Head for brush cutters

A head (1) for brush cutter for cutting grass and herbaceous plants, the head comprising:

• a plurality of cutting elements (2) and each having a front cutting portion (21), defined by an elongated section (22), and a rear hooking portion (23), connectable to the head (1) due to a slotted section (24);
• a support body (3), engageable with a drive shaft of a brush cutter to rotate around an axis of symmetry (Y) of the support body (3), having a central portion (31), connectable to the drive shaft, and a peripheral portion (32), having a substantially disc-shaped conformation extending from the central portion (31) radially around it;
• a plurality of pins (4), engageable by the plurality of cutting elements (2) through the insertion of the slotted section (24) of a respective cutting element (2) on a corresponding pin (4), radially distributed on the peripheral portion (32);
• each pin (4) having at least one outer surface (41) having a first side (411) facing the central portion (31);
• a plurality of keys (5) connected to the central portion (31) of the support body (3);
• each key (5) being engageable in contact with a respective pin (4) and movable, under the activation by an operator, from a first position, in which the key (5) is in contact with the side (411) of the pin (4) to which the key (5) is facing, to a second position, in which the key (5) is spaced apart from the side (411) generating a passage opening adapted to allow the engagement of the cutting element (2) on the pin (4) due to the insertion of the slotted section (24) on the pin (4);
• a plurality of elastic means (6), active on the plurality of keys (5) and adapted to return the plurality of keys (5) from the second position to the first position once the action induced by the operator has ceased,
• wherein each key (5) is defined by a prismatic body (50) having a bottom wall (51) which is spaced apart from the peripheral portion (32);
• said rear hooking portion (23) being retained, when the key (5) is in the first position, between the bottom wall (51) and the peripheral portion (32).