Actuating device, particularly for ink-jet printheads, with electromagnetic isolation
An actuator device, particularly for ink-jet heads, comprising: two or more electromagnetic actuators or solenoids (S), each comprising a ferromagnetic core ( 2 ), and a conductive winding or coil ( 4 ), arranged concentrically to the ferromagnetic core ( 2 ); a containment body ( 5 ), which encloses the electromagnetic actuators (S); an insulator element ( 1 ) for each solenoid (S). Each insulator element ( 1 ) is made of a magnetic material and is disposed at least partially in proximity of a respective solenoid (S).
1. An actuating device, particularly for ink-jet printheads, comprising:
two or more solenoids (S), each comprising a coil ( 4 ) and a ferromagnetic core ( 2 ) which is inserted concentrically within the coil ( 4 );
a containment body ( 5 ), for containing the solenoids (S);
an insulator element ( 1 ) for each solenoid (S); each insulator element ( 1 ) is made of a magnetic material and extends at least partially in proximity of a corresponding solenoid (S);
wherein each insulator element ( 1 ) comprises two longitudinal portions ( 11 ) parallel and opposed one to another;
wherein each solenoid (S) is placed within the space between the longitudinal portions ( 11 ) of the respective insulator element ( 1 ); and
wherein the longitudinal portions ( 11 ) are arranged at a pre-determined distance from the corresponding solenoid (S).
2. An actuating device according to claim 1 , wherein the containment body ( 5 ) is provided with at least one cooling conduit ( 6 ).
3. An actuating device according to claim 2 , wherein the cooling conduit ( 6 ) is formed on an outer lateral surface of the containment body ( 5 ) and is delimited at least partially by an outer cover ( 7 ).
4. An actuating device according to claim 3 , wherein each insulator element ( 1 ) is arranged outside the outer cover ( 7 ).
5. An actuating device according to claim 1 , wherein the containment body ( 5 ) is provided with at least one cooling conduit ( 6 ) that laps the solenoids (S).