Karabiner with locking ring

1. A karabiner comprising a fixed C-shaped body having a first end shaped as a securing part and a second end for articulation of a gate movable around a pivoting spindle between a closed position and an open position, said gate comprising:

a latching part situated opposite the pivoting spindle to operate in conjunction with the securing part in the closed position,

a return spring to return the gate to the closed position,

a locking ring fitted coaxially around the gate and having a shorter length than that of the gate, said ring being movable between a first locked position blocking the gate in the closed position and a second unlocked position enabling the gate to be moved to the open position, and

a lock-bolt able to block the ring positively in said first locked position, wherein the lock-bolt is placed on the movable gate and the locking ring is slidingly mounted on the gate between the first and second positions, said ring comprising a hole for receiving the lock-bolt at the end of the translational travel to the first locked position to constitute both a mechanical blocking device of the ring and a first visual indicator indicating the locked state, and wherein the lock-bolt comprises a telescopic pin fitted in a hole of the gate with a compression spring fitted therebetween, the pin having a colored surface to form said first visual indicator in the locked state.

2. The karabiner according to claim 1 , wherein the lock-bolt is placed on one of the side faces of the movable gate, being angularly offset with respect to the latching part.

3. The karabiner according to claim 1 , wherein the locking ring is made of metal.

4. The karabiner according to claim 1 , wherein the locking ring is made of plastic.

5. The karabiner according to claim 1 , wherein the periphery of the gate at the level of the latching part comprises a second visual indicator visible in the unlocked state of the ring and invisible in the locked state.