Coupling end piece for a control cable from a gearbox to a ball joint

1. A connector end piece of a control cable from a vehicle transmission to a ball joint of a part of a gearshift or of a part of the vehicle transmission, where the connector end piece is intended to go over the control cable and includes a radial window able to receive, by engagement, a cover having an inner threaded portion and a bore, where the cover is movable in a radial direction from a disengaged position to an engaged position in which it the cover engages with a threaded end portion of the control cable and locks said control cable in position, wherein the connector end piece comprises an end annular portion, coaxial with the control cable, the end annular portion having a locked groove and an unlocked groove, the end annular portion receiving a security ring, said security ring having a body, a pin, and at least one elastic tab; the at least one elastic tab engageable, with axial sliding movement of the security ring, in at least one of the locked groove and the unlocked groove, the body having an axial end proximate the connector end piece, the pin extending axially towards the connector end piece from the axial end of the security ring, wherein the security ring is movable from an unlocked position to a locked position in which:

when the cover is in the disengaged position, the pin of the security ring extends into the bore of the cover and holds the cover in the disengaged position and prevents the cover from moving into the engaged position; and

when the cover is in the engaged position, the pin of the security ring extends over a portion of the cover and holds the cover in the engaged position and prevents the cover from moving into the disengaged position.

2. The coupling end piece according to claim 1 wherein axial sliding movement of the security ring engages the at least one elastic tab in:

the locked groove to lock the security ring in the locked position; or

the unlocked groove to lock the security ring in the unlocked position.

3. The coupling end piece according to claim 2 , wherein the disengagement of the at least one elastic tab is done by transverse pressure on the security ring.

4. The coupling end piece according to claim 2 , wherein, when the security ring is in the locked position, the pin is intended to come either:

to be interposed between the cover and the radial window and within the bore, for preventing the cover from engaging with the threaded end portion of the control cable;

to be positioned overtop the portion of the cover for preventing the cover from disengaging from the threaded end portion of the control cable.

5. The coupling end piece according to claim 1 , wherein the at least one elastic tab is formed on a radially inward-facing surface of the pin, and the locked groove and the unlocked groove are formed as radial grooves axially spaced apart from one another on the end annular portion; and wherein the at least one elastic tab is disengageable from the locked groove or the unlocked groove by application of a radial force to a circumference of the security ring.

6. The coupling end piece according to claim 5 , wherein in the unlocked position, the security ring is coaxial with the end annular portion and the security ring is retained on the end annular portion by the unlocked groove; and in the locked position, the security ring is coaxial with the end annular portion and the security ring is retained on the end annular portion by the unlocked groove.