Releasable lock for a motor vehicle lock mechanism

A releasable latch, for a motor vehicle lock mechanism, comprising:

• a fixed stator having an assembly of at least two distinct semicylindrical portions, wherein the fixed stator comprises a guidance and abutment contact block on an inner face thereof;
• a rotor rotatably mounted in the fixed stator, the rotor being sandwiched by the two semicylindrical portions and comprising a plurality of tumblers configured to be moved radially under an action of a key that is designed to be inserted axially into the rotor;
• an intermediate tubular socket configured to rotate about an axis thereof in the fixed stator and to move axially relative to the fixed stator;
• and
• an indexer configured to be axially moved between a rest position and a released position, the indexer comprising two tongues configured to fit into a cam and to be connected in rotation to the cam;
• wherein, in the released position, the indexer is configured to butt against the guidance and abutment contact block thereby immobilizing the indexer,
• wherein the rotor is directly coupled with a control lever that acts as the cam when the key is suitable,
• wherein the rotor is uncoupled from the control lever in a released position
• wherein the rotor is fixed axially in the intermediate socket,
• wherein the rotor and the intermediate socket are prevented from rotating relative to one another by the plurality of tumblers when the key is unsuitable, and
• wherein, under an effect of a rotation of the intermediate socket relative to the fixed stator following the rotation of the rotor with the unsuitable key, the indexer is immobilized and blocks the rotation of the cam by means of the two tongues.