Shape memory haptic actuator device

A method of manufacturing a haptic actuator, the method comprising:

• providing a slider having a first plurality of interlocking sliding features and a first engagement surface;
• providing a base having a second plurality of interlocking sliding features and a second engagement surface, the second plurality of interlocking sliding features configured to engage with the first plurality of interlocking sliding features;
• disposing a shape memory alloy between the first engagement surface and the second engagement surface;
• disposing a pair of ohmic contacts;
• and
• securing the shape memory alloy to the pair of ohmic contacts,
• wherein the shape memory alloy contracts and causes displacement of the slider relative to the base from a first position to a second position in response to a current applied to the shape memory alloy through the pair of ohmic contacts.

A haptic actuator comprising:

• a slider having a first plurality of interlocking sliding features and a first engagement surface;
• a base having a second plurality of interlocking sliding features and a second engagement surface, the second plurality of interlocking sliding features configured to engage with the first plurality of interlocking sliding features, wherein the first plurality of interlocking sliding features extends toward the second engagement surface and the second plurality of interlocking sliding features extends toward the first engagement surface;
• a shape memory alloy located between the first engagement surface and the second engagement surface;
• a pair of ohmic contacts in direct contact with the shape memory alloy and configured to apply a current to the shape memory allow and cause displacement of the slider relative to the base from a first position to a second position;
• and
• a spring element configured to engage with the base and the slider and provide a return force biasing the slider relative to the base toward the first position.