| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter for an electric fan that is inexpensive, has high yield of non-woven fabric, can be used regardless of size of a blade guard, and has an increased dust collecting effect. SOLUTION: The non-woven fabric 16 is rectangular, so that the non-woven fabric 16 can be easily manufactured easily with high yield by cutting a band- like non-woven fabric, and the cost is reduced. Flat rubber bands 17 and 18 are loosely inserted into band insert parts 20 and 21 of the non-woven fabric 16, so that the non-woven fabric 16 can uniformly and sufficiently cover the entire guard regardless of the size of the blade guard 15, and tightness of a back surface part 15A by the filter 10 for the electric fan is increased and the dust collecting effect is also increased. Many gathers are produced at ends of the non-woven fabric 16 covering the inner periphery with a small diameter of the blade guard 15. The gathers increases the tightness of the non-woven fabric 16, and a collecting area is also increased by a gather forming part of the entire non-woven fabric 16. As a result, the dust collecting effect is further increased.
|
