EP3858187A1 - Brosse à dents - Google Patents

Brosse à dents Download PDF

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Publication number
EP3858187A1
EP3858187A1 EP20154733.8A EP20154733A EP3858187A1 EP 3858187 A1 EP3858187 A1 EP 3858187A1 EP 20154733 A EP20154733 A EP 20154733A EP 3858187 A1 EP3858187 A1 EP 3858187A1
Authority
EP
European Patent Office
Prior art keywords
toothbrush
brush
head
force
handle
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.)
Pending
Application number
EP20154733.8A
Other languages
German (de)
English (en)
Inventor
Dietrich GALLMETZER
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP20154733.8A priority Critical patent/EP3858187A1/fr
Publication of EP3858187A1 publication Critical patent/EP3858187A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/002—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions
    • A46B5/0033—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions bending or stretching or collapsing
    • A46B5/0037—Flexible resilience by plastic deformation of the material
    • 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 invention relates to a toothbrush.
  • Toothbrushes are known in various designs. In addition to electric toothbrushes, manual toothbrushes are still used for manual tooth cleaning. In many cases, manual toothbrushes of this type are even given preference over their electric counterparts from a dental perspective. In addition, manual toothbrushes are more robust, easier to manufacture, cheaper and can be used universally in difficult environmental conditions (for example without the possibility of electrical charging).
  • the object of the invention is to provide a toothbrush that is easy to manufacture and that is easier to clean, so that the teeth can be cleaned more comfortably and relaxed and, as a result, also more thoroughly than before.
  • excessive contact pressure of the bristles on the tooth surfaces and the gums should be avoided with the simplest possible means.
  • a toothbrush is provided with a brush holder having a brush handle and a brush neck and with a brush head adjoining the brush neck, the shape and material of the brush holder being such that an elastic deflection of the brush head relative to the brush handle by a degressive force / path Characteristic curve is characterized.
  • the invention is based on the consideration that, with regard to handling, ergonomics that are perceived as pleasant are to be aimed for, which in a sense automatically guides the user to the correct tooth cleaning technique. Excessive contact pressure of the bristles on the tooth surfaces and the gums should be avoided due to the design. According to the invention, this is achieved in a surprisingly simple manner, even without complex sensors and without active control elements, in that a degressive force / displacement characteristic is set in a targeted manner through the combination of shape and material properties in the handle and neck area of the brush holder.
  • the force / displacement characteristic curve preferably has an approximately linear profile corresponding to a rigidity of approximately 1 N / mm.
  • the force / displacement characteristic advantageously has a saturating course, which is preferably set such that a deflection of 20 mm corresponds to a force of 10N.
  • the brush holder including a head plate molded onto the brush neck is produced integrally as an injection-molded component from a plastic, in particular a biodegradable plastic.
  • a plastic in particular a biodegradable plastic.
  • it preferably has an elongated S-shaped contour, the brush head preferably being located below the brush handle, preferably offset parallel to it.
  • the brush head of the toothbrush preferably has a bristle package with a large number of bristle tufts, each bristle tuft being composed of at least 100, preferably more than 120 and particularly preferably 140 filaments.
  • each bristle tuft being composed of at least 100, preferably more than 120 and particularly preferably 140 filaments.
  • tufts of bristles are present, which are anchored in associated recesses or depressions in the head plate.
  • the individual filaments are preferably made of polyester, in particular polybutylene terephthalate (PBT), but other plastics, in particular polyamide, can also be used.
  • PBT polybutylene terephthalate
  • the cleaning surface formed by them is preferably flat.
  • the toothbrush 2 shown in the figures is a manual toothbrush for manual tooth brushing.
  • the toothbrush 2 has a side view according to FIG FIG. 2 in the manner of an elongated S curved brush holder 4, which comprises a brush handle 6 and a brush neck 8, the brush neck 8 at the end carrying a head plate 10 of a brush head 12.
  • the brush handle 6 merges continuously and steadily into the brush neck 8, which in turn merges continuously and steadily into the head plate 10.
  • the head plate 10 serves as a carrier for toothed bristles or bristles 14 for short;
  • the toothbrush 2 is grasped and held by the user on the brush handle 6, and the brush neck 8 represents, so to speak, an intermediate section or an intermediate part between the brush head 12 and the brush handle 6.
  • the contours of the brush holder 4 including the molded head plate 10 are preferably smooth and ergonomically rounded, optionally with two rounded longitudinal edges 16 on the underside of the brush neck 8, as in the perspective illustration according to FIG FIG. 6th evident.
  • the brush head 12 has an essentially rectangular head plate 10 with rounded corners, which serves as a carrier for bristles 14.
  • the entirety of the bristles 14 forms an approximately cuboid bristle package 18 or bristle field which extends above the head plate 10.
  • the bristle package 18 is composed of a preferably regular arrangement of tufts of bristles 20, which are anchored in associated depressions or holes on the top of the head plate 10.
  • the tufts of bristles 20 are in turn composed of a large number of individual bristles 14 or filaments.
  • the totality of all the bristles 14 or filaments defines at their free ends a cleaning surface 22 which comes into contact with the teeth and / or the gums during use.
  • the bristles 14 are very important for caries and periodontal prophylaxis. They are preferably made of polyester, in particular polybutylene terephthalate (PBT), or of polyamide or another plastic and are preferably very fine, namely only 0.1 millimeter or less in diameter. They are advantageously rounded at their free ends.
  • PBT polybutylene terephthalate
  • Each of the bristle tufts 20 preferably has more than 100 individual filaments.
  • the number of tufts of bristles 20 is preferably in the range from 35 to 45.
  • the tufts of bristles 20 are shown in FIG FIG. 1 preferably distributed in a regular, grid-like arrangement on the top plate 10.
  • the bristle package 18 has a total of 5,460 individual filaments, namely 140 filaments for each of the 39 tufts of bristles 20 (corresponding to 39 holes in the head plate 10), and they are close together. This results in a particularly efficient cleaning surface 22.
  • the top plate 10 in the plan view according to FIG. 1 protrudes laterally only slightly beyond the bristle package 18 and is flat, the overall dimensions of the brush head 12 are only insignificantly larger than those of the bristle package 18. Overall, a particularly small, compact brush head 12 is realized.
  • the ultra-compact brush head 12 when brushing teeth to reach those places in the mouth that are difficult to reach with conventional toothbrushes, namely behind the upper molars, for example, as well as the insides of the upper and lower front teeth.
  • the ultra-compact brush head 12 also assists in placing the cleaning surface 22 at an angle when brushing your teeth, half on the gum, half on the tooth, as in FIG FIG. 7th shown schematically.
  • the ergonomically shaped handle helps to carry out the generally recommended cleaning movement with small, fine circles and, if possible, without pressure.
  • the brush head 12 is lower than the brush handle 6 due to the S-shaped curve of the brush holder 4.
  • the plane in which the preferably flat cleaning surface 22 lies is parallel to the plane of the head plate 10, and this is arranged parallel (but offset in height) to the plane in which the central region of the brush handle 6 lies.
  • the width of the brush holder 4 is narrowest approximately in the middle of the brush neck 8 and increases somewhat towards both the brush head 12 and the brush handle 6, the brush handle 6 being wider at the widest point than the head plate 10 of the brush head 12.
  • the widest point of the brush handle 6 is in its central region, roughly in the middle. Towards the preferably rounded end facing away from the brush head 12, the brush handle 6 becomes somewhat narrower again.
  • the height or thickness of the brush holder 4 is lowest in the area of the brush neck 8 and increases somewhat towards the top plate 10. It also increases towards the brush handle 6, reaches the greatest value in its central region and decreases again somewhat towards the end facing away from the head.
  • the distance a is the height between the plane of the cleaning surface 22 and the plane of the underside of the brush handle 6 in the side view according to FIG FIG. 2 .
  • the total length of the toothbrush 2 from the head end to the handle end in the projection (top view) according to FIG. 1 is preferably approx. 185 mm.
  • the total height of the toothbrush 2 in the side view according to FIG. 2 from the lowest point (bottom of the head plate 10) to the highest point (top of the brush handle 6) is preferably about 40 mm.
  • the shape and the flowing contours of the brush handle 6 are chosen so that the gripping hand is relaxed by pressure points and the force is transmitted smoothly and gently to the ultra-compact brush head 12 with its narrow and fine bristle field when brushing your teeth.
  • the toothbrush 2 has many mutually coordinated and flowing cross-sections combined in one ergonomic design item.
  • the handle with its ergonomic design also ensures that the toothbrush 2, as already mentioned, is applied almost automatically at the correct angle, namely slightly inclined, half on the gum and half on the tooth, so that the gum line is also cleaned gently and effectively ( see. FIG. 7th ).
  • teeth and inflamed gums damaged by contact pressure resulting from the use of conventional toothbrushes are spared and can thus recover.
  • FIG. 9 shows how the force / displacement characteristic is defined within the framework of a structural mechanical simulation model (finite element method).
  • the toothbrush 2 is guided between the two rollers R acting in the area of the brush handle 6 and the vertical plane E along the brush head 12. Between these contact bodies, which represent rigid body boundary conditions, it can move freely - apart from symmetry conditions, which also have an effect.
  • the load is applied by infeed of the (horizontal) plane Z, which is pressed onto the bristle package 18 with a constant advance (path-controlled). With the reaction force of this level Z, the force / displacement behavior of the toothbrush 2 can be evaluated and made available as a force / displacement characteristic.
  • a direct metrological acquisition on the real object is analogous.
  • the force / displacement characteristic shown characterizes the rigidity of the toothbrush 2, in particular of the brush holder 4. It describes the resistance of the brush holder 4 to elastic deformation by an external force.
  • the force is plotted in the diagram as a function of the path (deflection).
  • the force / displacement curve is degressive, with an approximate stiffness of 1 N / mm for the first 5 mm deflection or displacement. There is therefore an approximately linear (straight) curve progression for small distances. The curve then flattens out and the maximum force of approx. 10 N is reached with a path of approx. 20 mm. The stresses remain below the yield stress up to a deflection of approx. 20 mm, after which the linear elastic range of the material is exceeded.
  • Degressive behavior ideally means that the characteristic curve for an increasing argument (here: deflection or path) increases monotonically, but that its slope decreases.
  • the force / distance characteristic flattens out here in the example for increasing distances and merges into a horizontal straight line (constant or limit value).
  • the brush holder 4 including the head plate 10 is preferably manufactured integrally (in one piece) from a plastic, preferably by an injection molding process, in particular with only one component (1K injection molding).
  • high HDT high heat resistance
  • the commercially available has proven to be particularly suitable highlighted the plastic available under the product name ESTABIO PL 0640 T05, which is also biodegradable.

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  • Brushes (AREA)
EP20154733.8A 2020-01-30 2020-01-30 Brosse à dents Pending EP3858187A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20154733.8A EP3858187A1 (fr) 2020-01-30 2020-01-30 Brosse à dents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20154733.8A EP3858187A1 (fr) 2020-01-30 2020-01-30 Brosse à dents

Publications (1)

Publication Number Publication Date
EP3858187A1 true EP3858187A1 (fr) 2021-08-04

Family

ID=69423074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20154733.8A Pending EP3858187A1 (fr) 2020-01-30 2020-01-30 Brosse à dents

Country Status (1)

Country Link
EP (1) EP3858187A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19643019C1 (de) * 1996-10-18 1998-04-16 Georg Wiegner Zahnbürste
WO2011084116A1 (fr) * 2009-12-18 2011-07-14 Colgate-Palmolive Company Brosse à dents à aménagement d'éléments de nettoyage en boucle fermée
USD764177S1 (en) * 2014-07-31 2016-08-23 Colgate-Palmolive Company Oral care implement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19643019C1 (de) * 1996-10-18 1998-04-16 Georg Wiegner Zahnbürste
WO2011084116A1 (fr) * 2009-12-18 2011-07-14 Colgate-Palmolive Company Brosse à dents à aménagement d'éléments de nettoyage en boucle fermée
USD764177S1 (en) * 2014-07-31 2016-08-23 Colgate-Palmolive Company Oral care implement

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