EP0471312B1 - Zahnbürste - Google Patents

Zahnbürste Download PDF

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Publication number
EP0471312B1
EP0471312B1 EP91113431A EP91113431A EP0471312B1 EP 0471312 B1 EP0471312 B1 EP 0471312B1 EP 91113431 A EP91113431 A EP 91113431A EP 91113431 A EP91113431 A EP 91113431A EP 0471312 B1 EP0471312 B1 EP 0471312B1
Authority
EP
European Patent Office
Prior art keywords
bristles
head portion
bristle
implanted
toothbrush
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91113431A
Other languages
English (en)
French (fr)
Other versions
EP0471312A2 (de
EP0471312A3 (en
Inventor
Takayuki Kaneda
Mitsuyuki Kubo
Noriko Hase
Yasuko Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kao Corp
Original Assignee
Kao Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP8561690U external-priority patent/JP2545239Y2/ja
Application filed by Kao Corp filed Critical Kao Corp
Publication of EP0471312A2 publication Critical patent/EP0471312A2/de
Publication of EP0471312A3 publication Critical patent/EP0471312A3/en
Application granted granted Critical
Publication of EP0471312B1 publication Critical patent/EP0471312B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A46B9/045—Arranged like in or for toothbrushes specially adapted for cleaning a plurality of tooth surfaces simultaneously
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand
    • 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

  • This invention relates to a toothbrush, and particularly to a toothbrush capable of sufficiently brushing its user's teeth up to the innermost molars.
  • toothbrushes such as those in which a grip portion and a head portion with bristles implanted therein are arranged in alignment, those in which a head portion with bristles implanted therein is bent or curved relative to a grip portion, and the like.
  • the toothbrushes because the heights of the bristles are arranged to be generally equal to each other, the toothbrushes hardly reach the inner part of the user's buccal cavity and therefore, it was difficult to sufficiently brush the teeth up to the innermost molars.
  • a toothbrush in which the heights of the bristles implanted in the distal area of the head portion are set shorter than the heights of the bristles implanted in the grip side area of the head portion (see Japanese Utility Model Early Laid-open Publication No. Sho 56-67173 and Japanese Utility Model Early Laid-open Publication No. Sho 56-171728, etc.)
  • EP-A-274 618 discloses a toothbrush comprising a grip portion 1A and a neck portion 2, which portions are coupled to each other via a joint mechanism 9. Toothbrush 1 is brought from a first position to a second position by rotating neck portion 7A by 180° relative to grip portion 1A. In this second position the neck portion 7A is inclined by an angle ⁇ relative to grip portion 1A and head portion 6 in turn is bent by an angle ⁇ relative to the axis of neck portion 7A.
  • a toothbrush having a head portion which is divided into a main brush portion 40 and a smaller brush portion 32, which smaller brush portion is located at the tip of the toothbrush.
  • the tip portion carrying the smaller brush portion is thereby raised in regard to the normal brush portion in that the bristles of the smaller brush portion protrude over the bristles of the normal brush portion.
  • Both of the bristles of the normal brush portion as well as of the smaller brush portion are grouped into bristle flocks consisting of bristles of different lengths.
  • GB-A-1 098 933 suggests a toothbrush with a head portion comprising steplike projections 18 and recesses 20 there between. Bristles implanted into sections 18 as well as in recesses 20 have short and long bristles, differing by 1/16 inches in length from each other. Since also the distance between the surface of the projections and the surface of the recesses is 1/16 inches the bristle ends define four distinct layers.
  • a concrete object of the invention is to provide a toothbrush, in which a head portion with bristles implanted therein can be smoothly inserted into the user's buccal cavity up to the molar teeth when the teeth are brushed and in which the flexibility of bristles implanted in a distal area of its head portion is not degraded and the bristles can reach the innermost molars so as not to leave the innermost molars in insufficiently brushed states and so as to sufficiently brush the teeth up to the innermost molars.
  • Fig. 1 is a side view showing a first embodiment of a toothbrush of the present invention.
  • Fig. 2 is a side view showing a second embodiment of a toothbrush of the present invention.
  • Fig. 3 is a side view of an exploded state showing a third embodiment of a toothbrush of the present invention.
  • Fig. 4 is a partly enlarged side view showing one example of a head portion with bristles implanted therein of a toothbrush of the present invention.
  • Fig. 5 is a partly enlarged side view showing another example of the head portion of a toothbrush of the present invention.
  • Fig. 6 is a partly enlarged side view showing a further example of the head portion of a toothbrush of the present invention.
  • Fig. 7 is a partly enlarged side view showing a still further example of a head portion of a toothbrush of the present invention.
  • Fig. 8 is a partly enlarged side view showing a yet further example of a head portion of a toothbrush of the present invention.
  • Fig. 9 is a partly enlarged side view showing additional example of the head portion of a toothbrush of the present invention.
  • Fig. 1 is a side view showing the first embodiment of a toothbrush of the present invention.
  • the toothbrush of this embodiment comprises a grip portion 1, and a head portion 2 with bristles 3 implanted in one surface thereof and integrally connected with the grip portion through a neck portion 4.
  • the head portion 2 is bent or curved toward the bristles side relative to the grip portion 1, and the head portion 2 is also bent toward the head portion side, on which the bristles are provided, relative to the neck portion 4.
  • the length of the head portion 2 is preferably set within a range of from 10mm to 25mm and more preferably within a range of from 12mm to 22mm within the aforementioned range. If the length of the head portion 2 is less than 10mm, there is the danger that the implanting area becomes too small and the brushing efficiency becomes unsatisfactory. On the other hand, if it exceeds 25mm, there is the danger that the tongue sides of the molar teeth become difficult to be brushed.
  • the angle ⁇ 1 of bend of the head portion 2 relative to the neck portion 4 is preferably set within a range of from 5° to 15° and more preferably within a range of from 6° to 10° within the aforementioned range. If the angle ⁇ 1 is less than 5°, there is the danger that the toothbrush is interfered by the cheek when the molar teeth are brushed. On the other hand, if it exceeds 15°, the brushing operation itself becomes difficult to effect.
  • the angle ⁇ 2 (total angle ⁇ 2 including the angle ⁇ 1 ) of bend or curve relative to the grip portion 1 of the head portion 1 is preferably set within a range from 7° to 30° and more preferably within a range of from 10° to 20° within the aforementioned range. If the angle ⁇ 2 is less than 7°, there is the danger that the efficiency for removing the plaque on the molar teeth becomes low and the brushing operation particularly for the molar teeth becomes difficult to effect. On the other hand, if the angle ⁇ 2 of bend or curve exceeds 30°, there are also the fears that the efficiency for removing the plaque on the molar teeth becomes low and the brushing operation particularly for the molar teeth becomes difficult to effect.
  • the materials composing the grip portion 1 and the head portion 2 are not particularly limited but those which are normally used for toothbrushes are good enough.
  • it may be composed of AS (acrylonitrile-styrene resin), ABS (acrylonitrile-butadiene-styrene resin), PP (polypropylene resin), PC (polycarbonate resin), PBT (polybutyleneterephthalate resin), propionate, thermoplastic elastomer, etc.
  • the materials composing the bristles 3 are not limited, either. Those which are used for bristles of conventional toothbrushes can be used.
  • each bristle may be formed in a rounded shape.
  • a toothbrush of this embodiment with the above-mentioned constitution, even a beginner of brushing exercise of a toothbrush can easily insert the head portion 2 into the inner side of the buccal cavity in order to sufficiently brush the cheek and tongue sides of the molar teeth.
  • the Table-1 shows the data obtained through a questioning about the easiness of the use of the toothbrush according to the first embodiment when the angle ⁇ 1 of bend or curve is set to 5°, 10° and 15° and the other angle ⁇ 2 of bend or curve is set to 10°, 20° and 30°.
  • the Table-2 shows the results of removal of artificial plaque under the above-mentioned angles of bend or curve.
  • n 100 ⁇ 1 5° 5° 5° 10° 10° 10° 15° 15° 0° 0° 0° ⁇ 2 10° 20° 30° 10° 20° 30° 20° 30° 10° 20° 30° Easiness of brushing when front teeth are being brushed (%) 57 42 30 62 50 31 47 36 54 36 29 Easiness of brushing when molar teeth are being brushed (%) 72 87 68 64 84 70 76 80 61 68 65
  • the ratio of removing artificial plaque was increased, the brushing operation was carried out with ease, and operation performance was enhanced.
  • Fig. 2 is a side view showing a second embodiment of a toothbrush of the present invention. Like parts of Fig. 1 are denoted by like numerals and description thereof is omitted.
  • the neck portion 4 is inclined such that its nearer part 4a to the grip portion 1 is once curved downward relative to the center line l of the grip portion 1 and then the remaining part of the neck portion 4 is raised up to a position above the center line l.
  • a toothbrush of the present invention is not limited to those in which the head portion 2 is integrally formed with the grip portion 1 as shown in the first and second embodiments.
  • a neck portion 4 and a head portion 2 are removably attached to a grip portion 1 of an electric toothbrush in which a driving source such as a motor 6, etc. is built in the grip portion 1.
  • a driving source such as a motor 6, etc.
  • the numeral 7 denotes a vibrator adapted to incur vibration to the head portion 2 and to interconnect the grip portion 1 and the neck portion 4
  • the symbolic numeral 4b denotes a recess formed in one end face of the neck portion 4 into which the vibrator 7 is removably engaged.
  • the present invention may also be applied to a toothbrush of the type in that a head portion 2 and a neck portion 4 are collapsibly connected to a grip portion 1 through a pin.
  • a toothbrush of the present invention including those of the first, second and other embodiments, becomes more favorable by constituting the head portion in a particular way. Accordingly, the head portions to be described hereinafter can be employed as the head portions in the first, second and other embodiments which are already described above.
  • FIG. 4 through 9 Several embodiments of a head portion of a toothbrush will be described with reference to Figs. 4 through 9.
  • Figs. 4 through 9 different reference numerals are used even for identical or similar parts of Figs. 1 through 3.
  • the heights of bristles 15a implanted in a distal area 12a of a head portion 12 are set shorter than the heights of bristles 16a implanted in the remaining area (the neck portion 14 side area of the head portion 12, hereinafter referred to as the "basal area" 12b) of the head portion 12, the average positions of the tips of the bristles in each bristle flock 15 implanted in the distal area 12a is generally flushed with the average positions of the tips of the bristles in each bristle flock 16 implanted in the basal area 12b, the difference in length between the highest bristle 15a and the lowest bristle 15a in each bristle flock 15 implanted in distal area 12a is set within a range of from 1mm to 4mm and preferably within a range of from 1.0mm to 2.0mm, and the lengths of the bristles 15a in each bristle flock 15 are irregularly set.
  • the distal area 12a is formed such that it rises up to form a step relative to the basal area 12b.
  • the flocks 15 and 16 of the bristles 15a and 16a each comprises a plurality (for example, 30 to 60) of bristles 15a and 16a, respectively, which are implanted in the head portion 12.
  • the lengths of bristles 15 in each bristle flock are irregularly set in a range shorter than 1mm, it becomes almost the same to the one in which the heights of bristles implanted in the distal area 12a of the head portion 12 are merely set short, and on the other hand, if the lengths are irregularly set within a range longer than 4mm, the shortest bristle 15a among the bristles 15a of each bristle flock 15 becomes unable to reach the innermost molars, the gum portion, etc.
  • the lengths of the bristles 16a in each bristle flock implanted in the basal area 12b are preferably irregularly set as in the lengths of the bristles 15a of each bristle flock implanted in the distal area 12a.
  • the average heights of the bristles 15a implanted in the distal area 12a are set 10mm or less, and preferably within a range of from 8mm to 9mm, and have a difference of 0.5mm or more and preferably within a range of from 1mm to 2mm relative to the average heights of the bristles 16a implanted in the basal area 12b.
  • each bristle 15a, 16a is preferably formed in a rounded shape.
  • 50% or more of a plurality of bristles 15a, 16a adjacent to an optional bristle are arranged not to be contacted with the rounded tip 15b, 16b of the optional bristle (in other words, the heights of the bristles are arranged to be different).
  • the reason why this arrangement is necessary is that if, in adjacent to the optional bristle, there are a plurality of bristles 15a, 16a having the heights equal to that of the optional one, the rounded tips 15b and 16b are contacted with each other and the tips of the bristles 15a and 16a are spread.
  • each of the bristles 15a, 16a excepting the tips thereof is preferably set from 0,15 to 0,4 mm (6/1000 to 15/1000 inches). If it is less than 0,15 mm (6/1000 inches), the bristle 15a, 16a lacks stiffness and as a result, there is the fear that the force to be incurred to the teeth during the brushing operation is not effective as the force for removing the plaque and for massaging the gum portion. On the other hand, if it exceeds 0,4 mm (15/1000 inches), the bristles 15, 16b themselves become too stiff and a feel to the gum portion becomes unfavorable.
  • the diameters of the rounded tips 15b, 16b of the bristles 15a, 15b are set larger by about 1.1 to 2.5 times the diameters of the remaining portions (the portions excepting the tips) of the bristles 15, 16a, and preferably by about 1.2 to 2.0 times. If they are less than 1.1 times, they are substantially unchanged from the conventional toothbrush in which the rounded tips 15b, 16b are not formed and the effects are insufficient. On the other hand, if they exceed 2.5 times, the tips of the bristles are spread, thus providing an unsatisfactory appearance.
  • the configuration of the rounded tips 15b, 16b are not necessarily limited to a rounded shape but it may be an elliptical shape, a nail shape, a cubic shape having four rounded corners, etc.
  • the heights of the bristles 15a in the distal area 12a of the head portion 12 are set shorter than the heights of the bristles 16a in the basal area 12b of the head portion 12, the difference in length of the longest and shortest bristles in each bristle flock 15 is set within a range of from 1mm to 4mm, and the lengths of the bristles 15a in each bristle flock are irregularly set within the aforementioned range.
  • the bristles 15a do not become too stiff (lack of flexibility), the tips of the bristles 15a can easily enter between adjacent teeth where the plaque are difficult to be removed during the brushing operation, and the tip or tips of one or some of the bristles 15a in each bristle flock are readily contacted even with the innermost molars, thus enabling to eliminate non-brushed teeth and to effectively remove the plaque. Further, since the rounded portion 15b, 16b is provided to the tip of each bristles 15a, 16a, the plaque, for example, between the enameled part of each tooth and the upper edge of the gum portion can be scratched out while massaging the gum portion.
  • the heights of the bristles 16a in the basal area 12b of the head portion 12 are set longer than the heights of the bristles 15a in the distal area 12a and the average positions of the tips of the bristles of the respective bristle flocks 15, 16 on the entire head portion 12 are substantially flushed with each other, a feel of the use is good.
  • the head portion of a toothbrush of the present invention may be constituted in the manner as shown, for example, in Figs. 3 through 7, besides that of the embodiment shown in Fig. 4.
  • Fig. 5 it may be designed such that no rounded portion is provided to the tip of each of the bristles 15a, 16a and the tips of only the bristles 12a in each bristle flock 15 in the distal area 12a of the head portion 12 are irregularly set within a range of from 0.8mm to 4mm.
  • the tips of only the bristles 15a in each bristle flock 15 in the distal area 12a of the head portion 12 are irregularly set within a range from 0.8mm to 4mm and the tips of the bristles 15a are provided with a rounded portion 15b, respectively.
  • Fig. 7 it may also be designed such that the distal area 12a of the head portion 12 is bent to provide a step portion between the distal area 12a and the basal area 12b and the average positions of the tips of the bristles in the respective bristle flocks 15, 16 on the entire head portion 12 are substantially flushed with each other.
  • the head portion 12 is divided into three areas, namely, the distal area 12a, the basal area 12b and an intermediate area 12c and formed in three steps, and the average positions of the bristles of the respective bristle flocks 15, 16 are substantially flushed with each other.
  • the distal area 12a of the head portion 12 is inclined and the average positions of the bristles in the respective bristle flocks on the entire head portion 12 are substantially flushed with each other.
  • the heights of the bristles implanted in the distal area 12a of the head portion 12 are set shorter than the heights of the bristles 16a implanted in the basal area 12b of the head portion 12, the average positions of the bristles in the respective bristle flocks 15, 16 are substantially flushed with each other, the difference in length between the longest and the shortest bristles 15a in each bristle flock 15 in the distal area 12a is set within a range from 0.8mm to 4mm, and the lengths of the bristles 15a in each bristle flock 15 are irregularly set within the aforementioned range.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Brushes (AREA)

Claims (2)

  1. Zahnbürste mit:
    einem Griffabschnitt (1);
    einem Kopfabschnitt (2), der einstückig mit dem Griffabschnitt über einen Halsabschnitt (4) verbunden ist;
    Borstenelementen (3), die auf einer Seite des Kopfabschnittes eingesetzt sind, wobei der Kopfabschnitt in Richtung der Seite der Borstenelemente in bezug auf den Griffabschnitt und mehr als der Halsabschnitt gebogen ist,
    dadurch gekennzeichnet, daß
    die Länge des Kopfabschnittes im Bereich zwischen 10 mm bis 25 mm liegt, der Winkel (θ2) des Kopfabschnittes relativ zum Griffabschnitt innerhalb eines Bereichs von 7° bis 30° liegt, und der Winkel (θ1) des Kopfabschnitts relativ zum Halsabschnitt innerhalb eines Bereichs von 5° bis 15° liegt,
    die Höhe der Borsten, die am Ende (12a) des Kopfabschnittes eingesetzt sind, kürzer ist als die Höhe der Borsten, die im übrigen Bereich (12b) des Kopfabschnittes eingesetzt sind, wobei die mittlere Lage der Spitzen der Borsten in jedem einer Vielzahl von Borstenbündel, die im Endbereich eingesetzt sind, im wesentlichen mit der mittleren Position der Spitzen der Borsten, die in dem übrigen Bereich eingesetzt sind, übereinstimmt und wobei der Längenunterschied zwischen den höchsten Borsten und den niedrigsten Borsten in jedem Borstenbündel, der im Endbereich (12a) eingesetzt ist, im Bereich zwischen 0,8 mm bis 4 mm liegt und die Längen der Borsten in jedem Borstenbündel zufällig gewählt sind, und
    wobei der Unterschied zwischen der mittleren Höhe der Borsten, die im Endbereich des Kopfabschnittes eingesetzt sind und der mittleren Höhe der Borsten, die im übrigen Bereich des Kopfabschnitts eingesetzt sind, zumindest 0,5 mm beträgt und die mittlere Höhe der Borsten im Endbereich 10 mm oder weniger beträgt.
  2. Zahnbürste nach Anspruch 1, wobei die Spitze eines jeden Borstens, wie er zumindest im Endbereich des Kopfabschnittes eingesetzt ist, eine rundliche Form aufweist.
EP91113431A 1990-08-13 1991-08-09 Zahnbürste Expired - Lifetime EP0471312B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP85616/90U 1990-08-13
JP8561690U JP2545239Y2 (ja) 1990-08-13 1990-08-13 歯ブラシ
JP404900/90U 1990-12-26
JP40490090 1990-12-26

Publications (3)

Publication Number Publication Date
EP0471312A2 EP0471312A2 (de) 1992-02-19
EP0471312A3 EP0471312A3 (en) 1992-06-17
EP0471312B1 true EP0471312B1 (de) 1996-07-10

Family

ID=26426627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91113431A Expired - Lifetime EP0471312B1 (de) 1990-08-13 1991-08-09 Zahnbürste

Country Status (5)

Country Link
EP (1) EP0471312B1 (de)
CA (1) CA2048790A1 (de)
DE (1) DE69120741D1 (de)
HK (1) HK1001170A1 (de)
MY (1) MY109803A (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016571A1 (en) 1994-12-01 1996-06-06 The Procter & Gamble Company Toothbrush having extended bristles
GB9503706D0 (en) * 1995-02-24 1995-04-12 Lingner & Fischer Gmbh Toothbrush
DE19507364A1 (de) * 1995-03-03 1996-09-05 Coronet Werke Gmbh Bürste, insbesondere Hygienebürste
US5628082A (en) * 1995-03-22 1997-05-13 Colgate-Palmolive Company Toothbrush with improved efficacy
DE10164336A1 (de) 2001-12-28 2003-07-17 Trisa Holding Ag Triengen Zahnbürste und Verfahren zur Herstellung einer solchen Zahnbürste
DE10259723A1 (de) * 2002-12-19 2004-07-01 Trisa Holding Ag Zahnbürste und Verfahren zu deren Herstellung
DE10331369B4 (de) 2003-07-11 2010-09-16 Braun Gmbh Zahnbürste
GB0423423D0 (en) * 2004-10-22 2004-11-24 Dooley Peter Improvements in the design of toothbrushes
EP1661486A3 (de) * 2004-10-22 2006-08-23 Dr. Peter Dooley Verbesserungen am Entwurf von Zahnbürsten
KR101162574B1 (ko) * 2012-02-13 2012-07-05 박근갑 어금니 전용 칫솔
EP3445205B1 (de) 2016-04-20 2022-02-09 Trisa Holding AG Bürstenprodukt

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229318A (en) * 1964-05-15 1966-01-18 Sunbeam Corp Toothbrush
US4654922A (en) * 1985-05-28 1987-04-07 Chen Horng Y Brush with universal joints
US4670931A (en) * 1986-02-07 1987-06-09 Maliheh Abbassi Toothbrush
DE8612586U1 (de) * 1986-05-09 1986-08-07 Hiedl, Thomas, 8444 Straubing Zahnbürstenborsten
EP0274618A1 (de) * 1986-12-08 1988-07-20 Trisa Bürstenfabrik Ag Triengen Zahnbürste

Also Published As

Publication number Publication date
EP0471312A2 (de) 1992-02-19
MY109803A (en) 1997-07-31
EP0471312A3 (en) 1992-06-17
CA2048790A1 (en) 1992-02-14
HK1001170A1 (en) 1998-05-29
DE69120741D1 (de) 1996-08-14

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