| 摘要 |
In an inner blade (5) for electric shaver comprising plural blade elements (30) which are supported on a base (20), and reciprocally driven parallel to an outer foil blade (10) having beard/moustache/whisker introduction apertures (11) so as to cut beards, moustaches or whiskers by the inner blade and the outer foil blade, wherein the plural blade elements (30) are arranged in parallel each other; a pair of cutting edges (32) is provided symmetrically on both sides of a top portion of each blade element (30); each cutting edge (32) is established with a top face (31) of the blade element (30) and a cutting face (33) slanted for the top face (31); a cusp of the cutting edge (32) is rounded to have a radius of curvature R (µm); and as an angle of the cutting face for the top face is designated by a symbol ± (degree), the radius of curvature R of the cusp of the cutting edge is selected to satisfy a relation that R‰¦-0.02·± +1.1 (µm). |
