US Patent 10345910 Haptic actuator assembly with a spring pre-load device

A haptic actuator assembly includes a haptic actuator configured to output displacement along a perpendicular axis and a pre-load device. The pre-load device is disposed adjacent to the haptic actuator and configured to generate a compressive load on the haptic actuator along the perpendicular axis to oppose expansion of the haptic actuator along the perpendicular axis. The pre-load device includes a casing and at least a first spring component. The casing includes a cover and a base spaced apart from and extending parallel to the cover. The haptic actuator is disposed between the cover and the base, and the first spring component is configured to exert a force in order to create the compressive load on the haptic actuator along the perpendicular axis.