| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a shutter device which making durable and miniaturizing it by reducing the load to a shutter door and its guide part due to the pressure difference of the inside and the outside. <P>SOLUTION: The shutter door 2 is openably/closably arranged in an opening 1 and a plurality of ventilation ports 21 are formed in the shutter door 2. A mechanism for opening/closing the ventilation ports which closes the ventilation ports 21 when the shutter door 2 is closed and opens the ventilation ports 21 at the time when opening/closing the shutter door 2 is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
