The present invention and at the same time relates to a powered toothbrush to brush while using an electrical rotating the brush, so that by having two cylindrical brushes to rotate by the driving motor to clean the front and back of the teeth (齒 牙) at the same time in the case of upper teeth the direction of movement of the brush brush there under, in the case of lower teeth have not only be wiped clean every corner of the uneven teeth by allowing movement from the bottom up, reducing the brushing time and even less lifting force of arms above the convenience of the teeth, such relates to a further increase of the electric toothbrush.
Toothbrushes of the present invention is the battery and the drive motor 30 to the inside (31) that is embedded handle 20, and two cylindrical brushes (22) which are spaced apart from each other by a distance corresponding to the tooth thickness, the drive motor ( 30) the output shaft and the power transmission device that is configured between the two cylindrical brushes (22), and as being coupled to the handle 20, the lower is it possible to rotate the two cylindrical brushes (22) to the tip installation of in the electric toothbrush comprising a cover (21a) and the front end cover (21c), a cylindrical brush installation sphere is formed (21), said cylindrical brush installation opening 21 is inserted into the projection of the annular (21b) formed on the end portion and by the handle a small-diameter portion 23, an annular insertion groove (23a) formed in the front end portion of 20, and is to the handle 20 and the separation, the front end cover of the cylindrical brush installed obtain (21) (21c ), a cylindrical brush is formed a chukhom (21ca) which central axis is rotatably inserted in (22), the axis of the central blocking plate (21d) and the power transmission device for preventing the toothpaste foam flowing into the interior tube that passes through the side clearance of both sides (21e) which is formed; The power transmission device is connected to the axis of the driving motor 30 extends in the power transmission projection (32a) is formed in the output shaft 32, the cylindrical brush installed obtain the extension axis as being installed on the 21 a power transmission groove (40a) is an input shaft 40 which is formed to be coupled to the power transmission projection (32a) of 32, and the transfer by dividing the power output from the input shaft (40) of two cylindrical brushes (22) which includes a power splitting means; Said power dividing means has been made that is configured on the inside of the cylindrical brush installation opening 21 is shielded by the central blocking plate (21d) and the side tube clearance (21e), the drive gear that is installed in front of the input shaft 40 41, the drive gear 41, the driven gear 42 that meshes with the drive gear 41 and the driven gear of two flexible shaft that are connected to the 42 (43a), (43b), and the two of the flexible shaft (43a), (43b) are connected is provided on the rear side of the two cylindrical brushes (22) comprises a gear train for rotating the central axis of the cylindrical brush (22).