Brush head for a sonic or ultrasonic toothbrush and toothbrush

Abstract

The invention relates to a brush head with an integrated ultrasonic transducer and with a plurality of bristle tufts that are arranged on a baseplate and can be caused to vibrate by the ultrasonic transducer during operation, wherein the bristle tufts are arranged in a plurality of substantially parallel rows aligned symmetrically relative to a central longitudinal axis or central plane of the baseplate, wherein a first row and at least one second row are provided in the transverse direction as viewed from the central longitudinal axis or central plane, and wherein all bristle tufts of a row are the same length. Such a The brush head is to be improved so that a particularly thorough and reliable cleaning of the teeth is possible when a fixedly installed brace is present. For this purpose, the bristle tufts of the second row are designed according to the invention to be longer than the bristle tufts of the first row.

1 . A brush head for a sonic or ultrasonic toothbrush, comprising:
 an ultrasonic generator and a plurality of bristle bundles, which are arranged on a base plate and during operation are set into oscillations by the ultrasonic generator, the plurality of bristle bundles being arranged in a plurality of rows oriented essentially parallel and symmetrical to a middle longitudinal axis of the base plate, at least one first row of bristle bundles and thereon adjoining at least one second row of bristle bundles provided in a crosswise direction to the middle longitudinal axis, the plurality of bristle bundles in each row being of a same length or essentially the same length, the plurality of bristle bundles of at least one second row of bristle bundles being longer than the plurality of bristle bundles of the at least one first row of bristle bundles.   
     
     
         2 . The brush head according to  claim 1 , wherein the plurality of bristle bundles of the at least one first row of bristle bundles stand perpendicular on a reference plane of the base plate. 
     
     
         3 . The brush head according to  claim 1 , wherein outside of the at least one second row of bristle bundles at least one third row of bristle bundles is provided, and the bristle bundles of the at least one third row stand perpendicular to a reference plane of the base plate and/or are of a same length as the bristle bundles of the at least one second row. 
     
     
         4 . The brush head according to  claim 1 , whereby on both sides of the middle longitudinal axis the at least one second row of bristle bundles and/or at least one third row of bristle bundles is provided. 
     
     
         5 . The brush head according to  claim 1 , wherein the bristle bundles of the at least one second row stand perpendicular to a reference plane of the base plate or are inclined toward the middle longitudinal axis. 
     
     
         6 . The brush head according to  claim 3  wherein the bristle bundles of the at least one third row stand perpendicular to the reference plane of the base plate or are inclined toward the middle longitudinal axis. 
     
     
         7 . The brush head according to  claim 5 , wherein an angle of inclination of the bristle bundles of the at least one second row relative to the reference plane of the base plate is in a range between 65° and 85°. 
     
     
         8 . The brush head according to  claim 3 , wherein the bristle bundles of the at least one third row are arranged at a same angle of inclination on the base plate as the bristle bundles of the at least one second row. 
     
     
         9 . The brush head according to  claim 3 , wherein the bristle bundles of the at least one third row are at essentially a same height above the base plate as the bristle bundles of the at least one second row. 
     
     
         10 . The brush head according to  claim 1 , wherein free brush ends of inclined bristle bundles are cut so that they lie in a common plane. 
     
     
         11 . The brush head according to  claim 1 , wherein each of the at least one first row of bristle bundles and the at least one second row of bristle bundles comprises from six to eight bristle bundles. 
     
     
         12 . The brush head according to  claim 1 , wherein the bristle bundles of the at least one first row have a length in the range between 3 mm and 5 mm. 
     
     
         13 . The brush head according to  claim 1 , wherein the bristle bundles of the at least one second row have a length in the range between 6 mm and 10 mm. 
     
     
         14 . The brush head according to  claim 1 , wherein a distance between adjacent rows of bristle bundles viewed in crosswise direction is in the range of 2 mm to 3 mm. 
     
     
         15 . (canceled) 
     
     
         16 . The brush head according to  claim 6 , wherein an angle of inclination of the bristle bundles relative to a reference plane of the base plate is in the a range between 65° and 85°.