Locking device for a ski boot

A locking device for locking a rotary articulation between a lower shell and a cuff of a ski boot, comprising:

• an immobilizing element movable in translation between an immobilizing position and a release position,
• a blade comprising a stop surface intended to interact with the immobilizing element so as to lock the rotary articulation when the immobilizing element is in the immobilizing position,
• a lever intended to be manipulated by a user, the lever being movable between a locking position and an unlocking position,
• a toggle mounted rotatably about a first axis of rotation, the toggle comprising a first bearing surface and a second bearing surface opposite the first bearing surface with respect to the first axis of rotation,
• the lever being configured to exert a thrust against the first bearing surface so as to cause the toggle to pivot about the first axis of rotation,
• the second bearing surface being configured to exert a thrust against the immobilizing element so as to move the immobilizing element between the immobilizing position and the release position.