| 摘要 |
A microgripper (2) comprises a pair of opposed actuator devices (4, 6) connected to an electronic control unit (8) . Each actuator (4, 6) includes an actuator body 10 of transparent flexible epoxy based photoresist material forming a "hot" arm (12) and a "cold" arm (14) joined together at their ends, and an electrical heating element wire (18) is embedded in the "hot" arm (12) . A gripper arm (32) extends from the substrate and has a gripping portion (34) such that the gripper portions of the two gripper arms (32) face each other. When electrical current is supplied to the heating element (18) , electrical heating of the "hot" arm (12) occurs, as a result of which thermal expansion of the "hot" arm (12) causes its length to become greater than that of the "cold" arm (14) . Because the "hot" and "cold" arms (12, 14) are joined together at their ends, the increased length of the "hot" arm (12) as a result of its thermal expansion causes the actuator bodies (10) to flex, as a result of which the gripper portions (34) of the gripper arms (32) move closer together. |
