| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation port capable of avoiding the projection of an operation means from a panel by providing a differential pressure shutter in a ventilation port provided with a push type opening and closing mechanism with a panel moving back and forth. <P>SOLUTION: The ventilation opening is provided with a shutter 9 which is supported slidably back and forth in a front side opening part 5 of a body 2, usually held in a position of closing the front side opening part 5 by an energizing force by an elastic member 8, and opens a ventilation passage 1 by separating from the front side opening part 5 according to an indoor negative pressure due to a pressure difference between the inside and outside of the room. The shutter 9 is constituted so as to be fixed in a closing state by moving a panel part 6 to a predetermined rear position, so that the ventilation port 7 with an good appearance can be obtained avoiding the projection of the operation means from the lower side of the panel part 6 since the panel part 6 can be used as an operation means for fixing the shutter 9 in the closing state. <P>COPYRIGHT: (C)2013,JPO&INPIT |
