Apparatus for generating a haptic signal

Device for generating a haptic signal, comprising

• a single haptic module comprising a single actuator,
• a base plate and a cover plate which are arranged parallel to one another, the cover plate having an abutment surface facing towards the base plate and a top side facing away from the base plate,
• the haptic module being arranged between the base plate and the cover plate, a first partial area of the haptic module abutting the abutment surface of the cover plate and a second partial area of the haptic module abutting the base plate, and
• a spring-loaded suspension via which the base plate and the cover plate are mechanically connected to one another,
• wherein the spring-loaded suspension is designed such that the abutment surface is moved towards the base plate when the cover plate is in a neutral position and a force is exerted in the direction of the base plate on any point of the top side of the cover plate, so that a compressive force is always transmitted to the haptic module when a force is exerted in the direction of the base plate on any point of the top side of the cover plate,
• wherein the spring-loaded suspension comprises a first spring element allowing movement of the cover plate relative to the base plate, and
• wherein the spring-loaded suspension comprises a guide element preventing movement of the cover plate from the neutral position in a direction away from the base plate or
• which impedes a movement of the cover plate out of the neutral position in a direction away from the base plate compared to a movement of the cover plate out of the neutral position towards the base plate,
• wherein the haptic module comprises as the actuator a piezoelectric actuator having a top side and a bottom side, and wherein the haptic module further comprises
• a first mechanical amplification element which is arranged on the top side of the piezoelectric actuator and which comprises the first partial area, and
• a second mechanical amplification element which is arranged on the bottom side of the piezoelectric actuator and which comprises the second partial area,
• wherein the first mechanical amplification element and the second mechanical amplification element are configured and arranged in such a manner that a change in length of the piezoelectric actuator in a direction parallel to the top side of the piezoelectric actuator is converted into a movement of the first partial area perpendicular to the top side of the piezoelectric actuator and a movement of the second partial area in a direction opposite to the direction in which the first partial area moves.