Abstract:
A reception interface for a machine for preparing beverages by infusion from a ground product to be infused, wherein the interface removably receives by manual action of a user a filter-holder device for containing the ground product, wherein it comprises a selection element that is movable from a rest position and configured to be reach one of a plurality of work positions each corresponding to a respective operation mode of the machine, wherein the selection element can moved into one or the other of the work positions by the filter-holder device when received in the reception interface. One or more embodiments of the invention also relate to a machine for preparing beverages as well as a method for operating such a machine.

Description:
FIELD 
       [0001]    This invention relates to a machine that can be used during the preparation of beverages for preparing beverages with a ground product base to be infused, with this system advantageously constituted by a grinder for preparing the ground and by a machine for preparing beverages of the product to be infused, with the product advantageously but not only being coffee. The term infusion is to be taken in the broad sense, with the infusion able to be carried out, for example, by passing hot water in a filter filled with ground product and then being referred to as leaching or forced leaching. 
         [0002]    In this field, and particularly for preparing so-called espresso coffees, a unit for the support of a dose of ground coffee, constituting a filter-holder device is commonly used. The filter-holder device comprises a grasping portion for the hand of a user in the form of a handle and a portion for receiving with a ground coffee filter within a filter-holder cup. 
         [0003]    In the lower portion of the device, downstream of the filtering bottom of the cup, an outlet comprising one or several channels is constituted for the removal of the beverage made. This type of filter-holder device cooperates either with the reception interface of a coffee grinder for the loading with ground coffee of the device, or with the interface of a machine for preparing beverages for the injection of hot water through the ground and the making of the beverage. The filter-holder cup is configured to receive a predetermined quantity of ground coffee. 
         [0004]    Generally, one, two or more coffee beverages can be produced simultaneously. The user, in particular a café owner, chooses the filter-holder device that comprises the cup suited for the number of beverages that he wants to make. 
         [0005]    According to prior art shown in publication EP-A1-280 594, a system for detecting doses for a filter-holder device comprising a cup is provided. The technique implemented according to this prior art consists in using magnetic Hall effect sensors that make it possible, according to a predetermined s encoding and according to a movement of placing into rotation of the filter-holder device, to identify a few different types of filter-holder devices. 
         [0006]    Although providing general satisfaction, the device in question has certain limitations. Firstly, the number of types of filter-holder devices that can be detected is limited by the very construction of the sensor. This device cannot therefore be extended to detections in greater numbers in particular linked in addition to the volume of the ground coffee or to parameters for preparing the beverage which can vary according to the quality of the type of coffee. 
         [0007]    On the other hand, if the characteristic relating to the number of beverages made in correspondence with a given filter-holder and therefore for example for is a specific quantity of ground to be produced by the grinder for the given filter-holder is the most frequent, this characteristic can be combined with or be replaced with one or other characteristics, with this other or these other characteristics able for example to relate to the finesse of the ground and/or one or several parameters concerning temperature and pressure of the machine for preparing beverages. 
         [0008]    In such a case, there should be as many filter-holder devices with a different configuration as there are possibilities of combining different characteristics relative to the beverage or to the preparation of the beverage. This would therefore require a certain number of different filter-holder devices and would render such a detection of such characteristics difficult and even impossible to implement and especially unviable economically. 
         [0009]    In addition, with this detection according to prior art, the user has no means of interfering in the selection as the latter is carried out entirely automatically therefore not requiring his participation. 
         [0010]    The document FR-A-1.156.557 provides, in a machine for producing beverages of the coffee type, a device for actuating the starting of the producing of the beverage which is controlled by the setting in place of the infusion-holder cup. The system acts as a switch between two positions and therefore does not resolve the problem of the technique encountered hereinabove. 
         [0011]    A problem at the base of this invention is to obtain during the setting into s place of a filter-holder device on a machine for preparing beverages with a base of a product to be infused a selection of one of the characteristics of the product to be infused or of its method of preparation without this requiring a different filter-holder for each one of the possible characteristics, as these characteristics are plural. 
       SUMMARY 
       [0012]    To this effect, according to the invention a reception interface for a machine for preparing beverages by infusion from a ground product to be is infused is provided, the interface removably receives by manual action of a user a filter-holder device for containing the ground product, characterised in that it comprises a selection element that is movable from a rest position and configured to reach so that it reaches one among several work positions each corresponding to a respective operation mode of the machine, the selection element able to be displaced to one or the other of the work positions by the filter-holder device when received in the reception interface. 
         [0013]    The technical effect is the selecting of a mode of operation the machine combined with the action of the user manually placing the filter-holder device. As such, the use of a filter-holder device specific to a respective mode of operation is avoided. This makes it possible to simplify the management of filter-holder devices as well as generating savings on the manufacture of these various devices. The gesture to be carried out by the user is simple, the selection element arranged on the reception interface being easily accessible to the filter-holder device guided by the hand of the user being directed towards this interface for its positioning on the interface. 
         [0014]    It must be noted that the invention has the advantage of allowing the user, easily, a selection from among several positions of the selection element which means that at least three positions can be reached (a rest position, and at least two work positions with each corresponding to a mode of operation the machine). 
         [0015]    Moreover, the machine can comprise a button or other means of triggering s in order to initiate the production of a beverage after setting into place of the filter-holder device selecting a work position. In another case, (the starting is automatically initiated once the selection of the work position is carried out. 
         [0016]    Optionally, the invention further comprises at least one of any of the following characteristics:
       the displacement of the selection element is a pivoting of the element with respect to one of its ends;   the selection element is in the form of a lever of which the head is pivotably mounted around a pivot attached to the interface;   said at least two work positions are obtained by pivoting in opposite is directions of the selection element around the rest position;   the selection element comprises a mechanical means of return to the rest position;   the means of return comprise a spring;   the means of return comprise an elastically deformable loop, with the loop passing through an anchoring point on the reception interface and at least one anchoring point on the selection element, the displacement of the selection element stretching said elastically deformable loop which returns to its unstretched form when no solicitation is applied to it;   the means of return comprises a magnetic member;   the invention comprises for each work position at least one means for detecting the passage of the election element into the work position;   the means for detecting is a microswitch;   the means for detecting is an electronic sensor in particular, of the Hall effect, inductive, capacitive, RFID or radio-identification, reed also called flexible blades, photoelectric, type, the sensor being carried by one among the selection element or the reception interface, with an additional element to the sensor being carried by the other among the interface or the element.       
 
         [0027]    According to another object of the invention, a machine is provided for preparing beverages par infusion, characterised in that it comprises such a reception interface, with the interface being removable or not from the rest of the machine. 
         [0028]    Advantageously, when at least one means of detection is provided for each work position, said at least one means for detecting being connected to a central unit of the machine, the central unit activating the mode of operation that corresponds to the work position reached by the selection element. 
         [0029]    The machine on core body, can include a system for positioning a filter-holder device. 
         [0030]    Advantageously, means for displaying a visual signal that indicate which mode of operation has been selected are provided. 
         [0031]    In an embodiment of the invention, the machine is a coffee grinder comprising a hopper supported by a core body, with the reception interface arranged on the core body. 
         [0032]    Advantageously, the reception interface and the selection element in rest position extend vertically on said machine or with an inclination downward of the machine in the longitudinal median plane of the machine by forming an acute angle in relation to the vertical. 
         [0033]    In the framework of the invention, a method of operating such a machine for preparing beverages by infusion is provided, with the method comprising the following steps:
       selecting a mode of operation the machine by action of the filter-holder device on the selection element and displacement of the latter in one of the work positions corresponding to said mode of operation,   operating of the machine automatically with the selected mode of operation.       
 
         [0036]    Advantageously, the methods of operating relate to the quantity of ground to be placed in the filter-holder device, the finesse or the quality of the ground or one or several operating parameters of the machine such as the temperature and/or the pressure of the water used for the infusion. 
         [0037]    Advantageously, the method of operation selected can operate only after the detection of the reception of the filter-holder device in the reception interface. 
         [0038]    Advantageously, a safety timer is set up between the selecting by the selection element of an operating mode and the starting of the machine with the selected mode of operation. The invention also relates to a system provided with a filter-holder device and with the interface or the machine. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0039]    Other characteristics, purposes and advantages of this invention shall appear when reading the following detailed description and when examining the annexed drawings provided as non-limiting examples and wherein: 
           [0040]      FIGS. 1 to 3  diagrammatically show a front view of a machine for preparing beverages according to this invention provided with a filter-holder device for  FIGS. 1 and 3  and without a filter-holder for  FIG. 2 , with the machine comprising a mobile selection element being respectively in a first work position, a rest position and a second work position in these figures, 
           [0041]      FIG. 4  diagrammatically shows a side view of the machine shown in  FIG. 3 , 
           [0042]      FIGS. 5 to 7  diagrammatically show an enlarged view of the mobile selection element in the position of the element shown respectively in  FIGS. 1 to 3 , with  FIG. 6  being furthermore enlarged in relation to  FIGS. 5 and 7 , with these figures showing a means of return to rest position of the selection element, 
           [0043]      FIGS. 8, 9  diagrammatically show an enlarged view of the mobile selection element according to this invention in another embodiment of its means of return than that shown in  FIGS. 5 to 7 , 
           [0044]      FIGS. 10 to 11  diagrammatically show an enlarged view of the mobile selection element according to this invention in an embodiment comprising microswitches as detectors of the position of the selection element, with figure  10  showing the rest position of the selection element while  FIG. 11  shows one of the two work positions, 
           [0045]      FIG. 12  diagrammatically shows an enlarged view of the mobile selection element according to this invention in an embodiment comprising Hall effect sensors as detectors of the position of the selection element, with the selection element being in its rest position in this figure. 
       
    
    
     DETAILED DESCRIPTION 
       [0046]    In reference to  FIGS. 1 to 4 , a machine for preparing beverages is described shown in a non-limiting manner by a grinder  10 , to grind a product to be infused, advantageously in the form of coffee beans. The grinder  10  conventionally comprises a core body  12  and a hopper  11  for receiving and storing coffee beans. 
         [0047]    This grinder  10  makes it possible to produce a ground coffee delivered to a mouth forming a reception interface  13  for the cup  2  of a filter-holder device  1  positioned at this location, with this reception interface  13  being shown inclined downwards in  FIG. 4 , which is not limiting. 
         [0048]    The filter-holder device  1  conventionally comprises a handle la as well as a cup  2  presenting a filtering bottom and able to receive in its inner volume a predetermined dose of ground coffee. In the lower portion, at the outlet of the liquid, the device  1  is provided with a beverage outlet  5  that can comprise one or several channels. There can be as many filter-holder devices  1  or alternatively as many cups with different volumes as there are quantities of ground desired. 
         [0049]    For the reception of the filter-holder device  1  on the reception interface  13 , more preferably at the lower portion of this interface  13 , is formed here a system with two means (or members) for positioning the filter-holder device  1  such as two support members  14  here figured in the form of two parallel rods protruding towards the front of the grinder  10  showing the machine. 
         [0050]    As can be seen in  FIGS. 1, 3 and 4 , these two support members  14  are applied onto a lower portion of the filter-holder device  1  in order to support it. 
         [0051]    Advantageously, alternatively or in combination with these two reception members  14 , two assembly bayonets can be provided that can be arranged at the periphery of the filter-holder device  1  at its upper portion. These assembly bayonets advantageously protrude beyond the wall of the filter-holder device  1  in order to construct elements for cooperating with the reception interface  13  of the coffee grinder  10  showing a machine for preparing beverages. 
         [0052]    According to this invention, the machine for preparing beverages, in the figures shown by a coffee grinder  10 , comprises a mobile selection element  3 . This selection element  3  that is mobile is also shown enlarged in  FIGS. 5 to 7 . 
         [0053]    As can be seen in particular in  FIGS. 1 to 3 , this selection element  3  can be displaced in a first and in a second work position shown respectively in  FIGS. 1 and 3 , this starting from a rest position shown in  FIG. 2 . Work position means a selection position. 
         [0054]    These work positions correspond respectively to a respective characteristic of the ground coffee, such as the quantity of ground coffee or the finesse of the grind or to a characteristic of producing the coffee such as the temperature or the pressure of the water used to make the coffee. The quantity of ground coffee is preferred. 
         [0055]    The displacement in work position of the selection element  3  is carried out by the movement of the filter-holder device  1  towards the reception interface  13  and the grinder  10 . It is the user who displaces the filter-holder device  1  in such a way that the selection element  3  is pushed into one of the two work positions. 
         [0056]    In other embodiments of the selection element  3 , there can be more than two work positions, with these positions being reached during a displacement but not necessarily maintained. As such, this can be only the reaching of a specific displacement which signals a work position and not only the retaining of it. 
         [0057]    As can be seen in  FIGS. 5 to 7 , the displacement into work position of the selection element  3  can be done through pivoting. To do this, advantageously the selection element  3  has a head  3   a  and a lever  3   b.  The head  3   a,  advantageously substantially circular, is articulated at its centre around a pivot  6 . 
         [0058]    In the figures, the selection element  3 , in particular its lever  3   b,  extends in an inclined manner downwards. This is not limiting and the selection element  3  can also extend vertically by being pivotable around a horizontal pivot  6 . In this embodiment the selection element  3  follows the inclination of the reception interface  13  by extending into the longitudinal median plane of the machine  10  in the rest position and can be pivoted in a plane perpendicular to this longitudinal median plane in at least one selection position. 
         [0059]    If preferably, the reception interface  13  and the selection element  3  extend vertically on said machine  10  or with an inclination that has an acute angle in relation to the vertical by extending into the longitudinal median plane of the machine  10 , it is possible that the selection element  3  extends horizontally by being pivotable around a vertical pivot. 
         [0060]    A movement other than a pivoting for the passage into one of the at least two positions is also possible, with the essential being that it is the manual displacing of the filter-holder device  2  towards the grinder  10  under a specific action of the user that places the selection element  3  in one of the work positions. 
         [0061]    Advantageously, still as shown in  FIGS. 5 and 7 , the selection element  3  is maintained in first or second work position by the presence of the filter-holder device  1  then made integral with the grinder  10 . The filter-holder device  1  can carry at the upper portion of its periphery lugs  15  that act as abutment elements for the selection element  3 , with each one of the lugs  15  corresponding to a specific work position. 
         [0062]    The selection element  3  comprises a means of return into its rest position, a means which can have several configurations. A first group of means to return is formed by mechanical means of return while a second group of means of return is formed by magnetic means. 
         [0063]    In a first embodiment shown in  FIGS. 5 to 7 , this means of return is in the form of a return spring  7 , advantageously helical, of which one end is connected at an anchoring point  3   c  to the head  3   a  of the selection element  3  and the other end is fastened to an anchoring point  4  that is fixed in relation to the reception interface or to the core body of the machine. 
         [0064]    The spring  7  is as such subjected to a force of traction when the selection element  3  takes one of the at least two work positions and is therefore returned to the rest position as soon as nothing opposes this return movement. 
         [0065]    Another embodiment of a mechanical means of return of the selection element  3  into its rest position is shown in  FIGS. 8 and 9 . In this embodiment, the means of return is in the form of a deformable loop  7   a  with a first portion of the loop  7   a  partially surrounding the anchoring point  4  with the reception interface or the core body of the machine. A second portion of the loop  7   a  partially surrounds the pivot  6  of the selection element  3 , the pivot  6  and the anchoring point  4  acting as a return point of the loop  7   a.    
         [0066]    In this embodiment, the head  3   a  of the selection element  3  carries a nipple  9 , with the nipple  9  located between the pivot  6  and the anchoring point  4  in rest position of the selection element  3 , as shown in  FIG. 8 . During the pivoting movement of the selection element  3 , shown in  FIG. 9 , the nipple  9  is no longer aligned with the pivot  6  and the anchoring point  4 . 
         [0067]    The nipple  9  is then used as a third point of return of the deformable loop  7   a  with a third portion of the loop  7   a  partially surrounding the nipple  9 : the loop  7   a  is then stretched and naturally returns to its unstretched position when nothing opposes this return. 
         [0068]    As mentioned hereinabove other types of a means of return can be used. The means of return of the selection element  3  can be mechanical, such as a traction spring, deformable loop or a spring of the clothespin type. 
         [0069]    However, a magnetic means of return without contact is also possible. Finally, for a selection element  3  with an inclined or horizontal axis, a return to rest position of the selection element  3  via its own weight due to gravity can also be considered. 
         [0070]      FIGS. 10 and 11  show microswitches  8  as detectors of the position of the selection element  3  in one of its work positions. In the embodiment shown in these figures, there are two work positions that correspond to a pivoting respectively in the clockwise and anti-clockwise direction of the selection element  3  comprising a lever  3   a  and a head  3   c  pivoting around a pivot  6 . A microswitch  8  is provided for each work position. Each microswitch  8  is arranged on a respective side of the head  3   a  of the selection element  3 . 
         [0071]    Each microswitch  8  has a retractable tip  8   a  which provokes the detection of the position of the selection element  3  when pressed by the latter. For this, the head  3   a  of the selection element  3  has a protruding portion  16 , advantageously similar to a cam profile, with this portion  16  able to enter into contact with the tip  8   a  of the microswitch  8  and press it to retract it and provoke the detection signal of the work position. 
         [0072]    Alternatively to the protruding portion  16 , concave portions can be provided on the head  3   a  of the selection element  3  facing the microswitches  8  when the selection element  3  is in rest position, with a microswitch  8  encountering a non-concave portion on the head for the detecting of a work position. 
         [0073]    The protruding portion  16  is located in rest position of the selection element  3  between the two microswitches  8  in order to be able to interact symmetrically and selectively with the two microswitches  8  during either a clockwise or anti-clockwise rotation of the selection element  3 . In  FIG. 10 , in the rest position of the selection element  3 , the tip  8   a  of each microswitch  8  is not retracted. 
         [0074]    In  FIG. 11 , the selection element  3  has pivoted in the anti-clockwise direction around the pivot  6  and the protruding portion  16  has contacted one of the microswitches  8 , the one diametrically opposite, by taking as a centre the pivot  6 , at the lever  3   b  of the selection element  3 , and has retracted the tip  8   a  of this microswitch  8  for the detecting of the work position. 
         [0075]    Generally, as there are at least two work positions, the use of at least two detection sensors is required. Any type of sensor can therefore be used not only a set of at least two microswitches. 
         [0076]    For example, these sensors can be electronic without contact, for example a Hall effect sensor, an inductive sensor, a capacitive sensor, an RFID or radio-identification sensor, a reed sensor or sensor with flexible blades, photoelectric sensor, etc. In these cases, the selection element  3  is to be provided with an element that can be detected by the electronic sensor, for example a magnet for the Hall effect sensor. 
         [0077]      FIG. 12  shows another embodiment of the detecting of the work position of the selection element  3 . This detection is then done via the Hall effect. The head  3   a  of the selection element  3  then carried a magnet  17 . This magnet  17  during the pivoting of the selection element passes in the vicinity of at least one Hall effect sensor  18 , advantageously above or below the sensor. 
         [0078]    The positioning of the Hall effect sensor  18  corresponds to a work position of the selection element  3  in order to allow for the detection of the selection element in this work position. A Hall effect sensor  18  is provided for each work position, most frequently numbering two but able to be more than two. 
         [0079]    Advantageously, the two work positions of the selection element  3  are symmetrical and the magnet  17  is located between the two work positions therefore between the two Hall effect sensors. Advantageously, this magnet  17  is confounded with the anchoring point  3   c  of the return spring  7  present on the head  3   a  of the selection element  3  when the latter is present, which is not always the case, with another means of return also able to be used in association with one or several electronic sensors. 
         [0080]    By referring to all of the figures, the invention also relates to a method of operation of a machine  10  for preparing beverages by infusion, with the method comprising the step of selecting a mode of operation the machine  10  by action of the filter-holder device  1  on the selection element  3  and displacement of the latter in one of the work positions corresponding to said mode of operation and the step of starting the machine  10  with the selected mode of operation. 
         [0081]    The mode of operation, for example a starting of ground starting from the hopper of a grinder, is advantageously effective after reception of two pieces of information. The first piece of information is provided by the position of the selection element which will activate one of the dose sensors according to the choice of the user. The second piece of information is provided by the starting sensor of the ground by actuating of the sensor by the filter-holder device  1 , for example directly actuated by the cup of the filter-holder device  1 . 
         [0082]    Generally, the mode of operation selected can be operated only after detection of a suitable reception of the filter-holder device  1  in the reception interface  13 . 
         [0083]    Advantageously, a timer is set up between the selection by the selection element  3  of a mode of operation and the starting of the machine  10  with the selected mode of operation. This time makes it possible to prevent in the event of a false manipulation a starting of the machine  10  with a mode of operation chosen in error. 
         [0084]    Means for displaying a visual signal that indicate which mode of operation the machine has been selected can be provided on the machine. 
         [0085]    The invention is in no way limited to the embodiments described and shown which were provided only as examples. 
       REFERENCES 
       [0086]      1 . Filter-holder device 
         [0087]      1   a.  Handle 
         [0088]      2 . Cup 
         [0089]      3 . Selection element 
         [0090]      3   a.  Head 
         [0091]      3   b.  Lever 
         [0092]      3   c.  Anchoring point 
         [0093]      4 . Anchoring point 
         [0094]      5 . Beverage outlet 
         [0095]      6 . Pivot 
         [0096]      7 . Return spring 
         [0097]      7   a.  Deformable loop 
         [0098]      8 . Microswitch 
         [0099]      8   a.  Tip 
         [0100]      9 . Nipple 
         [0101]      10 . Grinder 
         [0102]      11 . Hopper 
         [0103]      12 . Core body 
         [0104]      13 . Reception interface 
         [0105]      14 . Support member 
         [0106]      15 . Lug 
         [0107]      16 . Protruding portion 
         [0108]      17 . Magnet 
         [0109]      18 . Hall effect sensor