Smartfold electronic actuation
View Patent ↗An electronic trigger assembly for triggering an actuator, the electronic trigger assembly having a trigger member capable of connection to the actuator. The trigger member may be configured for rotation between a first position and a second position and the trigger member may be able to trigger the actuator as the trigger member rotates between the first position and the second position. The trigger member may also include a guide. A shape memory alloy member may be connected to the trigger member and may be received by the guide such that a substantial portion of the shape memory alloy member is disposed in a curvilinear arrangement. The shape memory alloy member may contract when electrified. The shape memory alloy member may be confined by the guide to contract along a path such that the shape memory alloy member exerts torque on the trigger member and causes the trigger member to rotate from the first position to the second position.
1. An actuator assembly comprising:
a release mechanism having a slot;
a reference plate having a protrusion that extends through the slot; and
a shape memory alloy member disposed proximate the release mechanism and extending at least partially around the protrusion;
wherein the shape memory alloy member engages and exerts a force against the protrusion to cause the protrusion to move within the slot and rotate the release mechanism when a sufficient electrical charge is provided.
2. The actuator assembly of claim 1 wherein the shape memory alloy member is disposed in a groove in the release mechanism.
3. The actuator assembly of claim 2 wherein at least a portion of the release mechanism is made from a material that is substantially non electrically conductive.
4. The actuator assembly of claim 2 wherein an arc of contraction of the shape memory alloy member is at least partially defined by the groove.
5. The actuator assembly of claim 4 wherein the groove defines an arc.
6. The actuator assembly of claim 1 further comprising an electrically conductive pin connected to the release mechanism wherein the shape memory alloy member is connected to the pin and wherein the shape memory alloy member exerts torque on the release mechanism through the pin.
7. The actuator assembly of claim 6 further comprising a circuit plate connected to the pin, the circuit plate being configured for connection to a power supply, the circuit plate being further configured to transmit an electric current from the power supply to the pin.
8. The actuator assembly of claim 7 further comprising a wire assembly connected to the circuit plate, the wire assembly being configured for connection to the power supply and the wire assembly having slack when connected to the power supply.
9. The actuator assembly of claim 1 wherein the shape memory alloy member is made from a material comprising nickel titanium.
10. The actuator assembly of claim 1 further comprising a trigger member connected to the release mechanism wherein the shape memory alloy member is connected to the trigger member, wherein the contraction of the shape memory alloy member exerts a torque on the trigger member and wherein the trigger member transmits the torque to the release mechanism.