Trigger-type dispensing head for a dispensing device for pasty products such as toothpastes

A manually operable head assembly for a dispenser for pasty products, comprising:

• a fixed head suitable for being applied to a container tube of the dispenser, said fixed head being provided at a front of the head assembly with a dispensing duct comprising an opening for dispensing a product and provided with an initial segment extending along a main axis, wherein the fixed head comprises an annular wall, positioned at a back of the head assembly, axially ending with an upper edge;
• a pumping unit comprising an elastically deformable cap guided under deformation along said main axis;
• an actuator movably supported by the fixed head and suitable for being manually operated to deform at least partially the pumping unit and achieve dispensing of the product;
• a guarantee tab made in one piece with the actuator and mechanically engaged to the fixed head, wherein the guarantee tab comprises a tab body and at least one bridge for connection with the actuator, the at least one bridge being breakable on a first operation of the actuator, wherein the tab body is configured to remain mechanically engaged to the fixed head following the first operation of the actuator, wherein the tab body comprises an outer wall and an inner wall radially spaced, and an upper wall joining the outer wall and the inner wall, forming an inverted U-shaped section on an imaginary plane containing the main axis, wherein the tab body is engaged to the upper edge of the annular wall, and wherein the upper edge is positioned radially between the outer wall and the inner wall of the tab body.