Patent Publication Number: US-2021191325-A1

Title: Display change mechanism

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is claiming priority based on European Patent Application No. 19218749.0 filed on Dec. 20, 2019, the disclosure of which is incorporated herein in its entirely by reference. 
     TECHNICAL FIELD 
     The field of the present invention relates to that of watchmaking, and more specifically that of display mechanisms allowing to display two different pieces of information on the same dial and/or with the same indicator and preferably with the same hand. 
     Technological Background 
     Mechanical watches, and in particular complicated watches, are constructed so as to be able to display several indications such as the date, the month, the week, the power reserve, the time difference, etc., thus overloading the dial at the risk of losing readability. 
     Indeed, it is often complicated to read an indication as the dial is overloaded, not to mention the visual surface taken up by the hands and by the thickness of the hand-fitting, which leads to a thicker watch. Moreover, adding an additional hand involves additional elements and leads to a “pyramid” construction, as it is called in the art. 
     SUMMARY OF THE INVENTION 
     The present invention proposes to totally or partially resolve these disadvantages, and in particular to display several pieces of information on a single hand and the choice of the display is made at the request of the user by means of a push-button, for example, by means of a display mechanism comprising at least:
         a first counter: said at least one first counter being configured to be movable and to indicate a first piece of information;   a second counter: said at least one second counter being configured to be movable and to indicate a second piece of information;   a display mobile: said at least one display mobile being configured to display said first piece of information of said at least one first counter and/or to display said second piece of information of said at least one second counter;   a clutch organ: said at least one clutch organ being configured to displace said at least one display mobile between at least one first position so as to display said first piece of information and at least one second position so as to display said second piece of information; and,   a control organ: said at least one control organ being configured to displace said at least one clutch organ between said at least one first position and said at least one second position.       

     Thanks to this arrangement, it is possible to display and in particular to indicate two pieces of information via a single display mobile. Indeed, thanks to the present invention, it is possible to arrange several indications while keeping a clean design of the dial, a simplified mechanism because fewer elements are involved and a thinner watch. An advantage related to this arrangement is that two pieces of information do not need to have the same time base, and therefore can be jumping or dragging. 
     According to one embodiment, said at least one first counter is a first display cam or a first display core. 
     According to one embodiment, said at least one second counter is a second display cam or a second display core. 
     According to one embodiment, said at least one clutch organ is configured to bear on said at least one first counter and/or said at least one second counter so as to displace said at least one display mobile. 
     According to one embodiment, said at least one control organ is a control wheel. 
     According to one embodiment, said at least one display mobile is a display wheel. 
     According to one embodiment, said at least one clutch organ is connected by at least one mechanical connection to said at least one display mobile and to said at least one control organ. 
     Thanks to this arrangement, the displacement between said at least one first position and said at least one second position of said at least one clutch organ is dependent on said at least one control organ and said at least one display mobile. 
     According to one embodiment, said at least one mechanical connection comprises a pivot connection, in particular said at least one display mobile and/or said at least one control organ is mounted or are mounted on said at least one clutch organ, and preferably said at least one clutch organ is pivotally mounted on said at least one display mobile and/or on said at least one control organ. 
     According to one embodiment, said pivot connection is a blom stud or a pin. 
     Thanks to one of these arrangements, the displacement between said at least one first position and said at least one second position of said at least one clutch organ is achieved by pivoting. 
     According to one embodiment, said at least one display mobile and/or said at least one control organ comprises a groove configured to allow the sliding of said pivot connection of said at least one clutch organ, and preferably of said pin, and/or said at least one clutch organ comprises a groove configured to allow the sliding of said pivot connection, and preferably of said pin, of said at least one display mobile and/or of said at least one control organ. 
     Thanks to this arrangement, the displacement between said at least one first position and said at least one second position is achieved by pivoting and sliding said at least one clutch organ. 
     According to one embodiment, said at least one clutch organ comprises at least one actuating arm; said at least one control organ is configured to displace said at least one clutch organ by means of said at least one actuating arm. 
     Thanks to this arrangement, said at least one actuating arm allows the displacement of said at least one clutch organ when said at least one actuating arm is actuated by said at least one control organ. 
     According to one embodiment, the displacement of said at least one control organ causes the displacement of said at least one clutch organ by means of said at least one actuating arm. 
     Thanks to this arrangement, said at least one control organ controls the displacement of said at least one clutch organ by said at least one control organ. 
     According to one embodiment, said at least one actuating arm comprises said mechanical connection and/or said groove. 
     Thanks to this arrangement, said at least one control organ controls the displacement of said at least one actuating arm and consequently the displacement of said at least one clutch organ. 
     According to one embodiment, said at least one display mobile is configured to displace with a first speed, said at least one control organ is configured to displace with a second speed and said at least one clutch organ is configured to displace between said at least one first position and said at least one second position when said first speed of said at least one display mobile is different from said second speed of said at least one control organ. 
     According to one embodiment, when said first speed of said at least one display mobile is greater than said second speed of said at least one control organ, said at least one clutch organ displaces from said at least one first position to said at least one second position. 
     According to one embodiment, when said first speed of said at least one display mobile is less than said second speed of said at least one control organ, said at least one clutch organ displaces from said at least one second position to said at least one first position. 
     Thanks to either of these preceding arrangements, when the speeds of said at least one display mobile and of said at least one control organ are different, said at least one clutch organ is displaced between said at least one first position and said at least one second position. 
     According to one embodiment, said at least one first counter including at least one first abutment configured to limit the mobility of said at least one clutch organ when said at least one clutch organ drives said at least one display mobile to said at least one first position so as to display said first piece of information and preferably to stop said at least one clutch organ so that said at least one display mobile displays said first piece of information. 
     According to one embodiment, said at least one second counter including at least one second abutment configured to limit the mobility of said at least one clutch organ when said at least one clutch organ drives said at least one display mobile to said at least one second position so as to display said second piece of information and preferably to stop said at least one clutch organ so that said at least one display mobile displays said second piece of information. 
     Thanks to this arrangement, said at least one display mobile can indicate said first piece of information when said at least one clutch organ is in abutment against said at least one first abutment of said at least one first counter or said second piece of information when said at least one clutch organ is in abutment against said at least one second abutment of said at least one second counter. 
     According to one embodiment, said at least one first counter including at least one first bearing surface configured to contact said at least one clutch organ with said at least one first abutment when said at least one clutch organ is movable from said second position to said first position. 
     According to one embodiment, said at least one second counter including at least one second bearing surface configured to contact said at least one clutch organ with said at least one second abutment when said at least one clutch organ is movable from said first position to said second position. 
     According to one embodiment, said at least one clutch organ displaces said at least one display mobile to said at least one first position when said at least one clutch organ displaces bearing on said at least one first bearing surface. 
     According to one embodiment, said at least one clutch organ displaces said at least one display mobile to said at least one second position when said at least one clutch organ displaces bearing on said at least one second bearing surface. 
     According to one embodiment, said at least one first bearing surface has at least one first dimension configured to allow said at least one clutch organ at any point of contact to be brought to said at least one first abutment. 
     According to one embodiment, said at least one first abutment is a notch and/or a cavity on and/or in said at least one first bearing surface. 
     According to one embodiment, said at least one second bearing surface has at least one second dimension configured to allow said at least one clutch organ at any point of contact to be brought to said at least one second abutment. 
     According to one embodiment, said at least one second abutment is a notch and/or a cavity on and/or in said at least one second bearing surface. 
     According to one embodiment, said at least one second bearing surface is outside or inside said at least one second counter. 
     According to one embodiment, said at least one first bearing surface is inside or outside said at least one first counter. 
     According to one embodiment, said at least one second bearing surface has a core shape inside said at least one second counter. 
     According to one embodiment, said at least one first counter has a first cam shape. 
     According to one embodiment, said at least one second counter has a second cam shape. 
     Thanks to either of these preceding arrangements, said at least one clutch organ can drive said at least one first counter or said at least one second counter when it is in abutment against said at least one second abutment and/or said at least one second abutment respectively. 
     According to one embodiment, said at least one first counter and/or said at least one second counter comprises or comprise an inner toothing and/or outer toothing configured to be meshed and/or to mesh and preferably so that said at least one first counter and/or said at least one second counter operates or operate in a gear. 
     Thanks to this arrangement, said at least one first counter and/or said at least one second counter may be meshed or may mesh so as to indicate a first piece of information and/or a second piece of information respectively. 
     According to one embodiment, said at least one clutch organ comprises a pinion, a spindle and/or a pad in order to be bearing or to bear and preferably to mesh, roll and/or slide on said at least one first bearing surface or said at least one second bearing surface. 
     Thanks to this arrangement, said at least one clutch organ can drive said at least one display mobile by bearing and preferably by meshing, rolling and/or sliding on said at least one first counter or on said at least one second counter. 
     According to one embodiment, said at least one clutch organ comprises a bearing arm configured to be bearing or to bear on said at least one first bearing surface and/or on said at least one second bearing surface. 
     Thanks to this arrangement, said at least one clutch organ can drive said at least one display mobile by bearing and preferably by meshing, rolling and/or sliding on said at least one first counter or on said at least one second counter. 
     According to one embodiment, said at least one bearing arm is flexible and/or elastically deformable. 
     Thanks to this arrangement, said at least one bearing arm can exert and/or transmit a force on said at least one first bearing surface and/or on said at least one second bearing surface, and to allow to take up the toothing and pivoting clearances of the elements in order to prevent the display hand from twisting. 
     According to one embodiment, said bearing arm comprises said spindle and/or said pad. 
     According to one embodiment, said bearing arm comprises a dimension configured to allow said pinion, said spindle and/or said pad to traverse said at least one first bearing surface and/or said at least one second bearing surface to said at least one first abutment and/or said at least one second abutment. 
     Thanks to either of these preceding arrangements, said at least one clutch organ can reach said at least one first abutment and/or said at least one second abutment at any point of contact with said at least one first counter and/or said at least one second counter. 
     According to one embodiment, said dimension of said bearing arm, said groove of said at least one control organ and/or of said at least one clutch organ, said at least one first dimension and/or said at least one second dimension are related by their shape and preferably by a mathematical function so that at any point of contact said at least one clutch organ is brought to said at least one first abutment and/or to said at least one second abutment. 
     Thanks to this arrangement, said at least one clutch organ can reach said at least one first abutment and/or said at least one second abutment at any point of contact with said at least one first counter and/or said at least one second counter. 
     According to one embodiment, said at least one first counter and said at least one second counter are coplanar. 
     Thanks to this arrangement, space is saved. 
     According to one embodiment, said at least one first counter, said at least one second counter, said at least one control organ and/or said at least one display mobile, are movably mounted on at least one axis. 
     According to one embodiment, said at least one first counter, said at least one second counter, said at least one control organ and/or said at least one display mobile, are movably mounted around said at least one axis. 
     Thanks to either of these preceding arrangements, said display mechanism is adapted for a rotary and/or repetitive displacement. 
     According to one embodiment, said display mechanism comprises a differential configured to be driven by and/or to drive said at least one display mobile and/or said at least one control organ so as to distribute the kinetic force between said at least one display mobile and said at least one control organ and preferably between said first speed of said at least one display mobile and said second speed of said at least one control organ. 
     Thanks to this arrangement, the differential allows not to displace said at least one display mobile on the one hand when said at least one clutch organ displaces between said at least one first position and said at least one second position thanks to the force exerted by said at least one control organ on said at least one clutch organ, and on the other hand the energy of said force exerted by said at least one control organ on said at least one clutch organ is increased so as to allow said at least one clutch organ to reach said at least one first abutment or said at least one second abutment. 
     The embodiments and the variants mentioned above can be taken separately or in any technically possible combination. 
     The present invention will be well understood and its advantages will also become apparent in light of the description which follows, given only by way of non-limiting example and made with reference to the appended figures, wherein identical reference signs correspond to structurally and/or functionally identical or similar elements. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
       The invention will be described in more detail below using the appended drawings, given by way of non-limiting examples, wherein: 
         FIGS. 1 &amp; 2  show, according to one embodiment, at least one first counter  110  and at least one second counter  120  respectively; 
         FIG. 3  illustrates at least one control organ  140  according to one embodiment; 
         FIG. 4  shows at least one clutch organ  130  and at least one display mobile  150  according to one embodiment; 
         FIG. 5  shows an example of differential  170 , according to one embodiment; 
         FIGS. 6 &amp; 7  show an example of a display mechanism  100  seen from above and seen from below; and, 
         FIG. 8  illustrates an embodiment of said implemented display mechanism. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The present invention proposes to display and in particular to indicate two pieces of information via a single display mobile  150 , illustrated in  FIG. 4 , so as to be able to arrange several indications while keeping a clean dial design. 
     For this purpose, the invention is in the form of a display mechanism  100  comprising at least one first counter  110 , shown in  FIG. 1 , configured to be movable and to indicate a first piece of information and at least one second counter  120 , shown in  FIG. 2 , also configured to be movable and also to indicate a second piece of information. 
     Typically, as shown in  FIG. 1 , said at least one first counter  110  may be in the shape of a first display cam  110  or a first display core  110 , just like said at least one second counter  120 , which can also be a second display cam  120  or a second display core  120 , see for example  FIG. 2 . 
     Said display mechanism  100  of the present invention also comprises at least one display mobile  150 , typically a display wheel  150 , configured to display said first piece of information of said at least one first counter  110  and/or to display said second piece of information of said at least one second counter  120  and allowing an indicator to indicate either said first piece of information or said second piece of information. 
     This change of indication is allowed by at least one clutch organ  130  which allows the displacement of said at least one display mobile  150  between at least one first position  131  so as to display said first piece of information and at least one second position  132  so as to display said second piece of information. 
     Said at least one clutch organ  130  is controlled by at least one control organ  140 , which may be in the shape of a control wheel  140 , to be displaced between said at least one first position  131  and said at least one second position  132 . Indeed, said at least one clutch organ  130  is configured to be able to bear on said at least one first counter  110  and/or said at least one second counter  120  so as to displace said at least one display mobile  150  until either said first piece of information or said second piece of information is displayed. 
     Indeed, according to the embodiment illustrated in  FIG. 1 , said at least one first counter  110  may include at least one first bearing surface  112  configured to allow the bearing of said at least one clutch organ  130 , or more particularly to allow the mobility of said at least one clutch organ  130 . Said at least one clutch organ  130  can thus displace said at least one display mobile  150  to said at least one first position  131  when said at least one clutch organ  130  displaces bearing on said at least one first bearing surface  112 . 
     This mobility of said at least one clutch organ  130  may be limited by the presence of at least one first abutment  111 , which may be in the shape of a notch and/or a cavity on and/or in said at least one first bearing surface  112 , present on said at least one first counter  110  so that when said at least one clutch organ  130  drives said at least one display mobile  150  to said at least one first position  131  to display said first piece of information, said at least one first abutment  111  stops said at least one clutch organ  130  so that said at least one display mobile  150  displays said first piece of information. 
     The configuration of said at least one second counter  120  is roughly similar to that of said at least one first counter  110 , since said at least one second counter  120  also includes at least one second abutment  121 , which according to the embodiments, can be a notch and/or a cavity on and/or in said at least one second bearing surface  122 , and at least one second bearing surface  122  configured to contact said at least one clutch organ  130  with said at least one second abutment  121 . Just like for said at least one first counter  110 , said at least one clutch organ  130  can also displace said at least one display mobile  150  to said at least one second position  132  when said at least one clutch organ  130  displaces bearing on said at least one second bearing surface  122 . 
     According to embodiments, said at least one first bearing surface  112  has more specifically at least one first dimension to allow said at least one clutch organ  130  to be brought to said at least one first abutment  111  at any point of contact with said at least one first bearing surface  112 , just like said at least one second bearing surface  122 , which may also have at least one second dimension configured to allow said at least one clutch organ  130  at any point of contact to be brought to said at least one second abutment  121 . 
     These bearing surfaces, that is to say said at least one first bearing surface  112  and said at least one second bearing surface  122  may be outside or inside said at least one first counter  110  and/or said at least one second counter  120  respectively. However, it should be noted that despite the fact that said at least one first bearing surface  112  and said at least one second bearing surface  122  have a core shape, whether it is outside or inside said at least one first counter  110  and/or said at least one second counter  120 , said at least one first bearing surface  112  and at least one second bearing surface  122  may have other shapes and in an independent manner. 
     In addition, still in relation with said at least one first counter  110  and/or said at least one second counter  120 , it can comprise or they can comprise, according to the embodiments, an inner toothing and/or outer toothing configured to be meshed and/or to mesh and preferably so that said at least one first counter  110  and/or said at least one second counter  120  operates or operate in a gear so as to indicate a first piece of information and/or a second piece of information respectively. 
     Thus, the mobility of said at least one clutch organ  130  is limited by said at least one second abutment  121  so that said at least one clutch organ  130  can drive said at least one display mobile  150  to said at least one second position  132  and therefore display said second piece of information and preferably to stop said at least one clutch organ  130  so that said at least one display mobile  150  displays said second piece of information. 
     Therefore, said at least one display mobile  150  can indicate said first piece of information when said at least one clutch organ  130  is in abutment against said at least one first abutment  111  of said at least one first counter  110  or said second piece of information when said at least one clutch organ  130  is in abutment against said at least one second abutment  121  of said at least one second counter  120 . 
     More specifically, the displacement of said at least one clutch organ  130  between said at least one first position  131  and said at least one second position  132  is carried out when said at least one display mobile  150  displaces with a first speed and said at least one control organ  140  displaces with a second speed different from said first speed of said at least one display mobile  150 . Indeed, when said first speed of said at least one display mobile  150  is greater than said second speed of said at least one control organ  140 , said at least one clutch organ  130  displaces from said at least one first position  131  to said at least one second position  132 , for example and when said first speed of said at least one display mobile  150  is less than said second speed of said at least one control organ  140 , said at least one clutch organ  130  displaces from said at least one second position  132  to said at least one first position  131 . 
     Indeed, since when the speeds of said at least one display mobile  150  and of said at least one control organ  140  are different, the mechanical connection  160  is biased by means of said blom stud  161  and said pin  162 , which allows said at least one clutch organ  130  to displace or to be displaced between said at least one first position  131  and said at least one second position  132 . 
     Moreover, to this end, said display mechanism  100  comprises a differential  170  configured to be driven by and/or to drive said at least one display mobile  150  and/or said at least one control organ  140  so as to distribute the kinetic force between said at least one display mobile  150  and said at least one control organ  140  and preferably between said first speed of said at least one display mobile  150  and said second speed of said at least one control organ  140  so that said at least one display mobile  150  is not displaced, on the one hand when said at least one clutch organ  130  displaces between said at least one first position  131  and said at least one second position  132  thanks to the force exerted by said at least one control organ  140  on said at least one clutch organ  130 , and on the other hand the energy of said force exerted by said at least one control organ  140  on said at least one clutch organ  130  is increased so as to allow said at least one clutch organ  130  to reach said at least one first abutment  111  or said at least one second abutment  121 . 
     As shown in  FIGS. 6 and 7 , said at least one clutch organ  130  is connected by at least one mechanical connection  160  to said at least one display mobile  150  and to said at least one control organ  140  so that the displacement between said at least one first position  131  and said at least one second position  132  of said at least one clutch organ  130  is dependent on said at least one control organ  140  and on said at least one display mobile  150 . 
     Said at least one mechanical connection  160  may be a pivot connection  161 , and more specifically a blom stud  161  or a pin  162 , in particular said at least one display mobile  150  and/or said at least one control organ  140  is mounted or are mounted on said at least one clutch organ  130 . It is also possible to consider that said at least one clutch organ  130  is pivotally mounted on said at least one display mobile  150  and/or on said at least one control organ  140 , so that the displacement between said at least one first position  131  and said at least one second position  132  of said at least one clutch organ  130  is carried out by pivoting. 
     Furthermore, this pivoting can facilitate and/or save space if said at least one first counter  110  and said at least one second counter  120  can be coplanar. In the embodiment illustrated in  FIGS. 6 and 7 , said at least one first counter  110 , said at least one second counter  120 , said at least one control organ  140  and/or said at least one display mobile  150 , are movably mounted on at least one axis or even around said at least one axis so that said display mechanism  100  is adapted for rotary and/or repetitive displacement. 
     Still with regard to this pivoting, said at least one mechanical connection  160  is a pin  162  allowing said at least one display mobile  150  and said at least one clutch organ  130  to pivot relative to each other and in particular, said at least one clutch organ  130  comprises a pin  162  and said at least one display mobile  150  a housing for accommodating said pin  162 , as shown in the embodiment of  FIG. 4 , for example. 
     Furthermore, according to one embodiment, said at least one display mobile  150  and/or said at least one control organ  140  may comprise a groove  163  configured to allow the sliding of said pivot connection of said at least one clutch organ  130  and/or said at least one clutch organ  130  comprises a groove  163  configured to allow the sliding of said pivot connection of said at least one display mobile  150  and/or of said at least one control organ  140 . 
     In the embodiment of  FIG. 3 , only said at least one control organ  140  comprises a groove  163  and said at least one mechanical connection  160  is made by said blom stud  161  which can slide in said groove  163  so as to perform the displacement between said at least one first position  131  and said at least one second position  132  by pivoting and sliding said at least one clutch organ  130 . 
     It should also be indicated that said at least one actuating arm  136  may comprise said mechanical connection  160  and/or said groove  163 , according to some embodiments, so that said at least one control organ  140  controls the displacement of said at least one actuating arm  136  and consequently the displacement of said at least one clutch organ  130 . 
     Said at least one clutch organ  130 , described just before, comprises on the one hand at least one actuating arm  136  and on the other hand at least one bearing arm  137 . According to the embodiments, said at least one actuating arm  136  and said at least one bearing arm  137  can be located on either side of said blom stud  161 . 
     Said at least one actuating arm  136  is used to displace said at least one clutch organ  130  via said pin  162  which may be located at the end of said at least one clutch organ  130  and consequently, at the end of said at least one actuating arm  136 , so that when said at least one actuating arm  136  is actuated by said at least one control organ  140 , said at least one actuating arm  136  displaces said at least one clutch organ  130  around the pivot connection  160 . 
     As can be understood, the displacement of said at least one control organ  140  causes the displacement of said at least one clutch organ  130  by means of said at least one actuating arm  136 . 
     As mentioned above, said at least one bearing arm  137  is located on the other side of said at least one clutch organ  130  relative to said at least one actuating arm  136 . A pinion, a spindle  139  and/or a pad, is located at another end of said at least one clutch organ  130 , more specifically at the end of said at least one bearing arm  137 , according to the embodiments, in order to be bearing or to bear and preferably to mesh, roll and/or slide on said at least one first bearing surface  112  or said at least one second bearing surface  122 , which allows said at least one clutch organ  130  to be movable when it is in contact with said at least one first counter  110  or said at least one second counter  120  and therefore drive said at least one display mobile  150  by bearing and preferably by meshing, rolling and/or sliding on said at least one first counter  110  or on said at least one second counter  120 . 
     Moreover, one of the features of said at least one bearing arm  137  is that it is flexible and/or elastically deformable, which allows the latter to exert and/or transmit a force on said at least one first bearing surface  112  and/or on said at least one second bearing surface  122 , and to allow to take up the toothing and pivoting clearances of the elements in order to prevent the display hand from twisting. 
     In addition, said bearing arm  137  may comprise a dimension configured to allow said pinion, said spindle  139  and/or said pad to traverse said at least one first bearing surface  112  and/or said at least one second bearing surface  122  to said at least one first abutment  111  and/or said at least one second abutment  121 , so as to be able to reach said at least one first abutment  111  and/or said at least one second abutment  121  at any point of contact with said at least one first counter  110  and/or said at least one second counter  120 . Moreover, according to one embodiment, said dimension of said bearing arm  137 , said groove  163  of said at least one control organ  140  and/or of said at least one clutch organ  130 , said at least one first dimension and/or said at least one second dimension may be related by their shape and preferably by a mathematical function so that at any point of contact said at least one clutch organ  130  is brought to said at least one first abutment  111  and/or to said at least one second abutment  121 . 
     In the embodiment of  FIGS. 6 and 7 , at least one first counter  110 , which may be in the shape of a first display core  110  or a first display cam  110  as shown in  FIGS. 6 &amp; 7 , or is related to a first piece of information, for example the date, and at least one second counter  120 , a second display cam  120  or a second display core  120  as illustrated in  FIGS. 6 &amp; 7 , is related to a second piece of information, for example the second. Said at least one first counter  110  and at least one second counter  120  are coaxial and at the same height, that is to say coincident in the same plane. 
     Said display mechanism  100  also comprises at least one display mobile  150  including at least one clutch organ  130  on which a spindle  139  pivots. Said at least one clutch organ  130  is constrained on one of said at least one first counter  110  and at least one second counter  120  by means of at least one control organ  140  which can act on a pin  162 . In one of the display positions, said spindle  139  is in a notch of said at least one second counter  120 . Being driven by the movement (not shown), said at least one second counter  120  thus drives said at least one display mobile  150 . The movement therefore displays said first piece of information of said at least one first counter  110 . 
     In other words, in the embodiment shown in  FIGS. 6 &amp; 7 , said at least one control organ  140  comprises a groove  163 , or more commonly called a “loop”, which so as not to be offset relative to said at least one clutch organ  130 , said at least one display mobile  150  drives said at least one control organ  140  at the same speed by means of a first input  171  of a differential  170 . The second input  172  of said differential  170  is linked to a rack  191  which feels a display change cam  192 . The speed of rotation of said at least one control organ  140  is the sum of the speeds of said first input  171  and of said second input  172 . 
     Indeed, for example, when the user controls the change of display, a star  194 . Said aforementioned cams  192 ,  193  are driven on said star  194 , they also rotate. The first degrees of rotation of said cams  192 ,  193  allow to release a brake  195  which acts on said first input  171  of said differential  170 . While said brake  195  is maintained, a feeler of said rack  191  will switch to a jag of said display change cam  192  thus actuating said second input  172  of said differential  170 . The latter, that is to say said second input  172  of said differential  170  being maintained and an output  173  of said differential  170  being free, the rotation of said rack  191  will drive said output  173  of said differential  170  and therefore said at least one clutch organ  130 . 
     By means of said pin  162  and said loop of said at least one clutch organ  130 , a bearing arm  137  comprised by said at least one clutch organ  130  will pivot until said spindle  139  is in contact with said at least one first counter  110 . Said spindle  139  will then roll to at least one second abutment  121 , which may be in the shape of a notch  121 , of said at least one first counter  110  thus driving a display wheel. The system then displays said second piece of information of said at least one second counter  120 . 
     The arrangement of said cams  192 ,  193  allows the components to be moved in the following order:
         Switching said first piece of information of said at least one first counter  110  to said second piece of information of said at least one second counter  120 : Placing and maintaining said brake  195  then activating said differential  170 ;   Switching said second piece of information of said at least one second counter  120  to said first piece of information of said at least one first counter  110 : maintaining said brake  195  then activating said differential  170  and releasing said brake  195 ;       

     In another mode of use, the cam  193  can be removed. In this embodiment, the differential as well as the loop of the clutch organ  130  are arranged so that the action of the input  172  of the differential causes the outputs  170 ,  171  to rotate in the opposite direction. The natural movement of the elements causes the pin  162  to slide on the loop of the clutch organ  130  in order to change the display. This mode of use allows to eliminate having to act on the sequencing of cams  192 ,  193 . 
     The displays being driven by the movement and the forces required to switch from one display to another are to be overcome by the user, the torque required by said first piece of information of said at least one first counter  110  is low since only the friction in the geartrain are to be overcome. 
     By modifying the geometry of the cam, it is possible to deactivate the brake at each end of the display change. In conclusion, the system requires very little torque to be power supplied. The resulting advantage is the possibility of displaying the second on one of the two displays without disturbing the working of the movement, for example. 
     In addition, according to the embodiments, it is possible to have an additional bearing arm opposite said bearing arm  137 , on a different level for example in order to add different information, so as to display  4  different information with the same hand while leaving the possibility to the user to switch from one to the other. 
     For this purpose, it is necessary to add additional cams at the same level as the additional bearing arm and to modify the loop in said at least one control organ  140  and by adding another one acting on the second arm and finally, increase the number of cams from two to four bearings at said cam  192 .