Key with stowable insert and corresponding extension module

A key for a motor vehicle, comprising:

• a casing with an upper half shell forming a lid and a lower half shell forming the casing bottom;
• an insert mounted to pivot with respect to said casing between a rest position in which the insert is retracted or stowed in said casing and a position of use in which the insert is deployed out of said casing;
• a mechanism for deploying the insert which is mounted in said casing, wherein the mechanism comprises:
• push button housed axially in an associated housing of the upper half shell and projecting with respect to the upper half shell to be actuated by a user, and
• an elastic return element for returning the insert, a first end of which is connected to the insert to urge the insert to pivot toward said position of use when the push button is actuated;
• wherein the push button comprises a means for blocking the rotation of the push button with respect to said casing that forms a guide for the push button in axial translation, and wherein said elastic return element is fixed to the push button by a second end;
• wherein said guide forming blocking means comprises at least one guide lug that guides the push button and collaborates with a corresponding slot of said housing of said upper half shell;
• wherein the insert comprises a key bit and a key bit support secured to the key bit mounted so that the key bit support pivots with respect to said casing;
• wherein the first end of said elastic return element is fixed to the key bit support so that said elastic return element urges said support to pivot with respect to said casing in order to deploy the key bit when the push button is actuated;
• further comprising a means of halting the translational movement of the push button which is situated at least partially in said key bit support;
• wherein said halting means comprises a stop post formed out of the lower half shell and which enters a cavity provided in said key bit support.

An insert deployment module for a key with retractable insert configured to be mounted in a casing of said key, comprising:

• an insert with a key bit support and a key bit secured to said support;
• a push button housed in an orifice of said key bit support,
• wherein the push button comprises a means for blocking the rotation of the push button with respect to said casing that forms a guide for the push button in axial translation, and wherein said elastic return element is fixed to the push button by a second end, and
• wherein said guide forming blocking means comprises at least one guide lug that guides the push button and collaborates with a corresponding slot of said casing;
• and
• an elastic return element for returning the insert,
• wherein said return element is fixed, on the one hand, to said key bit support and, on the other hand, to the push button,
• wherein said guide forming blocking means enables said push button to be non-rotatable with respect to said casing.