| 摘要 |
A ventilator includes: a plurality of louvers arranged in parallel from one end to the other end of one direction at a supply opening formed in a case; shaft pins respectively formed on both ends at one ends of the louvers and inserted into a plurality of shaft holes; the operation pins being inserted into a plurality of operation holes formed along a longitudinal direction of a link with predetermined intervals; and a standard louver being opened and closed with the shaft pins serving as a center of opening and closing, wherein, gaps (A) between the operation holes on the link are set so as to be larger than gap (B) between a line connecting the shaft pins of the standard louver and the operation pin.
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