Approaching and retaining device, in particular for a boat door

Approaching and retaining device, in particular for a boat door, of the type comprising a fixed assembly adapted to be associated with a frame, and a mobile assembly adapted to be associated with a wing, said fixed assembly comprising:

• a nib which can slide freely in a first through hole of a main body of said mobile assembly;
• activation means for automatically operating an actuator connected to the nib in a manner such that, as the wing approaches the frame, the automatic movement of the nib and the interaction of the nib with the mobile assembly determine an approaching movement of the wing towards the frame and a compression force against an elastic element positioned between the frame and the wing, characterized in that said mobile assembly comprises:
• an external element rigidly secured to the wing;
• an internal strike adapted to be inserted into a second through hole of the main body, said internal strike including a transversal hole adapted to house the nib;
• a threaded pin which allows the internal strike to move relative to the external element.