| 摘要 |
PCT No. PCT/SE90/00403 Sec. 371 Date Dec. 18, 1991 Sec. 102(e) Date Dec. 18, 1991 PCT Filed Jun. 11, 1990 PCT Pub. No. WO91/00066 PCT Pub. Date Jan. 10, 1991.A sealing and bearing arrangement in electric toothbrushes is characterized by a sealing ring (9) for preventing foreign material from penetrating into a bearing space, the ring being arranged around a nose pin (1) in the open end (7) of a casing (5), which coaxially surrounds the nose pin (1), and being immobile when the nose pin (1) rotates; an annular supporting plate (10) which is provided close to and inwardly of the sealing ring (9) and which is immobile when the nose pin (1) rotates; and bearing balls (11) provided in two races, one on each side of a thickened portion (4) of the central member of the nose pin (1), for taking up forces in all directions. |
