Multidirectional ergonomic control unit

1. A multidirectional control unit comprising:

a lower body of main axis A;

an intermediate part which is mounted to move relative to the body in a radial plane;

a radial displacement guidance means for the intermediate part, which cooperates with a first bottom radial face of the intermediate part and a second top radial face of the body;

a handle of secondary axis B, which is supported by the intermediate part and which is linked to the intermediate part in radial displacement, between a neutral central position in which the secondary axis of the handle extends roughly coaxially with the main axis of the body, and a plurality of radial actuation positions, in each of which the secondary axis B of the handle and the main axis A of the body are parallel and radially offset from each other, the handle being mounted to slide axially on the secondary axis B, between a top idle axial position towards which the handle is elastically returned and a bottom active axial position;

at least one electrical switch which is able to change state when the handle is displaced towards its bottom active axial position;

an elastically deformable bar which extends axially from the body, which comprises a top head cooperating with the handle, and which supports at least one strain gauge, such that the bar is able to bend when the handle is driven in radial displacement for said at least one gauge to produce an electrical signal representative of said radial displacement of the handle,

wherein the handle is mounted to rotate freely, about the secondary axis B, relative to the body of the multidirectional control unit.

2. The multidirectional control unit of claim 1 , wherein the handle is linked to rotate with the intermediate part, and in that the radial displacement guidance means of the intermediate part are able to guide the handle in rotation, about the secondary axis B.

3. The multidirectional control unit of claim 1 , wherein the radial displacement guidance means comprises at least one first set of balls, of which each ball is axially inserted between the first bottom radial face of the intermediate part and the second top radial face of the body.

4. The multidirectional control unit of claim 3 , wherein the radial displacement guidance means comprises a first circular cage in which the balls of the first set are fitted to rotate and distributed angularly about the secondary axis B of the handle.

5. The multidirectional control unit of claim 1 , further comprising a means of returning the guidance means to a centered position, on the secondary axis B of the handle.

6. The multidirectional control unit of claim 1 , wherein the intermediate part comprises an annular radial plate which is axially delimited by said first bottom radial face of the intermediate part and by a third top radial face, and in that the radial displacement guidance means comprises a second set of balls, each ball being axially inserted between said third top radial face of the intermediate part and a fourth bottom radial face of the body.

7. The multidirectional control unit of claim 1 , wherein the body further comprises an internal concave cylindrical axial end-stop wall which is arranged facing a convex cylindrical axial wall of the intermediate part, so as to limit the radial displacement of the handle relative to the body.

8. The multidirectional control unit of claim 1 , characterized in that the switch is supported by the body of the multidirectional control unit.

9. The multidirectional control unit of claim 1 , wherein the head of the bar is received by sliding axially into a cylindrical housing which extends axially on the secondary axis B of the handle.