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 adapted to be applied to a container tube of the dispenser, said fixed head comprising a dispensing duct provided with an opening for dispensing a product and with an initial section extending along a main axis;
• a pump comprising an elastically deformable cap guided under deformation along said main axis;
• an actuator movably supported by the fixed head and adapted to be manually operated to deform at least partially the pump and achieve dispensing of the product;
• a separating wall cooperating with the pump, adapted to delimit at least partially a main chamber with the elastically deformable cap and to separate said main chamber from a tube compartment of the dispenser, wherein said separating wall comprises a suction inlet adapted to put the tube compartment in communication with the main chamber, lying on an imaginary plane orthogonal to the main axis;
• and
• a suction valve adapted to allow the product to pass from the tube compartment to the main chamber during a product suction step and to prevent the product from returning from the main chamber to the tube compartment during a product dispensing step;
• wherein said suction valve comprises a valve body that cooperates with the suction inlet and comprises a plurality of tabs which, in the product suction step, flex and open the suction inlet and, in the product dispensing step, close the suction inlet,
• ein the valve body further comprises an annular support, supported by the separating wall, and a plurality of hinge portions, wherein each hinge portion of said plurality of hinge portions, being elastically deformable, joins at least one tab of the plurality of tabs to the annular support, and
• ein by said hinge portions, each tab of the plurality of tabs is arranged in a cantilever manner inside the annular support, spaced apart from said annular support to form an annular gap therewith, except at said hinge portions.