| 摘要 |
PURPOSE:To provide a radio wave sealing device in which a double-folded position divided by a slit is not easily bent by an external force, and the electric wave sealing device can be obtained from one sheet of plate even though the pitch of the slit is small. CONSTITUTION:A double-folded piece 20 is formed by forming round holes 22 at the bending part of the double-folded piece 20, making the width of slits 19 3mm or larger, and placing a metal mold in the groove of the peripheral edge bending part 16 in the manufacture. The stress concentration between the round holes 22 and the end of the double-folding piece 20 can be dispersed by making the radius R of the round holes larger than that of a long hole, And by placing a metal mold in the groove of the peripheral edge bending part in the manufacture, the bending part 16 is never bent between the neighboring slits 19 and 19 even though the pitch of the slits 19 is small, and the radio wave sealing device can be manufactured from one sheet of plate.
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