Actuator device

An actuator device, comprising:

• a main body with a base body and buildup body which extends from the base body in a thickness direction,
• a plurality of actuators forming the buildup body, wherein each of the actuators extends in a depth direction and is formed of an actuator body which is made of a piezoelectric or electrostrictive material and comprises actuation electrodes which are disposed at or in the actuator and which are distanced from each other, wherein the actuators are arranged behind each other in the longitudinal direction of the actuator device, wherein an actuation area segment of a recess is formed between each of two neighboring actuators,
• wherein the actuators comprise electroconductive actuator connection coatings which are electrically connected to the actuation electrodes of the actuators, wherein the actuator connection coatings, at least in sections, are disposed:
• (i) either on a surface of the base body which is oriented in the thickness direction,
• (ii) or on an actuator step section of the actuators, wherein the actuator step section joins, in a depth direction, a respective actuator body of the actuators,
• wherein between actuator connection coatings of respective two neighboring actuators a respective connection area segment of a respective recess is disposed,
• a printed circuit board which extends in the longitudinal direction of the actuator device over at least sections of the actuator connection coatings, wherein the conductive paths of the printed circuit board are in electrical contact with the actuator connection coatings,
• wherein in the connection area segment of the respective recess, at least in sections, a connection layer is disposed which is made of a resin reinforcement material, wherein the connection layer, at least in sections, contacts side surfaces which delimit the respective connection area segment and which are opposed to each other, the surface section of the base body, which is oriented in the thickness direction, and the area of the printed circuit board which faces the surface section of the base body, in order to support the printed circuit board in the area of the respective connection area segments of the respective recess and to fix the printed circuit board to the actuator connection coatings.