Actuation apparatus and actuation method

An actuation apparatus, comprising:

• a support seat;
• a swing arm mounted on the support seat and rotatable about a swing axis, wherein the swing arm is provided with at least one first force-bearing portion, an execution portion, and a braking portion;
• and a distance from the at least one first force-bearing portion to the swing axis is shorter than a distance from the execution portion to the swing axis;
• a braking arm movably mounted on the support seat;
• an elastic member clamped between the support seat and the braking arm and configured to drive the braking arm to stop against the braking portion;
• at least one first shape memory alloy line disposed on the support seat, wherein when powered on and working, the at least one first shape memory alloy line is able to drive the at least one first force-bearing portion to rotate around the swing axis;
• and
• a second shape memory alloy line disposed on the support seat, wherein when powered on and working, the second shape memory alloy line is able to drive the braking arm away from the braking portion.