| 摘要 |
A shutter apparatus for a camera is provided to obtain a simplified structure by operating a first shutter, a second shutter and an iris diaphragm using a permanent magnet and an electromagnet. A shutter apparatus(1) for a camera comprises a base plate(10) having a large light transmission hole(11), a first shutter(20), a second shutter(30), a shutter arm(55) rotatably installed at a side of the base plate, a shutter permanent magnet(50), a first shutter electromagnet(61) and a second shutter electromagnet. The first and second shutters rotate on a shutter rotation shaft(27) while overlapping an upper surface of the base plate to open/close the large-sized light transmission hole. The shutter arm allows the first and second shutters to rotate on the shutter rotation shaft. The shutter permanent magnet rotates together with the shutter arm. The first and second shutter electromagnets are installed at a side of the shutter permanent magnet. |
