FR2846468A1 - Interior car seat/rear view mirror adjustment having two axis rotation adjustment with push button activating axes manipulation moving using two pieces forming interface. - Google Patents

Abstract

The two axis rotating adjustment has a push button allowing rotation in first and second axes and placed on the support face of an electric circuit. The button activates manipulation movement in one of two orientation planes with transmission effected using two pieces forming an interface.

Description

i The present invention relates to a control member provided with a button

  rotary manipulation for actuating a first function, said button can also in some cases operate as a push button and be actuated along different axes of movement, for example by axial pressure at certain points on its periphery. The corresponding peripheral locations are then of course indicated to the user by means of appropriate signaling, and

  each generate the implementation of a separate function.

  For a conventional button, for example with a cylindrical appearance, it is in particular possible to provide four peripheral support zones located 900 away from each other, and allowing with the rotation to lead to the

  control of at least five to six different functions.

  This type of control member finds its place in particular in the passenger compartments of motor vehicles, for example for the control of the various parts of a seat, or for the adjustment of the right and

left, etc ...

  These members are relatively complex, since they must transmit displacements which must be able to be clearly distinguished despite the relative narrowness of the surface on which the control is carried out. Current solutions use the two surfaces of a printed circuit to jointly perform the functions corresponding to rotary and axial movements in the reduced space which is allocated to the button. For obvious economic reasons, this type of control member must, however, be designed with the minimum of parts, these must in addition be as simple as possible, so that the costs of both

  manufacturing and assembly are as small as possible.

  The main objective of the present invention is the optimization of the design of the various elements participating in the operation of the control member, in order to propose a global solution simplified as much as possible, and therefore reliable and offering high durability. Thus, the control member which is the object uses only one of the faces of the printed circuit with which it cooperates, which provides an appreciable gain in space, as well as an advantage. undeniable economic 35, both in terms of the number of parts to be assembled and in terms of

assembly time.

  In fact, the control member according to the invention is provided with a rotary manipulation button around a first axis, and which can be rotated around at least one secondary axis contained in a plane

  perpendicular to the first axis, by elastic support on at least one location located in the vicinity of the periphery of said manipulation button, and of an electrical circuit provided with components able to switch according to the stresses applied to the button. In addition to rotation, the button can be in certain configurations manipulated in translation around the first axis.

  It is mainly characterized in that said button is secured to an actuator which transmits the manipulation movement to the components, which are arranged on one face of a support of the circuit 10 facing the button, the transmission being effected via at least two parts forming an interface between said actuator and said circuit, on the one hand a rotor integral in rotation with the actuator around the first axis, the mechanical connection between them being further provided to allow relative displacements along the axis or axes secondary, and on the other hand a fixed plate comprising elastic means of connection with the electric circuit, which are arranged substantially in line with the locations

support devices.

  The essential elements of the device of the invention are therefore, in addition to the manipulation button, an actuator, an electrical circuit and two parts, the rotor and the plate, one of which is fixed relative to the frame in which is installed the control member and the other is movable in rotation about the first axis of manipulation of the button, and whose action is effected on components arranged substantially in the same plane and oriented towards the

  constituent elements of said organ.

  The control of this member is therefore done either by rotating it around said axis, or by exerting pressure, centrally or

  at specific points on the periphery.

  Preferably, the electrical circuit is located on the same face of a printed circuit, which therefore constitutes the aforementioned support. This solution is economically very favorable because it allows mounting

  simplified of the various components on said printed circuit on the one hand, and of the control member in its environment on the other hand, without having to provide for the additional installation of other components / printed circuits, for example for the operation of a light emitting diode for signaling.

  According to one possibility, a sheet of elastic insulating material can be interposed between on the one hand the fixed plate and its elastic means of

  connection with the electrical circuit, and on the other hand said circuit.

  This sheet plays a mechanical role, and can for example include

  moving parts of circuit switching contacts. It then ensures, by its mechanical properties, in particular elastic properties, that said moving parts return to a stable position during the rest phase, as well as a particular tactile sensation when it is stressed. Other solutions without this layer are of course perfectly usable.

  In fact, more precisely, the fixed plate, forming one of the essential constituents of the control member, takes the form of a thin plate from which protrude studs of parallel shape to the first axis, in number corresponding to 10 number of support locations

  peripherals, said studs projecting from at least one side of the plate and being arranged at the free end of at least one flexible tab for each support location, the tab or tabs being formed in the plate and made of a material elastic allowing them to return to the rest position after action on the studs.

  According to one possibility, for each support location, there are two flexible tabs. They are superimposed and connected to each other at their ends by the same direction stud parallel to the first axis. This makes it possible to improve the direction of transmission of the forces by pressing the contact in a direction parallel to said first.

  axis. According to one of its main functions, this plate is used to transmit a pressure - exerted on the periphery of the manipulation button - to the electrical circuit, if necessary via the aforementioned ply.

  A reset is necessary after each manipulation, hence the need for elastic tabs. This part is preferably made of rigid plastic, but having mechanical characteristics

  of elasticity implemented via the tabs.

  The plate further comprises means for guiding the actuator towards the studs, which in fact ensure the management of the rotations around the secondary axes. More specifically, it presents, in its central area, a

  orifice of complex shape, formed by a number of converging radial slots at most equal to the number of studs / tongues arranged on the periphery, and developing in the direction thereof. Preferably, the number of radial slots is equal to that of the studs, and said slots develop precisely in the direction of said studs.

  This guidance must in fact be carried out with sufficient precision so that there is no possible interference in the information which is retransmitted from the manipulation button to the electrical circuit, whatever

  the number of pads that must be actuated.

  The existence of a rotating part actuating contacts requires in

  number of cases, when there are several separate contacts, an indexing of the position of the rotor relative to the frame in which the control member is arranged. This is the reason why, according to the invention, means are provided for indexing said rotor, which however are only applicable in certain configurations.

  According to one possibility, the plate comprises on one side, at the immediate periphery of the ends of said slots, a crown with reliefs and

  depressions, cooperating with a protruding protrusion of the rotor.

  As a variant, said crown could be integrated into the rotor. In both cases, it cooperates with a relief, boss, finger, etc. located respectively on the rotor or disposed fixed relative to the frame, that is to say

  for example fixed to said frame or to the plate.

  According to a possible configuration, this rotor has a central housing 15 delimited by a cylindrical wall placed on a base formed

  of a flat plate, for example circular.

  The actuator, disposed between the manipulation button and the fixed plate, comprises a central shaft arranged along the first axis of rotation, of dimensions provided so that it can be guided in the slots made in the plate, and comprising a disc perpendicular whose radius is such that it can, when the actuator is manipulated along a secondary axis, exert an action on the peripheral stud (s) of said plate, on

  which it rests in the absence of such manipulation.

  It is ultimately the interaction between the central shaft and the fixed plate which imposes a particular dimensioning both at the radial slots made in the plate and at said shaft, so that the guidance

mentioned could take place.

  The central shaft and the disc are, according to a variant in which the

  button cannot be used as a push button (that is to say undergo an axial translation), integral with one another.

  The disc can be seen as an amplifying organ which transmits,

  when certain conditions are fulfilled (displacement possible according in particular to the existence of a radial slot in the direction of movement), the movements along the secondary axes of rotation 35 printed on the manipulation button.

  Besides the fixed plate, the actuator cooperates as mentioned

  previously with the mobile rotor rotating around the first axis.

  To this end, an end portion of the central shaft adjusts, with a radial clearance, in the central housing of the rotor, said portion being limited by a flange forming an axial stop in contact with the wall, the radial clearance allowing a angular displacement of the shaft relative to the secondary axes, means being further provided for joining them in

  rotation relative to the first axis.

  According to its main function, the rotor transmits to the electrical circuit

  rotary movement around the first axis printed on the manipulation button. To this end, according to one possibility, the wall is cylindrical and the end portion of the actuator, also cylindrical, comprises at least one radial lug which can be inserted in a notch formed in said wall, in order to secure them in rotation.

  This configuration is also favorable in that it allows the transmission of cylindrical movements around the secondary axes,

  another function fulfilled by the rotor.

  In fact, preferably, said end portion comprises two opposite radial lugs 15 fitting into two diametrically opposite notches

of the low wall.

  In this configuration, the angular movement along the secondary axes is obtained by pressing the flange providing the central shaft of the actuator on the wall housing the end of the latter, punctually creating a pivot axis only during movement

  of rotation and when the latter is authorized by the radial slots of the plate, the ends of which then act as a stop. Alternatively, these stops, or even the guiding of the movement with respect to these secondary axes, can be managed at the crossing by the central shaft 25 of the table from which the manipulation button protrudes.

  According to another variant, the central shaft and the disc can be secured only in rotation, but left free, relatively to one another, in translation. In this case, the button can be used as

  push button free in translation along a central axis.

  In this hypothesis, preferably, the disc can be guided, during the rotations around the secondary axes, between the plate and the table crossed by the central shaft and separating the button from the other elements of

the control unit.

  The table in question hides the operation of the various control members, of which only the external buttons or joysticks are

accessible to the user.

  This table and the plate each comprise for example a dome whose apex is pierced for the passage of the central shaft, said domes being coaxial and forming a space in which the disc is guided, equipped on the one hand with radial ribs at the end rounded on its face opposite said table, and on the other hand a dome recess on the other face, said rounded ends and said recess having curvatures

  corresponding respectively to that of their opposite dome.

  The possibility of a relative translational movement between the central shaft and the actuator disc indeed imposes precise guiding of the disc for rotations around the secondary axes, which can no longer depend

from the central tree.

  More specifically, the dome of the table and the dome recess of the disc comprise, at their base, an annular relief having an interior surface whose shape is designed to adapt respectively to

  the rounding of the ribs and the dome of the plate.

  Said annular reliefs make it possible to achieve correct guiding in

  reducing the stresses, in particular friction, during the relative movements of the different parts involved in the connection.

  Freedom in translation shaft / disc can be obtained, according to a possible configuration, in the following way: the central shaft can comprise grooves fitting in axial slides of an axial duct passing through the disc, in order to block them in rotation and to allow guiding in translation. Said axial duct also includes a stop limiting the translation in the direction of the operating button.

  The rotor is rotated, in this variant, by the disc.

  This comprises for this purpose two tabs oriented parallel to the orifice 25 for guiding the central shaft, and housed in notches made in the wall of the rotor with a view to securing in rotation, the respective dimensions of the notches and legs authorizing a

  angular movement around the secondary axes of rotation.

  There is therefore a clearance between the widths of the notches and those of said legs, so that there is no opposition to rotation, certainly

  limited, depending on the secondary axes.

  The translational freedom of the central shaft relative to the disc obviously has a purpose. This is to activate, via a strictly axial thrust, at least one other switch of the circuit. To this end, the free end of the central shaft rests on a pusher guided in translation inside the wall of the rotor, and comprising at least one lug capable of crossing the base of the rotor in order to actuate at least one switch, the rotor having at least one orifice for this purpose. A spring is further provided to recall said pusher and the central shaft in the position of non-actuation of the switch or switches, in the absence of stress.

axial of the button.

  More specifically, the pusher comprises a surface substantially perpendicular to the axis of the central shaft and two lateral tabs guided 5 in slides made in the inner wall of the wall so that said pusher can be pushed into said wall by action of the central shaft, the spring being interposed between said circular surface and the base of the rotor. It should be noted that the free end of the central shaft is hemispherical, so as not to hinder the possibility of movements along the secondary axes. According to the invention, there may be provided a second coaxial wall of cylindrical appearance surmounted by a boss which cooperates with the crown.

  indexing plate, which is also secured to the base of the rotor.

  This second low wall in this case takes charge of indexing the rotation, in cooperation with the relief crown of the fixed plate provided

peripheral studs.

  As indicated above, one of the main functions of this rotor is to transmit a rotary movement along the first axis. The transmission 20 obviously only makes sense with respect to the electrical circuit, for example arranged on a printed circuit. In this context, the base of the rotor comprises, associated with its face opposite to that which presents the walls, means for cooperating with components, contacts or tracks of the electrical circuit, aiming to achieve at least one switching during the rotation along the first axis, said means allowing where appropriate the

  passage of at least one tab of the pusher.

  These means can be various, for example consisting of a plate

  conductive comprising at least one conductive member projecting from the plane of the plate, capable of sliding at least temporarily on tracks of the electrical circuit to switch the state of at least one contact of said circuit.

  Still on the subject of said electrical circuit, it may include

  microswitches placed under the elastic pads protruding from the plate. The peripheral studs of the plate are in fact moved along a path which is approximately rectilinear, that is to say with an appearance parallel to the first axis, in order to exert an adequate action on these switches.

  According to a variant, the means for detecting the change of state may be magnetic, and in particular use the Hall effect. Each Hall effect sensor can detect changes made to the magnetic field by a movable magnet either in translation like the aforementioned studs, or in rotation if it is linked to the first rotating part. other

  solutions, for example optical, are obviously also possible.

  The central shaft of the actuator can be arranged in the axis of a diode

  light emitting circuit, and be provided in transparent material 5, for example polycarbonate, to transmit light information at the manipulation button.

  In the case of the use of a printed circuit, all the components, including the diode, are arranged on the same face of the circuit. This is a decisive advantage compared to the devices of the prior art, in which two-sided printed circuits were used, with the switching at

  rotary actuation on the face opposite the button, and the switches generated by action at the periphery of the button managed by an arm passing through the printed circuit and cooperating with a carriage movable in at least two directions. In general, the light-emitting diode was then placed on another printed circuit placed under the first.

  The multiplication of parts and the assembly then made the control unit much more expensive than in the configuration of the invention. The invention will now be described in more detail, with reference to the appended figures, for which: - Figure 1 is a perspective view of a control panel for functions associated with a motor vehicle seat incorporating a control according to the invention; FIG. 2 shows, still in perspective, the various components constituting the control member of the invention, with the exception of the manipulation button in a first version with a button devoid of the push function; - Figure 3 shows the three main mechanical elements of the previous figure; - Figure 4 shows the back of the fixed plate; - Figure 5 also shows the back of the rotor, which is movable in rotation; - Figure 6 illustrates the mechanical connection between the actuator and the rotor of the previous figure; - Figure 7 shows in perspective the elements which are directly in contact with the printed circuit placed at the base of the control member of the invention; - Figure 8 is an exploded perspective of a configuration according to the second variant offered by the invention; and

  - Figure 9 is a sectional view of this assembled configuration.

  Referring to Figure 1, the manipulation button (1) of the

  control of the invention is located substantially in the middle of a plate (2) simultaneously integrating other control keys (3, 4) and a zone (5) conveying information as to the commands implemented.

  In such an application, the control member according to the invention makes it possible to move each element of the vehicle seat, beforehand

  selected using the control keys referenced (3).

  This member, without the manipulation button (1) which appears in Figure 1, is shown in more detail in Figure 2. It comprises, superimposed, an actuator (6), an intermediate plate (7), which is fixed relative to to the frame of the assembly (2), a rotor (8) movable in rotation driven by the actuator (6), and a sheet (9) surmounting a printed circuit (10) integrating the various components of the electrical circuit. These elements

  have a symmetry of revolution with respect to the first axis.

  The constitution and function of these different components is shown

  in more detail in the following figures.

  Thus, as appears in FIG. 3, the actuator (6) comprises a central shaft (1 1) the upper end of which is fixed to the manipulation button (1) appearing in FIG. 1. The lower end of this shaft central (11) has a portion (12) of diameter greater than that of the shaft (11) provided with two cylindrical pins (14, 14 ') diametrically opposite. Above the collar, the actuator (6) has a disc (15) surmounted by ribs (16), the operation of which will be explained below. In this hypothesis, the shaft (11) and the disc (15) are secured,

  or even made in one piece.

  The end portion (12) of the shaft (11) is designed to be housed in the housing (17) of the rotor (8), housing (17) which is delimited by a wall (18) having two notches ( 19, 19 '). These are designed to

  accommodate the pins (14, 14 '), so as to block the connection in rotation.

  The rotor (8) further comprises an outer wall (20), of thickness

higher than the low wall (18).

  The plate (7), fixed relative to the frame (2), is interposed between the disc (15) and the portion (12), that is to say above the rotor (8). It comprises, in its center, an orifice (22) in the shape of a cross, that is to say having four radial slots of width such that the central shaft (11) can move there. At the periphery, this plate (7) has four tabs (23), each provided

  at its end of a stud (24) protruding with respect to its two faces.

  When the control member (1) according to the invention is mounted as shown in Figure 2, the periphery of the disc (15) is located at said pads (24), which it surmounts. When the manipulation button (1) is rotated around a

  secondary axis perpendicular to the axis (A), by pressing on one of the zones represented in FIG. 1 by triangles arranged opposite the manipulation button (1), the disc (15) reflects this rotation to one of the pins 10 (24), which moves by bending the corresponding strip (23).

  The stud (24) then undergoes a displacement substantially parallel to the axis (A), downwards, and exerts pressure on a protuberance (25) of the ply (9) (see FIG. 7) located in the axis of its displacement. According to one possibility, the protuberance (25) contains a metal pad forming the movable part of a contact arranged on the printed circuit (10). In that case,

  a peripheral pressure on the manipulation button amounts to closing a contact of the printed circuit (10). The plate (7) is made of a rigid material, but which has elasticity properties such that each strip returns to its initial position when the pressure on the manipulation button (1) ceases.

  Figure 4 shows this same plate (7) isolated. The cross hole (22)

  appears more clearly than in Figure 3.

  Rotation around a secondary axis is possible due to the play of the

  portion (12) in the wall (18), but is only possible if the central shaft 25 (11) is guided in a radial slot of the orifice (22) of the plate (7).

  The underside of the rotor (8) is shown in FIG. 5. It comprises a metal part (27), which is fixed on said face, and is itself provided with two curved tongues (28, 28 ') which can slide on corresponding tracks of the printed circuit (10), so as to switch the state of at least one contact of said circuit (10). To this end, the blades (28,28 ') are slightly bent so as to protrude from the plane of the part (27), the elasticity of the metal allowing sliding contact on the tracks of the

printed circuit (10).

  The object of FIG. 6 is to specify the mechanical connection between the actuator (6) and the rotor (8), as has been explained previously. The lugs (14, 14 '), integrated in the notches (19, 19'), ensure the connection in rotation. This figure shows the existence of four ribs (16) of

  stiffening of the disc (15) of the actuator (6).

  1 1 The purpose of Figure 7 is to show more particularly the electrical interactions that take place at the base of the control member of the invention. Thus, the conductive plate (27), in principle fixed to the rotor (8), is here represented directly on the printed circuit (10) with which it interacts. Likewise, the ply of flexible and elastic material (9), which in this case comprises moving parts of the electrical circuit, for example contact elements, is shown in the position which is allocated to it relatively on the one hand to the circuit printed (10), and secondly to the metal plate (27). A light emitting diode (not shown) can for example be placed in the center of the plate (27), in the axis of the shaft

  (11), which will then be made of a light-conducting material.

  In Figures 8 and 9, the variant in which the disc (15) is free in translation relative to the shaft (8) is presented. The references of the 15 different components found in the previous figures remain the same. In fact, in this new variant, the main modifications concern the existence of a pusher (29) arranged in the axis of

  the shaft (8), and on the upper surface of which the latter rests.

  This pusher (29) has two lateral tabs (30, 30 ') which can slide in slides (31, 31') provided in the internal wall (18).

  As in the previous variant, this wall (18) has notches (19, 19 ') provided to accommodate this time the tabs (32, 32') which protrude towards the bottom of the disc (15). As indicated above, the width of these legs (32, 32 ') is less than the width of the notches (19, 19'), so as to absorb, for example, an angular clearance around a passing axis of rotation by said legs (32, 32 ') and

  perpendicular to the primary axis of rotation.

  A spring (33) is interposed between the pusher (29) and the bottom of the rotor (8). This is provided with orifices allowing the passage of the tabs (30, 30 '), 30 in order to carry out switching operations, by axial pushes on the button

  (1), microswitches placed on the printed circuit (10).

  The metal part (27) provided with curved tongues (28, 28 ') itself has two orifices (34, 34') for the passage of the legs (30, ').

  The operation is deduced in particular from FIG. 9.

  The shaft (8) rests on the pusher (29) via its free hemispherical end (40). This geometrical particularity of the end of the shaft (8) makes it possible to carry out rotations around secondary axes of the disc (15), which is guided for this purpose between the domes (35, 36) projecting respectively from the wall ( 2) fundamental and

platinum (7).

  To reduce the friction forces, the guidance is more specifically between on the one hand an annular bead (37) projecting from the inner wall of the dome (35), and in contact with which the ribs (16) of the disc (15) slide. ), and on the other hand an annular bead (38) projecting from a dome recess (39) formed in the bottom of the disc, and which is at

  contact of the dome (36) of the plate (7).

  When the user exerts an axial force on the button (1), the pusher (29), guided in the wall (18) of the rotor (8) exerts a downward action counteracted by the spring (33), until so that the free ends of the legs (30, 30 ') can exert their electrical switching action in cooperation with the printed circuit (10). As soon as the stress stops, the spring (33) recalls the shaft (8) and the pusher (29) in the initial position of

1 5 rest.

  Rotary and actuation functions according to secondary axes

  are identical to those described for the first variant.

  The controller described above is of course only one possible example of this invention. This includes other variations of shapes and configurations which are within the reach of ordinary skill in the art. 1 3

Claims (28)

  1. Control member provided with a rotary manipulation button around a first axis and which can be at least rotated around 5 at least one secondary axis contained in a plane perpendicular to the first axis, by elastic support on at least one location located in the vicinity of the periphery of the manipulation button, and of an electrical circuit provided with components able to switch according to the stresses applied to the button, characterized in that the latter is secured to an actuator which transmits the movement of manipulation which is printed on said components, which are arranged on one side of an electrical circuit support oriented opposite said button, transmission effected via at least two parts forming an interface between said actuator and said circuit, firstly a rotor integral in rotation with the actuator according to the first   axis, the mechanical connection between them being provided to allow relative displacements along the secondary axis (s), and on the other hand a plate comprising elastic means of connection with the electric circuit, which are arranged substantially in line with the peripheral locations 20 d 'support.   2. Control unit according to the preceding claim,   characterized in that the support of the electrical circuit is a printed circuit.   3. Control member according to one of the preceding claims,   characterized in that the fixed plate takes the form of a thin plate 25 which protrude studs parallel to the first axis, in number corresponding to the number of peripheral support locations, said studs protruding by at least one side of the plate and being arranged at the free end of at least one flexible tab for each support location in the plate, the tab or tabs being made of an elastic material allowing them to return to position   rest after action on the studs.   4. Control member according to the preceding claim, characterized in that the flexible tongues are two in number   superimposed for each support location.   5. Control member according to one of claims 3 and 4,   characterized in that the plate comprises means for guiding the actuator towards the studs.   6. Control member according to one of claims 3 to 5,   characterized in that the plate comprises, in its central zone, a complex orifice formed by a number of converging radial slots at most equal to the number of studs / tongues arranged on the periphery, and developing towards them.   7. Control member according to the preceding claim, characterized in that the number of radial slots is equal to the number of pads, and in that said slots develop in the direction of said pads.   8. Control member according to any one of claims   above, characterized in that it includes means for indexing the rotational position of the rotor.   9. Control member according to the preceding claim, characterized in that the plate comprises on one side, on the immediate periphery of the ends of said slots, a crown with reliefs and   depressions, cooperating with a protruding protrusion of the rotor.   10. Control member according to claim 8, characterized in that the rotor comprises a crown with reliefs and depressions, cooperating with an elastic finger disposed fixed relative to the frame of the control member.   1 1. control member according to any one of claims   above, characterized in that the rotor has a central housing 20 delimited by a cylindrical wall arranged on a base consisting of a flat plate.   12. Control member according to one of claims 7 to 11,   characterized in that the actuator comprises a central shaft arranged along the first axis of rotation, of dimensions provided so that it can be guided in the slots made in the plate, and comprising a perpendicular disc whose radius is such that it can, when the connecting element is manipulated along a secondary axis, exert an action on the peripheral stud (s) of said plate, on which it rests in the absence of such manipulation.   13. Control member according to the preceding claim, characterized in that the central shaft and the disc are integral with one another.   14. Control member according to one of claims 11 and 12,   characterized in that an end portion of the central shaft adjusts with a radial clearance in the central housing of the rotor, said portion being limited by a flange forming an axial stop in contact with the wall, the radial clearance allowing a angular displacement of the shaft relative to the secondary axes, means being further provided for joining them in   rotation relative to the first axis.   1 5 15. control member according to the preceding claim, characterized in that the wall is cylindrical and the end portion of the connecting element comprises at least one radial lug which can be inserted in a notch formed in said wall so to join them in rotation. 16. Control member according to the preceding claim, characterized in that said end portion comprises two opposite radial lugs fitting into two diametrically opposite notches of the low wall.   17. Control member according to claim 12, characterized in that   the central shaft and the disc are integral in rotation and free in translation.   18. Control unit according to the preceding claim,   characterized in that the disc is guided, during the rotations around the secondary axes, between the plate and a table separating the button from the other 15 elements of the control member, and crossed by the central shaft.   19. Control member according to the preceding claim, characterized in that the table surmounted by the button and the plate each comprise a dome whose apex is pierced for the passage of the central shaft, said domes being coaxial and forming a space in 20 which is guided the disc, equipped on the one hand with radial ribs with a rounded end on its face opposite said table, and on the other hand with a dome recess on the other face, said rounded ends and said recess having curvatures corresponding respectively to that of their dome opposite.   20. Control member according to the preceding claim, characterized in that the dome of the wall surmounted by the button and the dome recess of the disc comprise, at their base, an annular relief having an outer surface whose shape and provided for s 'adapt   respectively to the rounding of the ribs and to the dome of the plate.   21. Control member according to any one of claims   17 to 20, characterized in that the central shaft has grooves which fit in axial slides of an axial conduit passing through the disc, in order to block them in rotation and allow guiding in translation, said conduit comprising a stop limiting translation in the direction of the button.   22. Control member according to the preceding claim, characterized in that the disc has two tabs oriented parallel to the guide hole of the central shaft, and housed in notches made in the wall of the rotor for securing in rotation, the respective dimensions of the legs and notches allowing   angular movement around the secondary axes of rotation.   23. Control member according to one of claims 17 to 22,   characterized in that the free end of the central shaft rests on a push 5 guided in translation inside the internal wall of the rotor, and comprising at least one tab capable of crossing the base of the rotor to actuate at least a switch, the rotor comprising at least one orifice for this purpose, a spring being provided to return said pusher and the central shaft to the position of non-actuation of the switch or switches in the absence of axial stress on the button.   24. Control member according to the preceding claim, characterized in that the pusher has a surface substantially perpendicular to the axis of the central shaft and two lateral tabs guided in slides made in the inner wall of the wall so that said pusher can be inserted into said wall by action of the central shaft, the spring being interposed between said circular surface and the base of the rotor.   25. Control member according to one of claims 17 to 24,   characterized in that the free end of the central shaft is hemispherical. 26. Control unit according to one of claims 11 to 25,   characterized in that a second coaxial wall of cylindrical appearance surmounted by a boss cooperating with the indexing ring of the plate is   also secured to the base of the rotor.   27. Control member according to the preceding claim, characterized in that the base of the rotor comprises, associated with its face opposite to that which presents the walls, means for cooperating with components, contacts or tracks of the electrical circuit aimed at producing at least one switching during the rotation along the first axis, and   allowing the passage of at least one tab of the pusher.   28. Control member according to the preceding claim, characterized in that said means consist of a conductive plate comprising at least one conductive member projecting from the plane of the plate, capable of sliding at least temporarily on tracks of the circuit   electric to switch the state of at least one contact of said circuit.   29. Control unit according to any one of the claims   3 to 28, characterized in that the electrical circuit includes   switches arranged under the pads of the plate.   30. Control unit according to any one of the claims   above, characterized in that the electrical circuit includes means for magnetic detection of the movements of the   control, for example based on Hall effect sensors.   31. Control unit according to any one of the claims   above, characterized in that the electrical circuit includes means 5 for optical detection of movements of the control member.   32. Control unit according to any one of the claims   12 to 31, characterized in that the electrical circuit comprises a light-emitting diode disposed in the axis of the central shaft of the actuator, which is made of a material which conducts the light emitted by the diode 10 towards the manipulation button.