| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation structure of an instrument displaying measurement information, which secures excellent waterproofness and dust resistance, and has good efficiency.SOLUTION: A ventilation structure of an instrument includes: a display device 1; a circuit substrate 2 on which a drive circuit for driving the display device 1 is mounted; a first case 4 that covers the display device 1, and has a window part 41 allowing through-view of display output from the display device 1; and a second case 5 that forms the storage spaces of the display device 1 and circuit substrate 2 by being fitted to the first case 4. In a place where the first case 4 and the second case 5 are overlapped, a ventilation hole 51 formed in the second case 5 to be the inside and a porous member 6 covering and closing the ventilation hole 51 are provided. |
