Locking/release device

A locking/release device particularly for pushchairs, prams or the like, comprising an actuation lever system that supports engagement means and is articulated to a supporting structure that is movable with respect to a locking element, which has at least one abutment region and at least one engagement seat, said actuation lever system being mounted rotatable about a pivoting axis in order to pass from a release position, in which said engagement means are disengaged from said abutment portion, to a locking position of said locking element, in which said engagement means engage said at least one engagement seat, at least one abutment position being further provided in which said engagement means abut against at least one portion of said at least one abutment region, further comprising elastic loading means that act between a first coupling portion, which is supported by said supporting structure, and said actuation lever system and are adapted to generate a thrust that acts along an axis of action that can rotate about said coupling portion, said action axis intersecting said pivoting axis in an intermediate position between said abutment position and said release position.