EP1075806A1 - Verbesserte Zahnbürste mit auswechselbarem Bürstenträger und Herstellungsverfahren - Google Patents

Verbesserte Zahnbürste mit auswechselbarem Bürstenträger und Herstellungsverfahren Download PDF

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Publication number
EP1075806A1
EP1075806A1 EP00117179A EP00117179A EP1075806A1 EP 1075806 A1 EP1075806 A1 EP 1075806A1 EP 00117179 A EP00117179 A EP 00117179A EP 00117179 A EP00117179 A EP 00117179A EP 1075806 A1 EP1075806 A1 EP 1075806A1
Authority
EP
European Patent Office
Prior art keywords
slider
head
elastic
insert
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.)
Granted
Application number
EP00117179A
Other languages
English (en)
French (fr)
Other versions
EP1075806B1 (de
Inventor
Eligio Ponzini
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.)
Ponzini SpA
Original Assignee
Ponzini SpA
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 IT99MI001806 external-priority patent/IT1313135B1/it
Priority claimed from IT2000MI001099A external-priority patent/IT1318525B1/it
Application filed by Ponzini SpA filed Critical Ponzini SpA
Publication of EP1075806A1 publication Critical patent/EP1075806A1/de
Application granted granted Critical
Publication of EP1075806B1 publication Critical patent/EP1075806B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers
    • A46B7/042—Clip or snap connection for bristle carriers
    • 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 with an interchangeable head and a method for the manufacture thereof.
  • toothbrushes with an interchangeable head of different shapes and types have existed on the market, said toothbrushes being designed with the fundamental aim of providing a device for oral hygiene and for cleaning teeth which has advantageous ecological and cost-related features since it allows replacement of only the portion which is subject to wear, thereby helping reduce maintenance costs and the impact on the environment.
  • the replaceable portion correspondingly has different shapes and size coinciding, in some cases, with the head and a neck portion of the toothbrush and, in other cases, with a much smaller part of the toothbrush.
  • the smaller the replaceable portion the greater the problems relating to solidity of the assembly, while the bigger the replaceable portion, the more difficult it is to achieve an advantageous result in terms of cost efficiency.
  • a device of this type is known, for example, from European patent application EP-A-870,440 in the name of the same Applicants, in which the head is engaged on the toothbrush in a transverse direction with respect to its longitudinal axis.
  • US-5,471,701 and WO98/01055 illustrate other embodiments in which the head is engaged in a parallel direction with respect to the longitudinal axis of the toothbrush.
  • the assembly and release operations are not always convenient and easy.
  • the fastening means must be safer in order to prevent accidental separation of the bristled head.
  • the object of the present invention is therefore that of solving the abovementioned problems.
  • a toothbrush with an interchangeable head in which the bristled insert can be engaged in its seat with extreme ease and in which there are fastening means which ensure a firm connection and allow disengagement of the insert only upon a voluntary and active action by the user.
  • it is intended to provide a toothbrush with an interchangeable head in which an elastic action ensuring a firm connection is exerted by a mass of elastomer material which can be easily obtained during the toothbrush moulding process.
  • this toothbrush is also intended to provide a method for manufacturing this toothbrush, which is able to exploit fully the intrinsic characteristics of various materials so as to obtain a toothbrush with an optimum functioning capacity by means of a simple, rapid and low-cost production cycle.
  • a toothbrush is composed, in a manner known per se, of a handle body 1, a connecting neck 2 and a head 3.
  • the head 3 is configured so as to form a housing 3a into which a bristled insert or head-piece 4 can be engaged.
  • the head-piece 4 is the working part of the toothbrush, intended to perform the brushing action inside the oral cavity, and is the part which, due to greater wear, must be replaced most frequently.
  • a plurality of bristles S are embedded in the insert 4 using any of the known techniques, for example by means of anchoring pieces or using the known "in-moulding" technology.
  • the head-piece 4 can be inserted precisely, but with a minimum of play, into the housing 3a and is firmly fixed therein by holding means partly arranged on the head-piece and partly on the remaining portion of the toothbrush.
  • the holding means comprise, on the one hand, a detent or rib 4a which is formed at the front end of the head-piece 4 and can be engaged in a corresponding seat 3b in the head 3; on the other hand, the rear end of the head-piece 4 is provided with another detent or hook 4b which can be engaged with one locking end 6 of a slider 7.
  • the slider 7 is slidable between two positions, i.e. a locked position and disengaged position, illustrated in Figs. 3 and 4.
  • a locked position the end 6 of the slider 7 is engaged (Fig. 3) with the detent 4b of the head-piece: the latter thus remains positively locked inside the seat 3a by means of the detents 4a and 4b which, owing to their size and arrangement, do not allow any separation of the head-piece, even following accidental deformation of the head 3 resulting from pressure of the fingers or during the brushing action.
  • the disengaged position (Fig. 4)
  • the slider 7 is displaced backwards, as indicated by the arrow D, and therefore releases the detent 4b, allowing expulsion of the head-piece 4 by means of rotation (arrow R) about the detent 4a.
  • the slider is guided during its sliding movement inside the neck 2 of the toothbrush and may be easily operated from the outside by means of a lever or projection 7a with a simple pulling action performed using a finger.
  • the slider is kept actively in its locked position by means of the thrust exerted thereon by an elastic means such as, for example, a compression spring or a rubber plug.
  • a bottom end 7b of the slider rests against a mass of elastic/rubbery or elastomer material G which exerts, on the slider, a continuous pressure into the locked position. Therefore, in order to disengage the head-piece from the seat 3a, it is required to exert a positive and voluntary action on the projection 7a, overcoming the elastic reaction of the mass G and therefore providing that active safety against accidental separation of the head-piece, which has been long sought after.
  • the elastic mass G' is arranged directly in contact with the projection 7a: in this case, the mass G' of elastic material has the further aim of closing and providing a finish for the sliding seat 8 of the projection 7a.
  • the sliding seat 8 is wider than the corresponding seat in the embodiment according to Figs. 2, 3 and 4.
  • the engagement travel of the slider on the detent 4b of the head-piece 4 is sufficient, on one hand, to ensure perfect locking even in the case where the housing or the neck of the toothbrush are deformed owing to the pressure exerted by a user during use and, on the other hand, to establish the correct deformation of the elastic mass G or G' so as to obtain the desired level of elastic reaction.
  • the travel of the slider may be, for example, 1 mm.
  • the length and the shape of the slider 7 may be varied depending on the configuration of the handle 1 used, although they constitute secondary aspects compared to the main inventive idea expressed here.
  • the seat 3a comprises an elastic cushion 9 located between the arch of the said housing and the head-piece.
  • the cushion 9 remains compressed and therefore exerts an opposing elastic reaction which tends to take up all the play and stabilise the coupling between the head-piece itself and its housing; moreover, the reaction exerted by the cushion 9 is also partially transmitted to the coupling between the detent 4b and the working end 6 of the slider 7, increasing locally the frictional force and therefore making the locking system even more stable and secure.
  • the elastic cushion 9 is arranged in the vicinity of the working end 6 of the slider 7.
  • the elastic energy accumulated in the compressed cushion 9 also facilitates expulsion (see arrow R in Fig. 4) of the head-piece 4 from the housing 3a as soon as the slider 7 is disengaged from the detent 4b.
  • the head-piece 4 has an extended pressure piece 5, at its end directed towards the neck 2 of the toothbrush, which is devoid of bristles S or other cleaning means.
  • This extended pressure piece 5 is particularly convenient for gripping with a finger and applying a slight pressure to the head-piece in order to engage it into its housing, after initially positioning it with the aid of the relief 4a inside the front seat 3b of the head 3.
  • the brush comprises a skeleton body 100, made of substantially rigid material (for example polypropylene), and a filling 200 consisting of substantially soft and elastic material (for example rubber or elastomer material).
  • the filling 200 also forms the elastic mass G or G' and the cushion 9; for this purpose the skeleton 100 of the brush has holes 11 and 12 through which the filling 200 is able to pass, respectively, into the housing 3a, so as to form the cushion 9, and into the seat 8, so as to form the mass G'.
  • toothbrush structure described above may be obtained in the best possible manner by means of a particular and original manufacturing method which will be described below.
  • the locking slider 7 is moulded using a first material, for example Nylon®, polyamide, acetal or polyacetal resins.
  • the slider is retained in a suitable position, by means of support elements (such as, for example, thin pins) inside a subsequent mould in which a skeleton body 100, consisting of a second material which is physically and/or chemically "unrelated" to or “incompatible” with the first material, for example polypropylene, is moulded.
  • support elements such as, for example, thin pins
  • the term "incompatible” is used to indicate that the second material does not tend to adhere to nor merge with the first material during moulding of the second element onto the first element: this ensures that the slider 7 subsequently remains free to slide inside the skeleton body 100 (in the case shown, within the neck 2) of the toothbrush in a sliding seat which it itself defines during the moulding process, without it being necessary to carry out further smoothing or finishing operations on the slider or on the seat itself.
  • first material and second material examples include polyamide (PA) with polypropylene (PP), polyethylene, polystyrene (PS), SAN, ABS, acetal resin (POM) and the like, or, polycarbonate with polypropylene (PP), polyethylene, polystyrene (PS), SAN, ABS, acetal resin (POM) and the like.
  • PA polyamide
  • PP polypropylene
  • PS polystyrene
  • SAN polystyrene
  • ABS acetal resin
  • POM polycarbonate with polypropylene
  • PP polyethylene
  • PS polystyrene
  • ABS acetal resin
  • POM acetal resin
  • the skeleton body 100 forms most of the handle 1, the neck 2 and the housing 3, constituting, by its nature, the structural portion of the toothbrush.
  • the rough-finished part previously obtained is transferred into a third mould into which the filling material 200 is injected, said material forming, among other things, the elastic mass G or G', with which the slider 7 interacts, and, possibly, also the cushion 9.
  • the filling material is preferably a rubbery or elastomer material and also has the function of completing and providing a finish for the entire toothbrush.
  • Suitable materials are, for example, PTE elastomers which are compatible with the corresponding first and second materials to which they must adhere.
  • the invention provides a toothbrush with a replaceable head in which, despite the small dimensions of the replaceable portion, solid assembly together with safe use are achieved.
  • the user in order to obtain disengagement of the head-piece from its housing, the user must operate voluntarily the locking slider and it is not conceivable, under any circumstances, that the head-piece might accidentally become detached due to simple bending or deformation of the toothbrush itself.
  • the elastomer mass by exerting a significant elastic reaction, ensures that the assembly system is extremely safe against accidental disassembly and takes up any possible play which otherwise would occur during use.
  • the holding means (represented by the detent/groove pair 3b, 4a and detent/slider pair 4b, 7) have been shown arranged opposite each other at the two ends of the head, but it is conceivable that the slider may slide along the sidewall of the head-piece, locking the latter laterally cooperating with another detent/groove pair arranged on the opposite side.
  • the operative portions of the retaining elements may have widely ranging forms, provided that they perform the function described above.
  • the locking end of the slider could be in the form a fork, if necessary having a width such as to embrace the two sides of the head-piece.
  • the teachings of the invention may also be extended to a device for oral hygiene in which the head-piece is in the form of an insert provided with other working elements (for example a rubberized head-piece for massaging the gums).

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  • Brushes (AREA)
EP20000117179 1999-08-10 2000-08-10 Verbesserte Zahnbürste mit auswechselbarem Bürstenträger und Herstellungsverfahren Expired - Lifetime EP1075806B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITMI991806 1999-08-10
IT99MI001806 IT1313135B1 (it) 1999-08-10 1999-08-10 Spazzolino a testina intercambiabile perfezionato e suo metodo difabbricazione
ITMI001099 2000-05-18
IT2000MI001099A IT1318525B1 (it) 2000-05-18 2000-05-18 Spazzolino scomponibile a bloccaggio attivo.

Publications (2)

Publication Number Publication Date
EP1075806A1 true EP1075806A1 (de) 2001-02-14
EP1075806B1 EP1075806B1 (de) 2004-10-27

Family

ID=26331674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000117179 Expired - Lifetime EP1075806B1 (de) 1999-08-10 2000-08-10 Verbesserte Zahnbürste mit auswechselbarem Bürstenträger und Herstellungsverfahren

Country Status (4)

Country Link
EP (1) EP1075806B1 (de)
AT (1) ATE280521T1 (de)
DE (1) DE60015247T2 (de)
ES (1) ES2230012T3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001087112A1 (en) 2000-05-18 2001-11-22 Ponzini S.P.A. Disassemblable toothbrush with positive blocking
WO2003034863A1 (en) * 2001-10-25 2003-05-01 Ponzini S.P.A. Support for interdental brushes and similar instruments for oral hygiene
EP1817978A1 (de) * 2006-02-09 2007-08-15 Trisa Holding AG Kehrvorrichtung mit Drehgelenkstielhalter, Drehgelenkstielhalter, sowie Verfahren zur Herstellung des Drehgelenkstielhalters
CN110167480A (zh) * 2016-11-03 2019-08-23 米哈兰·帕帕吉安 牙刷替换刷头配件
US20220369799A1 (en) * 2021-05-23 2022-11-24 Chilon Industries, LLC Dispensing hair brush system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR459442A (fr) * 1913-06-19 1913-11-05 Adam Dickson Fordyce Perfectionnements aux brosses à dents
CH83482A (fr) * 1919-03-31 1920-05-17 Charles Strauss Brosse démontable
FR602745A (fr) * 1925-08-29 1926-03-25 Prod Aseptiques Soc D Expl Des Perfectionnements apportés aux brosses à dents
FR95197E (fr) * 1967-07-28 1970-07-31 Raulo Jean Perfectionnements aux brosses a dents a effet électrolytique.
US5471701A (en) 1994-11-30 1995-12-05 Parfenie; Mihai Toothbrush with ejectable head
WO1998001055A1 (de) 1996-07-08 1998-01-15 Trisa Bürstenfabrik Ag Triengen Zahnbürste sowie bürstenkopf für die zahnbürste
EP0870440A1 (de) 1997-04-11 1998-10-14 PONZINI S.p.A. Verbesserte Zahnbürste mit anwechselbarem Kopf
US5875510A (en) * 1996-09-27 1999-03-02 Chesebrough-Pond's Usa Co., Division Of Conopco, Inc. Replaceable head toothbrush

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR459442A (fr) * 1913-06-19 1913-11-05 Adam Dickson Fordyce Perfectionnements aux brosses à dents
CH83482A (fr) * 1919-03-31 1920-05-17 Charles Strauss Brosse démontable
FR602745A (fr) * 1925-08-29 1926-03-25 Prod Aseptiques Soc D Expl Des Perfectionnements apportés aux brosses à dents
FR95197E (fr) * 1967-07-28 1970-07-31 Raulo Jean Perfectionnements aux brosses a dents a effet électrolytique.
US5471701A (en) 1994-11-30 1995-12-05 Parfenie; Mihai Toothbrush with ejectable head
WO1998001055A1 (de) 1996-07-08 1998-01-15 Trisa Bürstenfabrik Ag Triengen Zahnbürste sowie bürstenkopf für die zahnbürste
US5875510A (en) * 1996-09-27 1999-03-02 Chesebrough-Pond's Usa Co., Division Of Conopco, Inc. Replaceable head toothbrush
EP0870440A1 (de) 1997-04-11 1998-10-14 PONZINI S.p.A. Verbesserte Zahnbürste mit anwechselbarem Kopf

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001087112A1 (en) 2000-05-18 2001-11-22 Ponzini S.P.A. Disassemblable toothbrush with positive blocking
WO2003034863A1 (en) * 2001-10-25 2003-05-01 Ponzini S.P.A. Support for interdental brushes and similar instruments for oral hygiene
US7267548B2 (en) 2001-10-25 2007-09-11 Ponzini S.P.A. Support for interdental brushes and similar instruments for oral hygiene
EP1817978A1 (de) * 2006-02-09 2007-08-15 Trisa Holding AG Kehrvorrichtung mit Drehgelenkstielhalter, Drehgelenkstielhalter, sowie Verfahren zur Herstellung des Drehgelenkstielhalters
CN110167480A (zh) * 2016-11-03 2019-08-23 米哈兰·帕帕吉安 牙刷替换刷头配件
CN110167480B (zh) * 2016-11-03 2022-08-02 米哈兰·帕帕吉安 用于牙刷系统的替换的牙刷刷头组件
US20220369799A1 (en) * 2021-05-23 2022-11-24 Chilon Industries, LLC Dispensing hair brush system
US11882925B2 (en) * 2021-05-23 2024-01-30 Chilon Industries, LLC Dispensing hair brush system

Also Published As

Publication number Publication date
ES2230012T3 (es) 2005-05-01
DE60015247T2 (de) 2005-11-03
ATE280521T1 (de) 2004-11-15
EP1075806B1 (de) 2004-10-27
DE60015247D1 (de) 2004-12-02

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