| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a filter having an inexpensive and simple structure and suppressing coming off of a filter material while using a filter. <P>SOLUTION: The filter 1 includes a first case member (upper case member 3) and a second case member (lower case member 4) which butt against each other to form a filter chamber, and the filter material 5, the ends of which are held between the first case member and the second case member. The first case member and the second case member have holding portions 15 and 16 for holding the bent ends of the filter members, and welded portions 22 and 23 provided at positions away from the holding portions and welded by a laser beam, respectively. The holding portions have vertically pressing surfaces 15a and 16a for pressing an inside end portion 12a of the filter material in a butting direction P, and horizontally pressing surfaces 15b and 16b for pressing an outside end portion 12b of the filter material in a direction orthogonal to the butting direction, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT |
