is to say the inner wall of the door 3 closing the access opening of the washing tub 2. In one embodiment, the tank of washing 2 may comprise a body 15 formed by at least side walls. The body 15 of the machine 20 for washing and drying the dishes 1 may also include an upper wall for washing machines and free-drying dishes. The door 3 of the washing tub 2 is pivotally mounted about an axis of rotation, in particular a horizontal axis of rotation (not shown). Here, the axis of rotation permitting rotation of the door 3 relative to the washing tub 2 is arranged at the bottom of the washing machine and drying the dishes 1. The washing tub 2 comprises an upper wall 2a. , side walls 2b, a bottom wall and a bottom wall. The washing tank 2 is particularly suitable for containing the water of the washing bath and / or rinsing steps of a cleaning program of dishes. The dishwashing and washing machine 1 comprises at least one dish rack 16 capable of holding dishes and disposed inside the washing tub 2. In one embodiment, as illustrated in FIG. 1, the washing and drying machine 1 comprises two dish baskets 16 arranged one above the other inside the washing tub 2, and respectively called upper dish rack for the dish rack 16 located in the upper part of the washing tub 2 and the lower dish rack for the dish rack 16 located in the lower part of the washing tub 2. The dish baskets 16 can be pushed and removed by sliding them inside the washing tub 2 of the washing machine and drying the dishes 1 either after the end of a cleaning program for unloading the dishes or before the start of a washing program. cleaning for loading the dishes. The washing and drying machine 1 comprises at least one heating means for heating the water of a washing and / or rinsing bath. Here and in no way limiting, said at least one heating means is a heating tunnel comprising a water circulation tube surrounded by a heating element (not shown). The washing and drying machine 1 comprises at least one means 17 for spraying the water of a washing and / or rinsing bath in the washing tub 2. Of course, the position and the number of Spraying means are in no way limiting and may be different.

The washing and drying machine 1 comprises at least one circulating pump (not shown) of the water of a washing bath and / or rinsing to said at least one spraying means 17. The washing and drying machine 1 may also include a drain pump (not shown) for draining water from a wash and / or rinse bath from the wash tub 2 to a waste water system. A washing and drying machine comprising a door latch and a door opening device according to an embodiment of the invention will now be described with reference to Figs. 2 to 10. The washing and drying machine 1 comprises a door locking device 4. The door locking device 4 makes it possible to lock the door 3 in the closed position. The door locking device 4 comprises an engagement element 5. The engagement element 5 is connected to the washing tub 2 and cooperates with a locking element 6 connected to the door 3.

Here and in no way limiting, the engagement element 5 of the door locking device 4 is formed by an arm of substantially flat shape. And the locking element 6 of the door locking device 4 is made by a member rotating about an axis of rotation integral with the door 3. The engagement element 5 of the door locking device 4 is used as a keeper and the locking element 6 of the door locking device 4 is used as a bolt. The engagement member 5 includes an opening at one end so as to cooperate with a slot of the locking member 6 so as to lock the door 3 with respect to the wash tub 2. When unlocking the the door 3 relative to the washing tub 2, the locking element 6 connected to the door 3 is held in the unlocked position by means of a spring 23. The washing and drying machine 1 comprises a washing device. door opening 7. The door opening device 7 comprises an actuator 8, in particular a linear actuator, for moving the door 3 from a closed position to an open position of the door 3 so as to provide a space between the washing tank 2 and the door 3. The door opening device 7 also comprises a transmission element 9 and a first latch 10. In a rest position of the door opening device 7, in particular when the door 3 of the washing tank 2 is in the closed position or in the open position, the engagement element 5 of the door locking device 4 is locked by the first latch 10. In a first step, the transmission element 9 is moved linearly by direction of the engagement member 5 by means of the actuator 8 so as to unlock the engagement member 5 with respect to the first latch 10, as illustrated in FIGS. 2 and 3. 3. The linear displacement of the transmission element 9 in the direction of the engagement element 5 by means of the actuator 8 corresponds to a translation movement. And in a second step, the transmission element 9 is rotated by means of the actuator 8 so as to drive the engagement element 5 in a longitudinal movement when the door 3 is moved from a closed position at an open position, as illustrated in FIGS. 2 and 3. The actuator 8 of the door opening device 7 makes it possible to move the engagement element 5 during the movement of the door 3 from a closed position at an open position. Thus, the door locking device 4 is an integral part of the door opening device 7 so that the door 3 of the washing tub 2 can be kept in the closed position during an operating cycle implemented by the washing and drying machine 1 by means of the engagement element 5 connected to the washing tub 2 cooperating with the locking element 6 connected to the door 3, and to be able to open the latter automatically. during a phase of drying the dishes of the operating cycle by means of the engagement element 5 connected to the washing tub 2 and pushing on the door 3. In this way, such a device of The simple and inexpensive door opening 7 makes it possible to open the door 3 of the washing tub 2 automatically. Here, the door opening device 7 comprises a housing 13, inside which the element transmission 9 and the actuator 8.

In the embodiment illustrated in FIGS. 1 to 10, the housing 13 of the door opening device 7 is mounted on the upper wall 2a of the washing tub 2. The housing 13 of the door opening device 7 comprises a body can be closed with a lid. The housing cover 13 is not shown in FIGS. 1 to 10 so as to facilitate the reading thereof and the understanding of the mechanism of the door opening device 7. The fixing of the cover on the body of the housing 13 can be implemented by means of fixing means, such as for example resilient snap elements and / or fixing screws. Of course, the cover fixing means on the housing body of the door opening device are in no way limiting and may be different. Advantageously, the engagement element 5 of the door locking device 4 is movable relative to the washing tank 2 and is guided in translation by means of the door opening device 7. Here, the translation guide of the the engagement member 5 of the door locking device 4 is formed at least by ribs on a lower wall of the housing 13 of the door opening device 7. As a result of activation of the actuator 8, in particular by the control unit of the washing machine and drying dishes 1, the transmission element 9 is moved linearly, in a first step, in the direction of the engagement element 5 by means of the actuator 8 so as to unlock the engagement element 5 with respect to the first latch 10. And in a second step, the transmission element 9 is rotated by means of the actuator 8 and drives the engagement element 5 following a longitudinal movement, e in particular according to a predetermined stroke, so as to move the door 3 of the washing tub 2 from a closed position to a half open position relative to the washing tub 2. The movement of the door 3 of the washing tub 2 from a closed position to an open position relative to the washing tub 2 is implemented by the thrust exerted by the engagement member 5 of the door locking device 4 on the locking element 6 of the door 3 .

Following the control of the door opening device 7 by the control unit of the washing machine and drying dishes 1, the transmission element 9 cooperating with the engagement element 5 is moved by a predetermined stroke by means of the actuator 8 so as to move the door 3 from a closed position to an open position. In one embodiment, the actuator 8 is a wax cylinder. Here, the actuator 8 comprises a piston, where the piston of the actuator 8 cooperates with a member projecting from the transmission element 9. With reference to FIGS. 2 and 3, the actuator 8 is controlled by the unit controlling the washing machine and drying the dishes 1 so as to move the piston of the latter in the extended position. At first, the piston of the actuator 8 exits and pushes the transmission element 9 in a linear movement and a predetermined stroke towards the engagement element 5. The linear displacement of the transmission element 9 raises the first latch 10 so as to release the latter from a first notch 14 of the engagement element 5 and to unlock the engagement element 5 with respect to the first latch 10. The output of the first latch 10 by to the first notch 14 of the engagement member 5 is implemented by means of a cam 18 formed on the transmission element 9 and a finger 19 formed on the first latch 10 so as to unlock the engagement member 5 relative to the first latch 10. Furthermore, the engagement member 5 is held in position by the first latch 10 cooperating with the first catch 14 of the engagement member 5 so as to maintain the door 3 in the closed position, and as long as the 8 of the door opening device 7 is not activated by the control unit of the washing machine and to dry the dishes 1 so as to move the transmission element 9, and in particular to move linearly the bearing 11 of the transmission element 9 relative to the axis 12. In a second step, following the unlocking of the engagement element 5 relative to the first latch 10, the piston of the actuator 8 continues its course and pushing the transmission element 9 in a rotational movement. The rotational movement of the transmission element 9 causes the engagement element 5 to move longitudinally so as to displace the door 3 of the wash tub 2 from a closed position to a half-open position with respect to the vessel. washing 2.

In addition, the door opening device 7 can be actuated without risk of damaging it when closing the door 3 of the washing tub 2 by the user from an open position of the door 3 since a clearance is provided between the engagement member 5 of the door locking device 4 and the transmission member 9 of the door opening device 7 when the actuator 8 is not actuated, or otherwise maintained in the rest position, so as to limit the stresses between the engagement element 5 and the transmission element 9. The clearance between the engagement element 5 of the door locking device 4 and the transmission element 9 of the door-opening device 7 makes it possible to hold the engagement element 5 in the locked position by means of the first latch 10 as long as the actuator 8 is not activated. Unlocking of the engagement element 5 with respect to the first latch 10 of the door opening device 7 is carried out following the linear displacement of the transmission element 9 towards the engagement element 5 by means of the actuator 8 so as to be able to rotate the transmission element 9 by means of the actuator 8, then the engagement element 5 in a longitudinal movement moving the door 3 from a closed position to an open position.

Furthermore, the door opening device 7 allows the door 3 of the washing tub 2 to be opened automatically during a drying phase of the dishes of an operating cycle implemented by the machine 1. so as to evacuate a portion of the steam contained in the washing tub 2 to the outside of the machine 1 and to dry more quickly the dishes contained within the washing tub 2. And the door 3 of the washing tank 2 can be left ajar for a prolonged period, this period being able to extend until the unloading of the clean dishes, and in particular until a subsequent operating cycle implemented by the machine 1, preferably until for loading the dirty dishes for the next operating cycle, so as to ventilate the washing tub 2, to prevent the appearance of unpleasant odors in the latter, and to limit the duration of stressing of a seal door 29 cooper ant with the washing tank 2 and the door 3. Preferably, the engagement element 5 connected to the washing tub 2 is held inside the locking element 6 connected to the door 3 during the displacement of the door 3 from a closed position to a position ajar with respect to the washing tub 2, and in the open position of the door 3. Thus, following the movement of the door 3 from a closed position to an open position, the door 3 of the washing tub 2 is kept locked by means of the door locking device 4 since the engaging element 5 connected to the washing tub 2 is held inside the locking element 6 connected to the door 3. In this way, the door 3 of the washing tub 2 is kept locked by means of the door locking device 4 and the door opening device 7 so as to avoid a fall of the door 3 of the tank of washing 2 in case the dispositi counterbalancing it is maladjusted or damaged, and prevent children from accessing the interior of the washing tub 2 by opening the door 3 and possibly being injured with objects contained in the tank of 2. After unlocking the engagement member 5 relative to the first latch and moving the engagement member 5 in a longitudinal movement as the door 3 is moved from a closed position to an open position by means of the transmission element 9 and the actuator 8, the door 3 is in the open position relative to the washing tub 2 and kept locked by means of the door locking device 4. The bolt of the locking element of the door 3 is kept hooked with the keeper of the engagement element 5 of the door locking device 4 so as to lock the door 3 with respect to the washing tub 2. The device port opening e 7 makes it possible to open the door 3 of the washing tub 2 automatically so as to create a natural ventilation of the washing tub 2 towards the outside of the washing machine and to dry the dishes 1. Here, the element 9 is moved in a first direction by means of the actuator 8. The first direction of movement of the transmission element 9 corresponds to a first axis. The engagement element 5 of the door locking device 4 is moved in a second direction by means of the actuator 8 and the transmission element 9. The second direction of movement of the engagement element 5 corresponds at a second axis. In the embodiment as illustrated in FIGS. 2 to 10, the first direction of movement of the transmission element 9 is inclined with respect to the second direction of displacement of the engagement element 5, and in particular perpendicularly . In an embodiment as illustrated in FIGS. 2 to 10, the transmission element 9 comprises an elongated bearing 11 inside which is disposed an axis 12. The axis 12 is fixed relative to a Thus, the oblongly shaped bearing 11 of the transmission element 9 enables the transmission element 9 to be displaced linearly in the direction of the engagement element 5 by means of the transmission element 9. 8, and in particular with respect to the axis 12 of the housing 13, so as to unlock the engagement element 5 with respect to the first latch 10. Advantageously, the linear displacement of the transmission element 9 is implemented by the movement of the bearing 11 relative to the axis 12 in a linear direction predetermined by the oblong shape of the bearing 11 during activation of the actuator 8. In this way, the bearing 11 of oblong shape of the transmission element 9 is oriented in s the direction of the linear displacement of the transmission element 9 in the direction of the engagement element 5 by means of the actuator 8. Practically, the rotational displacement of the transmission element 9 is set by abutting the bearing 11 with respect to the axis 12 during activation of the actuator 8, as illustrated in FIG. 4. Thus, following the linear displacement of the transmission element 9 direction of the engagement element 5 by means of the actuator 8, one end of the oblongly shaped bearing 11 of the transmission element 9 is brought into contact with the axis 12 of the housing 13 so as to drive in rotation the transmission element 9 about the axis 12 by means of the actuator 8. In this way, the end of the oblongly shaped bearing 11 of the transmission element 9 serves as a partial bearing around the axis 12 of the housing 13. Following the contacting of one end of the bearing 11 of the transmission element 9 with the axis 12 of the housing 13, the transmission element 9 is locked in translation by the axis 12 of the housing 13 and can only rotate about the axis 12 of the housing 13 under the force exerted by the actuator 8, in particular the piston of the actuator 8.

In one embodiment as illustrated in FIGS. 2 to 10, the transmission element 9 comprises a toothing cooperating with a rack provided on the engagement element 5. Thus, following the unlocking of the engagement element 5 relative to the first latch 10, the actuator 8 drives the transmission element 9 in a rotational movement. And the rotational displacement of the transmission element 9 drives the engagement element 5 in a longitudinal movement by means of the toothing of the transmission element 9 cooperating with the rack provided on the engagement element 5 of the so as to move the door 3 of the washing tub 2 from a closed position to an open position relative to the washing tub 2.

Here, the transmission element 9 is a disk portion. And the transmission element 9 comprises the toothing formed on its peripheral contour in the form of a circular arc. Preferably, the linear displacement of the transmission element 9 is smaller than the height of the teeth of the toothing of the transmission element 9 cooperating with the rack of the engagement element 5. Thus, the limitation of the length of the transmission element first linear displacement of the transmission element 9 at a distance less than the height of the teeth of the toothing of the transmission element 9 cooperating with the rack of the engagement element 5 ensures a continuous meshing of the transmission element 9 with the engagement element, and in particular to avoid a tooth jump. Here, when the engagement element 5 of the door opening device 7 is in the retracted position, that is to say that the actuator 8 is kept inactive or that the transmission element 9 is in the course of linear displacement towards the engagement element 5 by means of the actuator 8, the transmission element 9 meshes with the engagement element 5 with a large clearance. In this way, the clearance provided between the engagement member 5 of the door locking device 4 and the transmission member 9 of the door opening device 7 may be important in these states since no effort is required. to be transmitted between the transmission element 9 and the engagement element 5. In these states of the door opening device 7, the clearance can be important since the transmission element 9 does not carry the element engagement 5 to move the door 3 from a closed position to an open position. In addition, the door opening device 7 can be used without risk of damaging it when closing the door 3 of the washing tub 2 by the user from an open position of the door 3 since a clearance is provided between the engagement member 5 of the door locking device 4 and the transmission member 9 of the door opening device 7 when the actuator 8 is not actuated, or otherwise maintained in the rest position, so as to limit the stresses between the engagement element 5 and the transmission element 9. However, following the linear displacement of the transmission element 9 in the direction of the engagement element 5 by means of the actuator 8, the transmission element 9 meshes with the engagement element 5 with a minimum clearance. In this way, the clearance between the engagement element 5 of the door locking device 4 and the transmission element 9 of the door opening device 7 is minimum since a force must be transmitted to drive the door. engagement member 5 in a longitudinal movement when moving the door 3 from a closed position to an open position. Here and in no way limiting, the ratio between the length of the first linear displacement of the transmission element 9 and the height of the teeth of the toothing of the transmission element 9 and the rack of the engagement element 5 is 0.5.

A ratio of 0.5 corresponds to a length of the first linear displacement of the transmission element 9 of 1 mm for a height of the teeth of the toothing of the transmission element 9 and the rack of the engagement element 5 of 2mm, which is equivalent to a module of the teeth of 1. In order to increase the robustness of the door opening device 7, the ratio between the length of the first linear displacement of the transmission element 9 and the height of the teeth the teeth of the transmission element 9 and of the rack of the engagement element 5 can be reduced, in particular by modifying the modulus of the teeth while maintaining the same length of the first linear displacement of the transmission element 9. Advantageously, the door opening device 7 comprises a second latch 20, where the second latch 20 locks the engagement element 5 following the activation of the actuator 8 driving the element of commitment 5 by means of the transmission element 9 during the movement of the door 3 from a closed position to an open position, as illustrated in FIGS. 5 and 6. Thus, the second latch 20 of the door opening device 7 allows to lock the engagement member 5 in the extended position so as to maintain the door 3 of the washing tub 2 in the open and locked position. In this way, the locking of the engagement element 5 in the extended position by the second latch 20 of the door opening device 7 makes it possible to deactivate the actuator 8, and in particular to allow the return to the initial position of this one.

Moreover, such a door opening device 7 minimizes the consumption of electrical energy since maintaining the half-open and locked position of the door 3 of the washing tub 2 does not require keeping an actuator 8 activated. on unlocking the engagement member 5 with respect to the first latch 10, moving the engagement member 5 in a longitudinal movement as the door 3 is moved from a closed position to an open position by means of the transmission element 9 and the actuator 8, and the locking of the engagement element 5 in the extended position by the second latch 20, the actuator 8 is deactivated, in particular so that the door 3 can be closed again later. of the washing tub 2.

Thus, a new cycle of operation of the washing machine and drying dishes 1 can be implemented following the positioning of the door 3 of the washing tub 2 in the open position and the deactivation of the actuator 8. In further, following the deactivation of the actuator 8, the piston of the actuator 8 is returned to the rest position, in particular during the cooling of the wax of the jack.

Following the deactivation of the actuator 8, the piston thereof is returned to the initial position so as to allow a next command of the latter by the control unit of the washing machine and to dry the dishes 1 during next cycle of operation. Advantageously, the actuator 8 is returned to the initial position following the locking of the engagement element 5 by the second latch 20. Thus, during the movement of the piston of the actuator 8 to its end of travel, the second latch 20 of the door opening device 7 locks the engagement member 5 in the extended position so as to hold the door 3 of the washing tub 2 in the open and locked position and to allow the actuator 8 to return to the rest position. In this way, the actuator 8 can be de-energized and the door 3 of the wash tank 2 held in the open position and locked by means of the second latch 20 of the door opening device 7. Referring to FIGS. 6, following the displacement of the piston of the actuator 8 to its end of stroke, the second latch 20 of the door opening device 7 is housed in a second notch 21 of the engagement element 5 so as to lock the engagement member 5 in the extended position and maintain the door 3 of the washing tub 2 in the open and locked position. The second latch 20 of the door opening device 7 is held in the second notch 21 of the engagement element 5 by means of a spring 22. Here, the first latch 10 and the second latch 20 are held in pressure. against the engagement member 5 by means of a common spring 22. Thus, the number of springs necessary to keep the first latch 10 and the second latch 20 pressed against the engagement element 5 is minimized, and makes it possible to reduce the costs of obtaining the door opening device 7. Here , the spring 22 now pressing the first latch 10 and the second latch 20 against the engagement element 5 is a helical type spring having one end connected to the first latch 10 and another end connected to the second latch 20 of the latching device. In addition, the spring 22 holding the first latch 10 and the second latch 20 against the engagement member 5 is a compression spring.

Of course, the type of elastic return member now pressurizing the first latch and the second latch against the engagement member is in no way limiting and may be different, in particular a leaf spring. In addition, the type of elastic return member now pressurizing the first latch and the second latch can be integrated into the latch.

In another embodiment, the first latch 10 and the second latch 20 are respectively held in pressure against the engagement element 5 by means of at least one elastic return element. Advantageously, the door opening device 7 comprises a shuttle 24 moved under the second latch 20 by the engagement element 5 during the displacement of the door 3 in the open position, the engagement element 5 being driven by the locking element 6 of the door 3. In the case where the door 3 of the washing tub 2 is in the open position, and preferably at the end of a cycle of operation of the washing machine and drying the dishes 1, the door 3 can be moved to the open position by the user. The displacement of the door 3 from the open position to the open position relative to the washing tub 2 can be achieved by pulling on a handle 26 of the door 3. The user thus exerts a force on the handle 26 of the door 3. With reference to FIGS. 7 and 8, when the door 3 is moved from the open position to the open position relative to the washing tub 2, in a first step, traction is exerted on the engagement element 5. The traction exerted on the engagement element 5 causes a displacement of the transmission element 9 by means of the rack of the engagement element 5 and the toothing of the transmission element 9 until The first abutment 27 is formed by a wall of the housing 13 of the door opening device 7 on which the transmission element 9 bears so as to block the first abutment 27. transmission element 9 in rotati we.

At the same time, the second latch 20 is forced to lift so as to leave the second notch 21 of the engagement element 5, then to pass over the shuttle 24. Then, a second stop 28 blocks the translation of the transmission element 9 so as to avoid disengagement from the rack of the engagement element 5 with respect to the toothing of the transmission element 9. Thus, this second stop 28 makes it possible to avoid losing the first stop 27 by the support of the transmission element 9 on the wall of the housing 13 of the door opening device 7. Here, the second stop 28 is formed by a stud formed in the housing 13 of the device door opening 7 on which the transmission element 9 bears. Following the abutment of the transmission element 9, the engagement element 5 is locked in translation. Here, the locking in translation of the engagement element 5 is implemented by the abutment of the transmission element 9, in particular made by the housing 13, and the contacting of the teeth of the rack of the engagement member 5 and teeth of the toothing of the transmission element 9. When the user continues to exert a force on the handle of the door 3, the locking element 6 of the door 3 switches around its axis of rotation so as to release the engagement element 5 of the door locking device 4, as illustrated in FIGS. 9 and 10. Thus, the door 3 of the washing tub 2 is unlocked with respect to the engagement element 5 of the door locking device 4. In this way, the movement of the door 3 from an open and locked position to an open position can be implemented without any further movement to the inside the door opening device 7. Preferably, the door opening device 7 comprises a spring 25 driving the engagement element 5 in the initial position following the separation of the locking element 6 of the door 3 relative to the element of engagement 5 when moving the door 3 from an open position to an open position. Thus, following the disengagement of the locking element 6 from the door 3 with respect to the engagement element 5 during the displacement of the door 3 in the open position, the engagement element 5 is released and returns to initial position by means of the spring 25. When moving the door 3 from an open position to an open position, the transmission element 9 and the engagement element 5 are moved together by the spring 25 so as to move the 5 in a longitudinal movement and to the initial position of the engagement element 5. Here, the spring 25 moving the engagement element 5 in the initial position is a pin-like spring having a end connected to the transmission element 9 and another end connected to the housing 13 of the door opening device 7. In addition, the spring 25 moving the engagement element 5 in the initial position is an angular action spring . Following the tilting of the locking element 6 of the door 3 around its axis of rotation, the opening of the engagement element 5 of the door locking device 4 is released from the slot of the locking element 6 of the door 3 so as to allow the return to the initial position, that is to say in the retracted position, of the engagement element 5 under the effect of the spring 25. The spring 25 being connected to the transmission element 9 makes it possible to move the engagement element 5 in the retracted position by means of the toothing of the transmission element 9 cooperating with the rack of the engagement element 5. In addition, during this return to initial position of the engagement element 5, the shuttle 24 moves under the force of the second latch 20 so as to fill the second notch 21 of the locking element 5 and thus prevent the second latch 20 to block the engagement element 5 during its displacement. At the beginning of the return to the initial position of the engagement element 5, the second latch 20 exerts a force under the action of the spring 22 on the shuttle 24 and tends to immobilize the shuttle 24. Thus, the shuttle 24 allows closing the second notch 21 of the engagement element 5 so as to prevent the second latch 20 from locking in the second notch 21 of the engagement element 5. Then, the engagement element 5 causes the shuttle 24 in its return stroke in its initial position under the effect of the spring 25 to the stop against an edge of the second notch 21 of the engagement element 5 so as to allow the second latch 20 to pass from a support on the shuttle 24 to the engagement element 5 without obstacle. Thus, the displacement of the shuttle 24 in the second notch 21 of the engagement element 5 under the effect of the spring 25 driving the engagement element 5 in the initial position allows to release the stroke of the element of engagement 5 and to prevent the locking of the second latch 20 in the second notch 21 of the engagement element 5.

Then, during the return to the initial position of the engagement element 5, the engagement element 5 lifts the first latch 10. And the first latch 10 is repositioned in the first notch 14 of the element. engagement 5 by means of the spring 22, waiting for a next command of the actuator 8 by the control unit of the machine 1.

The return of the engagement member 5 under the effect of the spring 25 to its retracted locked position by means of the first latch 10 constitutes the resetting of the movable engagement member 5 in the door opening device 7 for the next cycle of operation of the washing machine and drying the dishes 1. Thus, the engagement element 5 is blocked by the first latch 10 by means of the spring 22 so as to maintain in the retracted position the element 5 of the locking device 4 as the door 3 is in the closed position, and in particular as the actuator 8 of the door opening device 7 is not activated to move the door 3 from a closed position at an open position. In addition, the blocking of the engagement element 5 in the retracted position and locked by the first latch 10 keeps the transmission element 9 in the initial position so that it can be moved by the actuator 8 during a controlling the door opening device 7 to move the door 3 from a closed position to an open position. Moreover, such a door opening device 7 makes it possible to minimize the consumption of electrical energy since the resetting of the latter is carried out without activation of an electrically controlled actuator, but only by opening the door 3 by the user since an open position to an open position. Thus, the resetting of the door opening device 7 does not require an additional effort to be performed by the user, nor an additional supply of electrical energy. The resetting of the door opening device 7 is therefore implemented by the movement of the door 3 from an open position to an open position. In the case where a power failure occurs during a cycle of operation of the washing machine and drying dishes 1, the door opening device 7 can be rearmed by moving the door 3 from an open position to an open position so as to avoid forcing on the engagement member 5 to attempt to retract it into the door opening device 7, and possibly damaging the opening device 7. When the door 3 is in the open position, the door 3 can be moved to the closed position by the user by pushing on the door 3. When moving the door 3 from an open position to a closed position, the door 3 locking member 6 tilts about its axis of rotation so as to lock the engagement member 5. When moving the door 3 from an open position to a closed position, the engagement member 5 being in position ren locked and locked by the first latch 10 inside the door opening device 7 following the movement of the door 3 from an open position to an open position, the locking member 6 tilts about its axis of rotation. so as to lock on the engagement member 5 being fixed. Thus, following the resetting of the door opening device 7 during the displacement of the door 3 from an open position to an open position, the engagement element 5 can no longer move back and the force exerted by the user on the door 3 to close it causes the tilting of the locking element 6 around its axis of rotation so as to lock on the engagement element 5. When the door 3 is in the closed position, the door 3 can be moved to the open position by the user by pulling on the handle 26 of the door 3. When the door 3 is moved from a closed position to an open position, the locking element 6 switches around its axis of rotation so as to release the engagement member 5. Thus, the movement of the door 3 from a closed position to an open position is implemented without any movement within the door opening device 7.

In this case, the engagement member 5 and the transmission member 9 are held in position by the first latch 10 remaining locked in the first detent 14 of the engagement member 5 by means of the spring 22, so that to prevent longitudinal movement of the engagement member 5 from a retracted position to an extended position. Thus, the engagement element 5 is kept locked by the first latch 10 so as to make the engagement element 5 fixed with respect to the washing tub 2. In the case where the actuator 8 of the device door opening 7 is out of order, the washing and drying machine 1 can still operate a cycle -22- operation without using the door opening device 7 since the engagement element 5 and the transmission element 9 are held in position by the first latch 10 remaining locked in the first notch 14 of the engagement member 5 by means of the spring 22, so as to prevent longitudinal movement of the element. engagement of a retracted position to an extended position, without the actuator 8 exerting a force on the transmission element 9. Thus, the engagement element 5 is kept locked by the first latch 10 so as to render the engagement element 5 fixed relative to the tank d e washing 2 while ensuring the locking function of the locking element 6 of the door 3 with the engagement element 5 of the door locking device 4. In this way, the door opening device 7 can to be inoperative while maintaining the functional door locking device 4 by locking the engagement member 5 in a fixed position by means of the first latch 10. In one embodiment, the door opening device 7 comprises a detection device 30 for detecting the positioning of the transmission element 9. Thus, the detection device 30 makes it possible to determine whether the engagement element 5 is in the unlocked position relative to the first latch 10 so as to avoid the start of a cycle in operation of the machine 1 with the door 3 ajar.

In one embodiment, the transmission element 9 comprises a projecting element 31 bearing on a detector 32 of the detection device 30 during the resetting of the door opening device 7. Here, the detection device 30 is a contactor. Of course, the type of detection device is in no way limiting and may be different, and for example a capacitive or magnetic detector. The washing and drying machine 1 comprises control means provided with a control unit (not shown), where the control unit comprises at least one electronic card. Said at least one electronic card comprises at least one microcontroller capable of implementing predetermined operating cycles of the washing machine and drying dishes 1. Thus, the control unit controls in particular the door opening device 7 , and in particular the actuator 8 by means of an electrical connection, so as to partially open the door 3 of the washing tub 2, preferably during a drying phase of the dishes, as described above.

Thanks to the present invention, the door opening device can automatically open the door of the washing tub during a drying phase of the dishes of an operating cycle implemented by the machine so evacuating part of the steam contained in the washing tub to the outside of the machine and drying more quickly the dishes contained within the washing tub. Of course, many modifications can be made to the embodiments described above without departing from the scope of the invention.

Claims (12)

CLAIMS 1- Washing and drying machine (1) comprising: a washing tub (2), a door (3), said door (3) for closing an access opening formed in a face of said bowl washing device (2), a door locking device (4), said door locking device (4) for locking said door (3) in the closed position, - wherein said door locking device (4) comprises a engagement member (5), said engagement member (5) being connected to said washing tub (2) and cooperating with a locking member (6) connected to said door (3), - an opening device door device (7), said door opening device (7) comprising an actuator (8) for moving said door (3) from a closed position to an open position of said door (3) so as to provide space between said wash tank (2) and said door (3), characterized in that said opening device e of door (7) comprises: - a transmission element (9), and a first latch (10), - where, at first, said transmission element (9) is moved linearly towards said engagement element (5) by means of said actuator (8) so as to unlock said engagement member (5) with respect to said first latch (10), and in a second step, said transmission member (9) is rotated by means of said actuator (8) so as to drive said engagement member (5) in longitudinal movement as said door (3) moves from a closed position to an open position. 2- washing and drying machine (1) according to claim 1, characterized in that said transmission element (9) comprises a bearing (11) of oblong shape inside which is disposed an axis (12) said axis (12) being stationary relative to a housing (13) of said door opening device (7). 3- washing and drying machine (1) according to claim 2, characterized in that the linear displacement of said transmission element (9) is implemented by the movement of said bearing (11) relative to said axis (12). ) in a linear direction predetermined by the oblong shape of said bearing (11) upon activation of said actuator (8). 4- A washing and drying machine (1) according to claim 2 or 3, characterized in that the rotational displacement of said transmission element (9) is implemented by the abutment of said bearing (11) by report to said axis (12) upon activation of said actuator (8). 5- washing machine and drying dishes (1) according to any one of claims 1 to 4, characterized in that said actuator (8) is a wax cylinder. 6. Machine for washing and drying dishes (1) according to any one of claims 1 to 5, characterized in that said transmission element (9) comprises a toothing cooperating with a rack provided on said engagement element ( 5). 7- washing and drying machine (1) according to claim 6, characterized in that the linear displacement of said transmission element (9) is less than the height of the teeth of the toothing of said transmitting element (9) cooperating with the rack of said engagement member (5). 8- A washing and drying machine (1) according to any one of claims 1 to 7, characterized in that said door opening device (7) comprises a second latch (20), wherein said second latch (20) locks said engagement member (5) upon activation of said actuator (8) driving said engagement member (5) by said transmission member (9) as said gate (3) is moved from said a closed position to an open position. 9. A washing and drying machine (1) according to claim 8, characterized in that said first latch (10) and said second latch (20) are held in pressure against said engagement element (5) by means of a spring (22) common. 10- A washing and drying machine (1) according to claim 8 or 9, characterized in that said actuator (8) is returned to the initial position following the locking of said engagement element (5) by said second latch ( 20). 11- A washing and drying machine (1) according to any one of claims 8 to 10, characterized in that said door opening device (7) comprises a shuttle (24) moved under said second latch ( 20) by said engagement member (5) when moving said door (3) to the open position, said engagement member (5) being driven by said locking member (6) of said door (3). 12- Machine for washing and drying dishes (1) according to any one of claims 1 to 11, characterized in that said door opening device (7) comprises a spring (25) driving said engagement element (5) in the initial position-26- after detaching said locking element (6) from said door (3) with respect to said engagement element (5) during the displacement of said door (3) from a half-open position in an open position.