Liquid diffuser device for irrigation systems

A liquid diffuser device for irrigation systems, comprising:

• a frame defining a central axis and having an upper body provided with a nozzle connected to a line for supplying an irrigation liquid to generate a substantially axial jet, and a lower body provided with a stabilizing mass;
• a deflector assembly having a deflector plate with an upper face facing said nozzle and a lower face, from which a shank extends from a side opposite to said nozzle;
• and
• a containment member operatively associated with said lower body and having a peripheral annular collar, a stem, and a cavity with a bottom wall, on which there is arranged a rotatable support,
• wherein said deflector assembly is inserted into the cavity of said containment member with an end of said shank resting against said rotatable support and with said lower face of said deflector plate spaced apart from said annular collar to allow a free rotation of said deflector assembly,
• further comprising a protection member joined to said deflector plate and configured to occlude a space between a lower face of said deflector plate and said annular collar of said containment member, and to enclose said containment member and said rotatable support to prevent an entry of foreign liquids, solids and debris and ensure a nutation motion of said deflector assembly;
• wherein said lower face of said deflector plate has a first annular formation configured to define a connection element with an enlarged portion of said shank
• wherein said lower face of said deflector plate has a second substantially cylindrical annular formation radially offset with respect to the first annular formation, said protection member having a substantially frustoconical shape with a substantially cylindrical upper edge for coupling by snap-coupling means to said second annular formation of said deflector plate.