Mechanical actuation unit of lock for a door of a motor vehicle, and lock provided with said mechanical actuation unit

摘要

A mechanical actuation unit (1) of a lock (2) for a door of a motor vehicle is provided with an opening mechanism (33)controlled to release an internal mechanism (62), which is designed to be connected to the inside handle of the door and is rotatable starting from a position at rest along an opening travel path against the elastic action of a return spring (71), to control the opening mechanism (33) and open the door; the mechanical actuation unit (1) is also provided with a principal inhibiting device (73), which can be activated selectively to make opening of the door from the outside ineffective; the return spring (71) of the internal control lever (62) has a first and a second stop portion (98), which are designed respectively to deactivate the principal inhibiting device (73) following rotation of the inside control lever (62) and to obstruct activation of the principal inhibiting device (73) when the door is open.