| 摘要 |
The present invention relates to a toothbrush head having a bristle support on which a bristle arrangement which has a large number of filaments is arrange d, wherein at least one filament is tapered in the direction of its free end, a nd also to a toothbrush having a toothbrush head of this type. The invention proposes providing the tapered area at the tip of the at least one filament with a shape which deviates from a rotationally symmetrical form in order to maintain a high bending stiffness of the filament in one direction. Accordin g to the invention, the tapered area is in the form of a pressed-flat sharpene d area, so that the filament has a greater bending stiffness in the region of the tapered area with respect to a first transverse axis than with respect t o a second transverse axis which is at right angles to said first transverse axis. The filament cross section in the region of the pressed-flat sharpened area has a longitudinal axis or long main axis and a shorter transverse axis or short main axis, as a result of which the filament is provided with different geometric moments of inertia with respect to the two said axes in the region of the sharpened area. The pressed-flat sharpened area at the tip of the filament facilitates penetration into the interdental spaces, wherein the higher geometric moment of inertia of the broad side reduces bending her e.
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