| 摘要 |
PURPOSE:To attain an easy assemble work at a low cost and certainly hold a shape memory alloy spring (a driving element) at a specified angle by a method wherein ends of a bias spring and the shape memory alloy spring are attached to an opening which is communicated to a cooled air inlet, and ribs are provided on a fixing plate to keep the two springs at a certain angle. CONSTITUTION:A base plate 20 is provided with a protrusion part 24 and a second opening 27. The protrusion part 24 has U-shaped bearings 22 on which rotary pins 22a of a shutter plate 22 are rotatably supported. The second opening 27 accommodates a shape memory alloy spring 25 as a driving source and a bias spring 26. The shutter plate 22 has a shutter part 22b and a spindle part 22d with two hooks A and B (22c and 22e) which hold the shape memory alloy spring 25 and the bias spring 26. The shutter part 22b opens and closes a first opening 21 of the base plate 20 and a sealing material 28 is attached on it to seal the first opening 21. The rotary pins 22a are provided on both ends of the spindle part 22d and rotatably fitted on the U-shaped bearings 24 of the base plate 20. A cover 29 is mounted on the base plate 20 by tapping screws 30 and restricts the longitudinal positioning of the shutter plate 22. |
