Head for an oral care implement
View Patent ↗A head for an oral care implement has at least a first row of tufts including a plurality of filaments having free ends and fixed ends being opposite the free ends and being fixed on a mounting surface of the head. The filaments of the at least first row of tufts extend from the mounting surface of the head in different length extensions thereby defining with the filaments' free ends an upper top cleaning surface in the form of a continuous wave-shape. Each filament has a longitudinal axis and a cross-sectional area extending in a plane that is perpendicular to the longitudinal axis. The filaments of the longest length extension have a cross-sectional area being smaller than the cross-sectional area of the filaments of the shortest length extension.
1. A toothbrush head ( 14 ) for an oral care implement ( 10 ) comprising:
at least a first row ( 16 ) of tufts ( 46 , 47 , 48 ) comprising a plurality of filaments having free ends ( 30 ) and fixed ends ( 32 ) being opposite the free ends ( 30 ) and being fixed on a mounting surface ( 22 ) of the head ( 14 ), and the filaments of the at least first row ( 16 ) of tufts ( 46 , 47 , 48 ) extending from the mounting surface ( 22 ) of the head ( 14 ) in different length extensions ( 42 , 44 ) thereby defining with the filaments' free ends ( 30 ) an upper top cleaning surface ( 34 ) in the form of a continuous wave-shape ( 36 ) comprising at least one wave crest and at least one wave trough located between a first tuft and a last tuft of the at least first row ( 16 ) of tufts,
at least a second row ( 18 ) of tufts ( 50 , 51 , 52 ) comprising a plurality of filaments, the second row ( 18 ) being substantially parallel to the first row ( 16 ), and the filaments of the second row ( 18 ) extend from the mounting surface ( 22 ) in different length extensions ( 42 , 44 ) thereby defining with the filaments' free ends ( 30 ) an upper top cleaning surface ( 34 ) in the form of a continuous wave-shape ( 36 ) comprising at least one wave crest and at least one wave trough located between a first tuft and a last tuft of the at least second row ( 18 ) of tufts ( 50 , 51 , 52 ),
each filament of the first row ( 16 ) and each filament of the second row ( 18 ) having a longitudinal axis and a cross-sectional area extending in a plane that is perpendicular to the longitudinal axis,
wherein the filaments of the longest length extension ( 42 ) have a cross-sectional area being smaller than the cross-sectional area of the filaments of the shortest length extension ( 44 )
wherein the tufts ( 50 , 51 , 52 ) of the second row ( 18 ) are arranged in a manner that the wave-shape form is contra-cyclical with respect to the wave-shape form of the first row ( 16 ), wherein the contra-cyclical wave-shape form comprises a phase shift between the first row ( 16 ) and the second row ( 18 ) from about 120 to about 180 degrees.
2. The toothbrush head ( 14 ) according to claim 1 , wherein a difference in length between the longest length extension ( 42 ) and the shortest length extension ( 44 ) is from about 1.5 mm to about 2.0 mm.
3. The toothbrush head ( 14 ) according to claim 1 , wherein each tuft ( 46 , 47 , 48 ) of the at least first row ( 16 ) has a longitudinal axis and a cross-sectional area extending in a plane that is perpendicular to the longitudinal axis, and the cross-sectional area of each tuft ( 46 , 47 , 48 ) has substantially the same size, and the tuft ( 46 ) comprising the filaments of the longest length extension ( 42 ) comprises a higher amount of filaments than the tuft ( 48 ) comprising the filaments of the shortest length extension ( 44 ).
4. The toothbrush head ( 14 ) according to claim 1 , wherein the longest filaments have a substantially circular cross-sectional area with a diameter of about 0.15 mm to about 0.18 mm.
5. The toothbrush head ( 14 ) according to claim 1 , wherein the shortest filaments have a substantially circular cross-sectional area with a diameter of about 0.20 mm to about 0.23 mm.
6. The toothbrush head ( 14 ) according to claim 1 , wherein the head ( 14 ) has a longitudinal extension ( 28 ) extending between a proximal end ( 23 ) of the head ( 14 ) which is attached or attachable to a handle ( 12 ) and a distal end ( 24 ) being opposite the proximal end ( 23 ), and the at least first row ( 16 ) of tufts ( 46 , 47 , 48 ) is arranged substantially parallel to the longitudinal extension ( 28 ) of the head ( 14 ).
7. The toothbrush head ( 14 ) according to claim 1 , wherein the head ( 14 ) comprises a third row ( 19 ) of tufts ( 50 , 51 , 52 ) comprising a plurality of filaments and a fourth row ( 20 ) of tufts ( 46 , 47 , 48 ) comprising a plurality of filaments, the third row ( 19 ) and the fourth row ( 20 ) being substantially parallel to the first row ( 16 ) and the second row ( 18 ).
8. The toothbrush head ( 14 ) according to claim 7 , wherein the continuous wave-shaped upper top cleaning surface ( 34 ) of the third row ( 19 ) has the same configuration as the upper top cleaning surface ( 34 ) of the second row ( 18 ), and the continuous wave-shaped upper top cleaning surface ( 34 ) of the fourth row ( 20 ) has the same configuration as the upper top cleaning surface ( 34 ) of the first row ( 16 ), and the first row ( 16 ) and the fourth row ( 20 ) are arranged at the respective outer edges ( 38 ) of the mounting surface ( 22 ) of the head ( 14 ) and the second row ( 18 ) and the third row ( 19 ) are arranged between the first row ( 16 ) and the fourth row ( 20 ).
9. The toothbrush head ( 14 ) according to claim 1 , wherein the tufts ( 46 , 47 , 48 ) of the at least first row ( 16 ) are inclined with respect to the mounting surface ( 22 ) in a direction substantially parallel to the longitudinal extension ( 28 ) of the head ( 14 ).
10. The toothbrush head ( 14 ) according to claim 9 , wherein the tufts ( 50 , 51 , 52 ) of the second row ( 18 ) are inclined in the opposite direction with respect to the first row ( 16 ).
11. The toothbrush head ( 14 ) according to claim 7 , wherein the tufts ( 46 , 47 , 48 ) of the first row ( 16 ) and the tufts ( 46 , 47 , 48 ) of the fourth row ( 20 ) are inclined in a direction toward the proximal end ( 23 ) of the head ( 14 ), and the tufts ( 50 , 51 , 52 ) of the second row ( 18 ) and the tufts ( 50 , 51 , 52 ) of the third row ( 19 ) are inclined in a direction toward the distal end ( 24 ) of the head ( 14 ).
12. The toothbrush head ( 14 ) according to claim 9 , wherein the tufts ( 46 , 47 , 48 , 50 , 51 , 52 ) are inclined with respect to the mounting surface ( 22 ) by an inclination angle (a) from about 65° to about 80.
13. An oral care implement ( 10 ) comprising a toothbrush head ( 14 ) according to claim 1 .