| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter which has a simple structure, is easily assembled and attains cost and size reduction, and lightening of weight. SOLUTION: This structure of a filter comprises a biting part 11A and a biting part 12A which are respectively disposed on an upper casing 11 and a lower casing 12, biting surfaces 15, 16 which are disposed on the upper and lower biting parts 11A, 12A and a filter material 17 which is compressed between the biting surface 15 and the biting surface 16. Therein, the shapes of the biting surfaces 15, 16 are the same with that of the filter material and further the shape of the filter material 17 is saw-toothed.
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