| 摘要 |
PURPOSE: An iris device for a camera is provided to omit a process assembling a very small sized torsion spring to a subminiature iris device, thereby performing an assembly and maintenance easily and reducing manufacturing costs. CONSTITUTION: An iris device for a camera comprises a driving unit(30). The driving unit makes a pair of blades(51,53) reciprocates in order to open and close an optical penetration hole(11) formed a base(10). The driving unit comprises a yoke(39) forming a permanent magnet, a bobbin(33), arm levers(37), and a notch unit(39a). The bobbin rotates with the permanent magnet and both sides of the bobbin are connected to the pair of blades. The notch unit is formed into a cylindrical shape in order to cover the bobbin and fixing a posture of the permanent magnet. |
