EP4013265B1 - Brosse dotée d'une touffe de poils fixée au moyen de pinces, et fil permettant la production de telles pinces - Google Patents

Brosse dotée d'une touffe de poils fixée au moyen de pinces, et fil permettant la production de telles pinces Download PDF

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Publication number
EP4013265B1
EP4013265B1 EP20749814.8A EP20749814A EP4013265B1 EP 4013265 B1 EP4013265 B1 EP 4013265B1 EP 20749814 A EP20749814 A EP 20749814A EP 4013265 B1 EP4013265 B1 EP 4013265B1
Authority
EP
European Patent Office
Prior art keywords
structural elements
clip
wire
disposed
matrix
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.)
Active
Application number
EP20749814.8A
Other languages
German (de)
English (en)
Other versions
EP4013265A1 (fr
Inventor
Tobias Noethe
Waldemar Schroeder
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.)
Berkenhoff and Co KG
Original Assignee
Berkenhoff and Co KG
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
Application filed by Berkenhoff and Co KG filed Critical Berkenhoff and Co KG
Publication of EP4013265A1 publication Critical patent/EP4013265A1/fr
Application granted granted Critical
Publication of EP4013265B1 publication Critical patent/EP4013265B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/16—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by wires or other anchoring means, specially for U-shaped bristle tufts
    • 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
    • A46D1/0207—Bristles characterised by the choice of material, e.g. metal
    • 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 brush with a carrier made of a plastically deformable plastic material for arranging tufts of bristles, the carrier having a plurality of tuft holes, each of which serves to accommodate a tuft of bristles, the tufts of bristles each being fastened in a tuft hole by means of a clamp, the clamps having a length which is greater than the diameter of the tuft hole for forming clamp projections formed at both longitudinal ends, and the clamps being provided with structural elements at least in the region of the projections on at least one longitudinal side arranged substantially parallel to a tuft hole axis, which are formed discontinuously in the longitudinal direction of the clamp, the clamp projections provided with the structural elements being pressed into the plastic material of the carrier for embedding in order to fasten the tufts of bristles.
  • the invention further relates to a wire for forming clamps for such a brush.
  • Brushes are known in a wide variety of designs and for a wide variety of purposes. Regardless of the design and purpose, brushes have tuft holes in which the bristle tufts are fixed in place for arranging bristle tufts. It is known, in particular, from toothbrushes to arrange the bristle tufts in tuft holes that are formed in a carrier made of a plastically deformable plastic material.
  • the bristle tufts are attached in the tuft holes by means of a wire clip that is longer than the diameter of the tuft hole to form clip projections and is pressed into the material of the carrier with the clip projections formed at its longitudinal ends, so that the bristle tufts are fixed in the carrier in a force-fitting and form-fitting manner by means of the clip extending through the brush hole.
  • the known surface structure with the crystal-like material projections of the brackets resulting from the crossing arrangement of the diagonal grooves extends into the long edges of the bracket, so that in particular the bracket edge that hits the carrier material during the pressing-in process of the brackets does not have a continuous thickness, but rather thickenings formed by the material projections, which lead to an increase in the pressing-in forces. Due to the increased pressing-in forces, a correspondingly kink-proof dimensioning and thus an increased use of material for the bracket is required in order to prevent buckling during the pressing-in process and thus component failure. Both the increased pressing-in forces and the increased use of material lead to an increase in manufacturing costs.
  • the present invention is based on the object of proposing a brush of the type mentioned at the beginning, which enables more cost-effective production.
  • the brush according to the invention has the features of claim 1.
  • the structural elements are arranged at a distance from the longitudinal edges of the clip, so that the formation of a continuous cutting edge on the longitudinal edges of the clip is possible, which facilitates the pressing process for embedding the clip projections in the material of the carrier, so that lower pressing forces are required when producing the brush.
  • the reduction in pressing forces enables a correspondingly reduced dimensioning of the clips, so that the manufacturing costs of the brush can also be reduced by the reduced use of material.
  • the advantageous effect of the invention also occurs when individual structural elements have no edge spacing, as long as the majority of the structural elements are arranged at a distance from the longitudinal edges of the bracket.
  • the structural elements are designed as either an elevation or a depression relative to a flat base area of the long side.
  • the structural elements according to the invention have both an indentation and an elevation relative to a flat base area of the long side, an increase in the extraction force can be achieved compared to a design of the structural elements which are designed as an elevation or a depression relative to a flat base area.
  • This increase in the extraction force can also be achieved in particular if the structural elements extend to the longitudinal edges of the Clamp so that the advantageous effect of increasing the extraction forces can be achieved regardless of whether the structural elements are arranged at a distance from the longitudinal edges of the clamp.
  • the recess at least partially surrounds the elevation, so that the ideally concentric arrangement of the recess and the elevation of one and the same structural element creates a particularly effective anchoring, wherein the elevation creates a material projection relative to the recess, which only partially, namely the projection of the elevation over the flat base surface, increases the thickness of the clip, which affects the level of the pressing force.
  • This advantageous effect is particularly effective when the elevation is surrounded by the depression like a trench.
  • the clip projections formed on the clip each have a structural element matrix with at least two structural elements arranged in a matrix column, so that it is ensured that the advantageous effect of discontinuously formed structural elements can be achieved multiple times in the clip projections.
  • the distance between two structural elements arranged in the matrix column is dimensioned such that a structural element arranged in an adjacent matrix column at least partially protrudes into a gap formed by the distance, a particularly effective arrangement of the structural elements is made possible.
  • the long side of the clip in the area of the clip projections is covered by more than 50% of the structural elements. A design of the brush that is particularly reproducible with regard to the anchoring effect or the level of the pull-out force is possible if the structural elements are designed to match.
  • the wire according to the invention which enables a more cost-effective production of the brush, has the features of claim 8.
  • the structural elements are arranged at a distance from the longitudinal edges.
  • the structural elements are designed as elevations or depressions compared to a flat base surface of the long side.
  • the structural elements are arranged on the flat base surface of the longitudinal side and have both a depression and an elevation relative to the base surface, wherein the advantageous effect achieved thereby of a mutual anchoring of a clamp designed in this way, embedded in the material of the carrier of a brush and produced from the wire according to the invention by cutting to length, can also be achieved independently of whether the structural elements are arranged at a distance from the longitudinal edges of the clamp.
  • the recess at least partially surrounds the elevation.
  • the elevation is surrounded by the depression like a trench.
  • the structural elements are arranged in a structural matrix, wherein the distance between two structural elements arranged in a matrix column is dimensioned such that a structural element arranged in an adjacent matrix column at least partially protrudes into a gap formed by the distance, so that a particularly high density of the structural elements is made possible.
  • the structural elements are designed to match, wherein it is particularly preferred if the structural elements are arranged over the are distributed along the entire length, so that the formation of
  • Clamps for attaching tufts of bristles and brush supports can be made by cutting pieces of wire to any length at any point along the wire.
  • the structural elements are arranged evenly spaced in matrix columns and matrix rows of the structural matrix.
  • the longitudinal side of the wire is covered by more than 50% of the structural elements.
  • Fig.1 shows a toothbrush 10 which has a brush head at one end of a toothbrush body opposite a handle 11 as a carrier 12 for a plurality of bristle tufts 13.
  • At least the brush head designed as a carrier 12 is made of a plastically deformable plastic material and has, as in particular in Fig.2 shown, a number of tuft holes 14 corresponding to the number of bristle tufts 12, into which, as in particular the Fig. 3 and 4 show that bristle tufts 13, each consisting of a plurality of substantially parallel-aligned bristles or filaments, are inserted and secured.
  • the bristle tuft 13 is attached in the tuft hole 14 such that the bristle tuft 13, originally designed as a straight bristle strand, is guided around a lower longitudinal edge 18 of the clamp 16 in such a way that two opposing tuft legs 19, 20 rest against two opposing longitudinal sides 21, 22 of the clamp 16 and the clamp 16, which has a clamp length l which is greater than the diameter D of the tuft hole 14 with a Fig.3 is introduced into the tuft hole 14 with the pressing force E shown, whereby due to the length l of the clamp 16 being greater than the diameter D, clamp projections 23, 24 are pressed into the plastic material 15 of the carrier 12 delimiting the tuft hole 14 until a tuft base 25 resting on the lower longitudinal edge 18 of the clamp 16 rests on a bottom 26 of the tuft hole 14.
  • FIG.8 As illustrated, due to the pressing process in the plastic material 25 of the carrier 12, an incision 28 is formed by the clip projections 23, 24 corresponding to the path that the clip projections 23, 24 travel in the plastic material of the carrier 12, whereby the lower longitudinal edge 18 forms a cutting edge 27 and the plastic material is displaced by the clip projections 23, 24.
  • the plastic deformability of the plastic material leads to a flow of the displaced plastic material in the area of the clip projections 23, 24 with the cutting flanks 29 formed by the incision 28 nestling against the longitudinal sides 21, 22 of the clip 16 provided with structural elements 30.
  • the opposite longitudinal sides 21, 22 are provided with structural elements 30 in such a way that, in particular, at the longitudinal ends 37, 38 of the clamp 16, which in the case of the embodiment described with reference to the Fig. 3 and 4 described pressing process, the clip projections 23, 24 form a structural element matrix 31 with two structural elements 30 arranged in a matrix column 32 and a structural element matrix 39 with three structural elements 30 arranged in a matrix column 32.
  • the structural elements 30 are also arranged distributed over the entire longitudinal sides 21, 22, wherein the structural elements 30 are evenly spaced in the matrix columns 32 and in matrix rows 33.
  • the distance a between adjacent matrix columns 32 is dimensioned such that a structural element 30 arranged in an adjacent matrix column 32 protrudes at least partially into an intermediate space 34 formed by the distance b of the structural elements within a matrix column 32.
  • the long sides of the bracket 16 each have a flat base surface 50 on which the structural elements 30 are arranged, each structural element 30 having both a recess 35 and an elevation 36 relative to the base surface 34.
  • the elevation 36 is also surrounded by the recess 35 in a trench-like manner.
  • Fig.8 shows, due to the flow behavior of the plastic material in interaction with the structural element matrix 39 formed in the area of the clip projection 23 with structural elements 30 arranged on each long side 21, 22 in a matrix column 32, an interlocking engagement between the clip projection 23 and the adjacent plastic material of the carrier 12 results, such that the plastic material 25 protrudes into the depressions 35 of the structural elements 30 and the elevations 36 of the structural elements 30 protrude into the plastic material 25 of the carrier 12. Due to this mutual engagement between the clip projection 23 and the plastic material of the carrier, a particularly durable connection is obtained between the clip 16 and the carrier 12, which can only be separated with particularly high pull-out forces.
  • the structural elements 30 are arranged at a distance s from the lower longitudinal edge 18, which - as stated above - forms a cutting edge 27, so that the cutting edge 27 has a smaller edge thickness t S than the greater width t K of the clamp 16 caused by the projection h of the elevations 36 relative to the base area 34.
  • comparatively lower pressing forces have to be applied at the beginning of the pressing-in process described above than if the structural elements were arranged without a distance from the lower longitudinal edge 18, so that the thickness of the cutting edge 37 formed on the lower longitudinal edge 18 would correspond to the width of the clamp 16.
  • a clamp 40 is shown which is provided with structural elements 42 arranged in a matrix arrangement 41 on opposite longitudinal sides 43, 44, wherein, in further accordance with the clamp 16, a distance s is formed between the structural elements 42 and longitudinal edges 45, 46.
  • the structural elements 42 have a recess 47 and an elevation 48 relative to a base surface 49, wherein the elevation 48 in the present case is pyramid-shaped.
  • Both the structural elements 30 on the long sides 21, 22 of the Fig.9 Both the structural elements 42 on the longitudinal sides 43, 44 of a wire 15 shown in FIG. 1, which serves to produce clamps 16, and the structural elements 42 on the longitudinal sides 43, 44 of a wire which serves to produce clamps 40, can be produced in a simple rolling process in which a wire provided with a smooth surface on the longitudinal sides is guided through a rolling gap formed between two embossing rollers.

Landscapes

  • Brushes (AREA)

Claims (14)

  1. Brosse comprenant des touffes de poils et un support (12) en matériau plastique déformable plastiquement pour l'agencement des touffes de poils (13), le support (12) ayant une pluralité de trous de touffe (14) servant chacun à loger une touffe de poils (13), les touffes de poils (13) étant fixées chacune dans un trou de touffe (14) au moyen d'un clip (16, 40), les clips (16, 40) ayant une longueur l supérieure au diamètre D du trou de touffe (14) de sorte à former des saillies de clip (23, 24) formées aux deux extrémités longitudinales (37, 38), et les clips (16, 40) étant munis d'éléments structurels (30, 42) discontinus au moins dans la région des saillies de clip (23, 24) sur au moins un côté longitudinal (21, 22 ; 43, 44) disposé essentiellement parallèle à un axe de trou de touffe, les saillies de clip (23, 24) munies des éléments structurels (30, 42) étant poussées dans le matériau plastique du support (12) afin d'être encastrées de sorte à fixer les touffes de poils (13), les éléments structurels (30, 42) étant disposés à une distance des bords longitudinaux (18, 46, 47) du clip (16, 40), caractérisée en ce que
    les éléments structurels (30, 42) ont un creux (35, 47) ainsi qu'un sommet (36, 48) par rapport à une surface de base (50, 49) du côté longitudinal (21, 22 ; 43, 44), le creux (35, 47) entourant au moins partiellement le sommet (36, 48).
  2. Brosse selon la revendication 1,
    caractérisée en ce que
    le sommet (36, 48) est entouré par le creux (35, 47) à la façon d'un fossé.
  3. Brosse selon l'une quelconque des revendications précédentes, caractérisée en ce que
    les saillies de clip (23, 24) formées sur le clip (16, 40) ont chacune une matrice d'éléments structurels (31, 39) comprenant au moins deux éléments structurels (30, 42) disposés dans une colonne de matrice (32).
  4. Brosse selon la revendication 3,
    caractérisée en ce que
    les éléments structurels (30) ont une longueur dans la direction longitudinal direction du clip (16) qui est inférieure à la longueur des saillies de clip (23, 24).
  5. Brosse selon la revendication 3 ou 4,
    caractérisée en ce que
    la distance b entre deux éléments structurels (30) disposés dans la colonne de matrice (32) est dimensionnée de telle manière qu'un élément structurel (30) disposé dans une colonne de matrice (32) adjacente fait saillie au moins partiellement dans un espace (34) formé par la distance b.
  6. Brosse selon l'une quelconque des revendications précédentes, caractérisée en ce que
    plus de 50 % du côté longitudinal (21, 22) du clip (16) est recouvert des éléments structurels (30) dans la région des saillies de clip (23, 24).
  7. Brosse selon l'une quelconque des revendications précédentes, caractérisée en ce que
    les éléments structurels (30, 42) sont identiques.
  8. Fil (15) pour former des clips (16) pour une brosse selon l'une quelconque ou plusieurs des revendications 1 à 7, le fil (15) ayant des éléments structurels (30) sur au moins un de deux côtés longitudinaux (21, 22) opposés qui s'étendent entre deux bords longitudinaux (18) du fil, les éléments structurels (30) étant discontinus et disposés à une distance des bords longitudinaux (18) du fil (15), caractérisé en ce que
    les éléments structurels (30) ont un creux (35) ainsi qu'un sommet (36) par rapport à une surface de base (50), le creux (35) entourant au moins partiellement le sommet (36).
  9. Fil selon la revendication 8,
    caractérisé en ce que
    le sommet (36) est entouré par le creux (35, 47) à la façon d'un fossé.
  10. Fil selon l'une quelconque des revendications 8 ou 9,
    caractérisé en ce que
    les éléments structurels (30) sont disposés dans une matrice d'éléments structurels (31), la distance b entre deux éléments structurels (30) disposés dans une colonne de matrice (32) étant dimensionnée de telle manière qu'un élément structurel (30) disposé dans une colonne de matrice (32) adjacente fait saillie au moins partiellement dans un espace (34) formé par la distance b.
  11. Fil selon l'une quelconque des revendications 8 à 10,
    caractérisé en ce que
    les éléments structurels (30) sont identiques.
  12. Fil selon l'une quelconque des revendications 8 à 11,
    caractérisé en ce que
    les éléments structurels (30) sont distribués sur le côté longitudinal (21, 22) entier.
  13. Fil selon l'une quelconque des revendications 10 à 12,
    caractérisé en ce que
    les éléments structurels (30) sont disposés à intervalles réguliers dans des colonnes de matrice (32) et des lignes de matrice (33) de la matrice d'éléments structurels (31).
  14. Fil selon l'une quelconque des revendications 8 à 13,
    caractérisé en ce que
    plus de 50 % du côté longitudinal (21, 22) du fil (15) est recouvert des éléments structurels (30).
EP20749814.8A 2019-08-12 2020-07-13 Brosse dotée d'une touffe de poils fixée au moyen de pinces, et fil permettant la production de telles pinces Active EP4013265B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019121693.1A DE102019121693A1 (de) 2019-08-12 2019-08-12 Bürste mit mittels Klammern befestigten Borstenbüschel sowie Draht zur Herstellung derartiger Klammern
PCT/EP2020/069771 WO2021028139A1 (fr) 2019-08-12 2020-07-13 Brosse dotée d'une touffe de poils fixée au moyen de pinces, et fil permettant la production de telles pinces

Publications (2)

Publication Number Publication Date
EP4013265A1 EP4013265A1 (fr) 2022-06-22
EP4013265B1 true EP4013265B1 (fr) 2024-06-19

Family

ID=71894778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20749814.8A Active EP4013265B1 (fr) 2019-08-12 2020-07-13 Brosse dotée d'une touffe de poils fixée au moyen de pinces, et fil permettant la production de telles pinces

Country Status (10)

Country Link
US (1) US20220287445A1 (fr)
EP (1) EP4013265B1 (fr)
JP (1) JP7514914B2 (fr)
KR (1) KR20220047287A (fr)
CN (1) CN114222512A (fr)
BR (1) BR112022001762A2 (fr)
CA (1) CA3149570A1 (fr)
DE (1) DE102019121693A1 (fr)
MX (1) MX2022001575A (fr)
WO (1) WO2021028139A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023102621A1 (de) 2023-02-02 2024-08-08 Gb Boucherie Nv Verfahren und Vorrichtung zum Stopfen einer Bürste

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2145480C1 (ru) * 1995-06-12 2000-02-20 Энкор Эдвенст Продактс, Инк. Щетка с улучшенным креплением пучков, многосторонняя анкерная проволока для изготовления скоб для крепления пучков щетинок в отверстиях для пучка, выполненных в щетках, и способ надежного крепления щетинок к щеткам
GB9613724D0 (en) * 1996-06-28 1996-08-28 Procter & Gamble A brush
US5724697A (en) * 1996-08-02 1998-03-10 Colgate-Palmolive Company Toothbrush construction
GB9809079D0 (en) * 1998-04-28 1998-06-24 Wisdom Toothbrushes Limited Brush
JP2001309818A (ja) * 2000-04-28 2001-11-06 Lion Corp ブラシ
US20060242779A1 (en) * 2005-04-28 2006-11-02 Accurate Wire, Inc. Brush with stapled tufts
MY156022A (en) * 2009-07-01 2015-12-31 Colgate Palmolive Co Toothbrush having improved tuft retention and anchor wire
US8402591B2 (en) * 2009-07-01 2013-03-26 Colgate-Palmolive Company Toothbrush having improved tuft retention and anchor wire
RU2472404C1 (ru) * 2009-07-01 2013-01-20 Колгейт-Палмолив Компани Зубная щетка с улучшенной фиксацией пучков и фиксирующей проволокой
JP6906313B2 (ja) 2017-01-17 2021-07-21 ライオン株式会社 歯ブラシ

Also Published As

Publication number Publication date
JP2022544661A (ja) 2022-10-20
MX2022001575A (es) 2022-05-24
WO2021028139A1 (fr) 2021-02-18
US20220287445A1 (en) 2022-09-15
DE102019121693A1 (de) 2021-02-18
KR20220047287A (ko) 2022-04-15
EP4013265A1 (fr) 2022-06-22
CN114222512A (zh) 2022-03-22
CA3149570A1 (fr) 2021-02-18
JP7514914B2 (ja) 2024-07-11
BR112022001762A2 (pt) 2022-03-22

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