Classifications

• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46D—MANUFACTURE OF BRUSHES
  • A46D1/00—Bristles; Selection of materials for bristles
  • A46D1/04—Preparing bristles
  • A46D1/05—Splitting; Pointing
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46D—MANUFACTURE OF BRUSHES
  • A46D1/00—Bristles; Selection of materials for bristles
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B9/00—Arrangements of the bristles in the brush body
  • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
  • A46B9/04—Arranged like in or for toothbrushes
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46D—MANUFACTURE OF BRUSHES
  • A46D1/00—Bristles; Selection of materials for bristles
  • A46D1/02—Bristles details
  • A46D1/0276—Bristles having pointed ends
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46D—MANUFACTURE OF BRUSHES
  • A46D1/00—Bristles; Selection of materials for bristles
  • A46D1/04—Preparing bristles
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B2200/00—Brushes characterized by their functions, uses or applications
  • A46B2200/10—For human or animal care
  • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

Definitions

• the present invention relates to a toothbrush head having a bristle carrier on which is disposed a bristle field having a plurality of filaments, at least one filament having a taper towards its free end, and a toothbrush having such a toothbrush head.
• JP 11-075939 shows a toothbrush bristle in which such filaments are provided with tapers towards their tip, but ultimately no truly improved penetration into the interdental spaces is ensured.
• US 2005/0172436 is also proposed to provide the existing of a variety of elements bristle tufts with a tapered head by the individual filaments have a stepped length. However, this does not really facilitate penetration into the interdental space unless the individual filaments themselves have sufficient tapering or tapering at their free ends.
• the present invention has for its object to provide an improved toothbrush head of the type mentioned, which avoids the disadvantages of the prior art and further develops the latter in an advantageous manner.
• an improved penetration of the filaments into the interdental spaces is to be achieved.
• the taper at the tip of the at least one filament a shape deviating from a rotationally symmetrical shape, in order to be in one Direction to maintain a high bending stiffness of the filament.
• the taper is formed in the form of a flattened sharpening, so that the filament has a greater flexural rigidity in the region of the taper with respect to a first transverse axis than with respect to a second transverse axis perpendicular thereto.
• the filament cross section in the area of the flattened sharpening has a longitudinal axis or long main axis and a shorter transverse axis or short main axis, as a result of which the filament in the region of the sharpening receives different area moments of inertia with respect to the two said axes.
• the flattened sharpening at the tip of the filament facilitates penetration into the interdental spaces, with the higher area moment of inertia of the broad (non-tapered) side (s) reducing flexing.
• the flattened sharpening or sharpening of the filament is therefore limited to one side or to two opposite sides of the filament end.
• the filament is sharpened wedge-shaped at its free end.
• the sharpening can be formed by only one inclined surface which is inclined at an acute angle to the filament longitudinal axis.
• the wedge-shaped sharpening of two opposite, mutually angled inclined inclined surfaces may be formed, so that the free end of the filament has a substantially pitched roof-shaped contour.
• the at least one inclined surface which forms the wedge-shaped sharpening of the filament, can be formed flat in the development of the invention.
• the inclined surface may also have a curvature, which is preferably formed uniaxial.
• the at least one inclined surface has a convex curvature, wherein the curvature axis can extend transversely to the filament longitudinal axis.
• the inclined surface may also be convexly curved about an axis which lies in a plane containing the filament longitudinal axis.
• the at least one inclined surface may also have a concave curvature, wherein the curvature axis in the aforementioned manner may extend transversely to the filament longitudinal axis and / or may lie in a plane containing the filament longitudinal axis.
• the flattened sharpening at the end of the filament has a rounding at its edge. In this way, despite the slight penetration into spaces a gentle tooth cleaning and avoidance of gum injuries can be achieved.
• the rounding of the sharpening can be provided on the front side at the end of the filament and / or towards the side flanks.
• the filament may have at its free end a blunt head surface or residual surface, which passes over said rounding into the oblique surface of the sharpening.
• the thickness of the obtuse head surface, which is left standing from the sharpening, can in principle be dimensioned differently, depending on which sharpness is necessary and appropriate for the specific application.
• said blunt head surface may have a thickness of about V 5 to 2 I 5 of the filament diameter.
• the inclination of the aforementioned inclined surfaces to one another or to the longitudinal axis of the filament can basically also be chosen differently.
• a favorable compromise between on the one hand a sufficient thinning, which allows penetration into the interdental spaces, and on the other hand, a sufficient remaining strength is achieved in a further development of the invention by a wedge angle of the sharpening of less than 40 °, preferably less than 30 °.
• a sharpening with a wedge angle in the range of 15 ° to 25 ° may be provided.
• the at least one filament can basically have different cross-sectional shapes.
• the filament has a circular cross-section in the non-sharpened area.
• the at least one filament is specifically aligned on the bristle carrier in such a way that the flattened sharpening can easily penetrate into the interdental spaces and the filament has its higher flexural rigidity during wiping movements in the interdental spaces, ie parallel to the tooth axis.
• the at least one filament can be arranged on the bristle carrier such that at - A -
• the longer cross-sectional main axis of the view extends parallel to the interdental space.
• the filament can be aligned differently on the bristle carrier.
• the filament is advantageously oriented in such a way that the said longer cross-sectional main axis of the sharpening extends transversely to the toothbrush longitudinal axis. If the sharpening in the aforementioned manner by two mutually inclined inclined surfaces formed, the ridge formed thereby extends between the two inclined surfaces transverse to the toothbrush longitudinal axis.
• the toothbrush head can also be intended for an electric toothbrush.
• the sharpened filaments can be arranged or aligned differently.
• the toothbrush head with its bristle carrier can be driven in a rotationally oscillating manner about a drive axis which extends parallel to the toothbrush longitudinal axis.
• the at least one filament is aligned with the flattened sharpening similar to the aforementioned manual toothbrush.
• the longer cross-sectional main axis extends transversely to the toothbrush longitudinal axis.
• the toothbrush head may also have a bristle carrier, which can be rotationally driven to oscillate about a transverse axis, which is approximately perpendicular to the toothbrush longitudinal axis.
• the at least one filament with the flattened sharpening is advantageously arranged in a sector of the bristle which is in the rotational center position of the bristle carrier approximately on the toothbrush longitudinal axis, said sector may include different angular ranges, but advantageously less than 45 °, especially less than 30 °, can be.
• the filaments arranged in these two sectors or angle sectors perform, when the brush head is applied as intended with an approximately tangential orientation of the bristle carrier to the dental arch, a movement which extends at least approximately in the direction of the slot-shaped interdental space.
• the filament is aligned with the longer cross-sectional main axis of its sharpening transversely to the toothbrush longitudinal axis.
• the bristles of the toothbrush head can basically consist of a plurality of filament tufts or bristle tufts in a manner known per se, it being possible for further wiping elements such as wiping strips, plastic wipers or elastomeric wipers to be provided, if necessary.
• the bristles comprise at least one bristle tufts, in which the plurality of filaments are formed in the aforementioned manner.
• the filaments within a bristle tuft are at least approximately the same orientation, ie the longer cross-sectional major axis of the sharpening extends in the same direction in all filaments of the tuft.
• the sharpening in particular the at least one inclined surface and / or this limiting rounding, generated by grinding the finished bristled bristle carrier.
• FIG. 1 is a side view of a wedge-shaped sharpened filament of a toothbrush according to a preferred embodiment of the invention
• FIG. 2 shows a side view of the filament from FIG. 1 rotated by 90 ° with respect to FIG. 1, showing an oblique surface of the sharpening in plan view, FIG.
• FIG. 3 shows a side view of a filament with a wedge-shaped sharpening according to a further preferred embodiment of the invention
• FIG. 4 shows a side view of the filament from FIG. 3 rotated by 90 ° with respect to FIG. 3, which shows the one oblique surface of the sharpening in plan view, FIG.
• FIG. 5 shows a side view of a filament with a wedge-shaped sharpening according to a further preferred embodiment of the invention
• FIG. 6 a side view of the filament from FIG. 5 rotated by 90 ° relative to FIG. 5, showing the one oblique surface of the sharpening in plan view
• FIG. 6 shows a side view of the filament from FIG. 5 rotated by 90 ° relative to FIG. 5, showing the one oblique surface of the sharpening in plan view
• FIG. 7 shows a side view of a filament with a wedge-shaped sharpening according to a further preferred embodiment of the invention
• FIG. 8 shows a side view of the filament from FIG. 7 rotated by 90 ° with respect to FIG. 7, which shows the one oblique surface of the sharpening in plan view, FIG.
• FIG. 9 shows a cross section through a mutually sharpened filament according to an advantageous embodiment of the invention, in which the oblique surfaces of the sharpening are convexly curved,
• FIG. 10 shows a cross section through a mutually sharpened filament according to an advantageous embodiment of the invention, in which the oblique surfaces of the sharpening are concavely curved,
• FIG. 11 is a plan view of a manual toothbrush with a toothbrush head according to a preferred embodiment of the invention.
• FIG. 12 is a plan view of an electric toothbrush with a toothbrush head according to a preferred embodiment of the invention, which is rotatably driven to oscillate about a longitudinal axis of the toothbrush, and
• FIG. 13 shows a plan view of an electric toothbrush with a toothbrush head according to a preferred embodiment of the invention, the bristle field of which is rotationally drivable oscillating about a transverse axis.
• Figures 1 and 2 show a filament or toothbrush filament 1, which is inserted into a bristle carrier 2 of a toothbrush head, not shown in detail in Figures 1 and 2.
• the filament 1 has at its base a substantially circular cylindrical shape, which is sharpened double-sided towards the free end 3 of the filament 1 out.
• the two beveled Chen 5 and 6 include in the illustrated embodiment between them a wedge angle 7 of about 20 ° to 25 °, wherein the two inclined surfaces 5 and 6 are arranged such that forms a straight ridge at the free end 3.
• the AnMrfung 4 is blunted in the illustrated embodiment at her head.
• the inclined surfaces 5 and 6 are not completely merged at the free end 3 to a mathematical line, but still slightly spaced apart, so that forms a blunt, ungrind rectangular top surface 8.
• a bevel 12 is provided at the front edge of the inclined surfaces 5 and 6, via which the inclined surfaces 5 and 6 merge into the blunt head surface 8.
• the rounding 12 follows the entire outer contour of the inclined surfaces 5,6.
• the scarfing 4 is designed in total in such a way that it extends over a length 10 which is about 3/8 of the total length of the filament 1 in the embodiment drawn. 11 A thickness 9 of the blunt head surface 8 is about% of the filament diameter in the illustrated embodiment.
• the sharpening 4 of the filament 1 can also be formed by a single oblique surface 5 which also extends at an acute angle to the longitudinal axis of the respective filament 1, as shown in FIGS. 3 and 4.
• the oblique surface 5 is advantageously less sharply inclined with respect to the filament longitudinal axis than with a double-sided sharpening.
• the angle of inclination of the inclined surface 5 is approximately 25 ° in the embodiment shown in FIG. 3, so that the sharpening 4 in turn has a total wedge angle 7 of approximately 25 °.
• the oblique surface 5 is planar, so that, together with the circular-cylindrical basic shape of the filament 1, an elliptical shape of the oblique surface 5 results, as FIG. 4 shows.
• the end edge of the inclined surface 5 is rounded in the embodiment according to Figures 3 and 4.
• the inclined surface 5 is also in the embodiment of Figures 3 and 4 in the blunt head surface 8 via.
• the arrangement of the inclined surface 5 is here also made such that the AnMrfung 4 extends over the entire length 10, which is about% of the total length 11 of the filament 1, and that the thickness 9 of the obtuse head surface 8 about ⁇ A of the total thickness of the Filaments is 1.
• the embodiment shown in Figures 5 and 6 substantially corresponds to the embodiment shown in Figures 1 and 2, wherein the inclined surfaces 5 and 6 are not flat here, but have a concave curvature about an axis transverse to the filament longitudinal axis.
• the wedge angle 7 thus decreases between the oblique surfaces 5 and 6 towards the free end 3 of the filament 1.
• inventions 7 and 8 also corresponds in principle to the double-sided sharpening according to the embodiment of Figures 1 and 2, wherein the inclined surfaces 5 and 6 here, however, have a convex curvature, namely about a curvature axis transverse to the filament longitudinal axis, so that the wedge angle 7 increases gradually between the inclined surfaces 5 and 6 towards the free end 3 of the filament. It is advantageously also between 15 ° and 35 °.
• the inclined surfaces 5 and 6 may also have a convex or concave curvature about a curvature axis extending in a plane containing the filament longitudinal axis.
• FIG. 9 shows such a convex curvature
• FIG. 10 shows a corresponding concave curvature of the inclined surfaces 5 and 6.
• the sharpening 4 and the rounding 12 can be produced by grinding the filaments of the finished bristled bristle carrier 2.
• the filaments 1 shown in FIGS. 1 to 10 have in common that the sharpening 4 is substantially wedge-shaped and the filaments 1 in the region of the sharpening 4 have different area moments of inertia relative to mutually perpendicular or perpendicular axes.
• the flexural rigidity of the filament 1 is greater in one direction 13 of the longer cross-sectional main axis (compare Figures 2, 4, 6 and 8) than in the direction of the shorter cross-sectional major axis of the sharpening 4. In other words, this means that the filament 1 stiffer when bending it parallel to the bevels 5 and 6 of the sharpening, while it is less stiff when bending it at right angles to the inclined surfaces 5 and 6.
• the filaments 1 are oriented such that the direction 13 of the longer cross-sectional major axis extends parallel to the slot-shaped interdental spaces when the toothbrush is placed on the dental arch as intended.
• the filaments 1 can be combined into bristle tufts 14, which together form a bristle field 15 which is arranged on the bristle carrier 12 of a toothbrush head 17. If the toothbrush head 17 is part of a manual toothbrush, as shown in FIG. 11, the filaments 1, with their longer cross-sectional main axis extending in the direction 13, are aligned transversely to the toothbrush longitudinal axis.
• the toothbrush head 17 is intended for an electric toothbrush, in which the bristle carrier 2 is rotationally driven to oscillate about a drive axis 18 which extends parallel to the toothbrush longitudinal axis, as FIG. 12 shows.
• the rotationally oscillating movement about the drive axis 18 illustrates an arrow 19.
• the filaments 1 are aligned with their longer cross-sectional main axis in the direction 13 transversely to the toothbrush longitudinal axis and thus transversely to the drive axis 18.
• the bristle carrier 2 is formed substantially disc-shaped or oval and about the drive axis 18 rotationally drivable.
• the drive shaft 18 is approximately at right angles to the toothbrush longitudinal axis.
• these may be bristle tufts 20 and 21 arranged in angular sectors 22 and 23 of the approximately total cylindrical or e.g. oval bristle field 15 are located in the rotational center position of the bristle carrier 2 on the toothbrush longitudinal axis and are arranged symmetrically to this.
• Said sectors 22 and 23 can cover different angular ranges, in the illustrated embodiment about 30 ° each.
• the filaments 1 are also aligned transversely to the toothbrush longitudinal axis with their longer cross-sectional main axes in the direction of the arrow 13 when the bristle carrier 2 is in its rotational center position.
• An advantageous development relates to the oppositely disposed sectors 24 and 25, which form the bristle field 15 optionally additionally in a special education in addition to the sectors 22 and 23.
• the filaments 1 are arranged in bristle tufts 26 and 27 so that the longer cross-sectional major axis of the sharpening 4 is in the direction of the arrow 13 transverse to the toothbrush longitudinal axis. All filaments 1 in the bristle field 15 are thus aligned parallel with their sharpening 4. Does that Borstenfeld 15, the rotationally oscillating drive movement according to arrow 19, so is the direction of movement of the filaments 1 of the tufts 26 and 27 in the sectors 24 and 25 approximately transverse to the shorter cross-sectional main axis of AnMrfung 4.
• An advantage of the parallel alignment of the sharpening 4 in all the filaments 1 of a bristle field 15 is the simplified production, for example, if the sharpening 4 is simultaneously ground in all the filaments 1.

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ID=37847043

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• 2006
  • 2006-03-16 DE DE102006012003A patent/DE102006012003A1/de not_active Withdrawn
  • 2006-12-20 CN CN2006800168222A patent/CN101175424B/zh not_active Expired - Fee Related
  • 2006-12-20 MX MX2007012889A patent/MX2007012889A/es active IP Right Grant
  • 2006-12-20 EP EP06829759A patent/EP1993398B1/fr not_active Not-in-force
  • 2006-12-20 WO PCT/EP2006/012278 patent/WO2007104351A1/fr active Application Filing
  • 2006-12-20 KR KR1020077026227A patent/KR20080109587A/ko not_active Application Discontinuation
  • 2006-12-20 AU AU2006339876A patent/AU2006339876A1/en not_active Abandoned
  • 2006-12-20 JP JP2008558653A patent/JP5269617B2/ja not_active Expired - Fee Related
  • 2006-12-20 AT AT06829759T patent/ATE535170T1/de active
  • 2006-12-20 CA CA002608763A patent/CA2608763A1/fr not_active Abandoned
  • 2006-12-20 US US11/914,487 patent/US20080209649A1/en not_active Abandoned
• 2008
  • 2008-07-08 HK HK08107484.0A patent/HK1116639A1/xx not_active IP Right Cessation

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