EP1727445B1 - Vorrichtung zum halten eines zahnbürstenkopfes - Google Patents

Vorrichtung zum halten eines zahnbürstenkopfes Download PDF

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Publication number
EP1727445B1
EP1727445B1 EP04801147.2A EP04801147A EP1727445B1 EP 1727445 B1 EP1727445 B1 EP 1727445B1 EP 04801147 A EP04801147 A EP 04801147A EP 1727445 B1 EP1727445 B1 EP 1727445B1
Authority
EP
European Patent Office
Prior art keywords
retaining
toothbrush
holding
combination
bristle carrier
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
EP04801147.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1727445A1 (de
Inventor
Reto Straehler
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.)
Trisa Holding AG
Original Assignee
Trisa Holding AG
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 Trisa Holding AG filed Critical Trisa Holding AG
Publication of EP1727445A1 publication Critical patent/EP1727445A1/de
Application granted granted Critical
Publication of EP1727445B1 publication Critical patent/EP1727445B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/08—Parts of brush-making machines
    • A46D3/087—Holders or supports for brush bodies

Definitions

  • the present invention relates to a combination of a toothbrush and a device for holding a toothbrush head in a processing machine.
  • Conventional toothbrushes consist of a toothbrush head, a subsequent toothbrush neck and a subsequent toothbrush handle.
  • the part giving the structure to the toothbrush head, and in particular the part receiving the bristles, is usually made of a hard plastic, for example polypropylene.
  • the toothbrush head may further comprise an elastic soft plastic material.
  • bristle bundles bent in a U-shape are anchored in holes in the hard plastic part of the brush head by means of metal platelets. During this tamping process, the toothbrush heads are held in place by means of holding devices.
  • WO-A-98/58563 have a holding plate cooperating with the free end of the toothbrush head and two in the transition region from the toothbrush neck to the toothbrush head attacking, movable from a receiving position into a clamping position brackets. These may be concave in shape to encompass the toothbrush head from the side. The front of the toothbrush head with the holes for receiving the bristle bundles is exposed, during which the back of the toothbrush head is supported to counteract the forces acting during the plug forces.
  • Reliable scissor hold of the toothbrushes on the toothbrush head and accurate positioning are particularly important in the tamping machine, so that the tamping tool can properly hit the molded holes in the toothbrush head.
  • the bristles are usually cut to the desired length and then ground to round off the ends. Since considerable forces can also occur on the toothbrush head during these post-processing processes, especially in the cutting process, the toothbrushes are usually retained by means of holding devices and transported from processing station to processing station both in the tamping machine and in post-processing.
  • Toothbrushes or toothbrush heads of this type are for example from the publications DE-U-29822826 . DE-U-20109123 . US-A-5,269,038 and US-A-5,799,354 known. All these toothbrushes have in common that they have a plate-shaped bristle carrier and a holding web of a structuring hard plastic.
  • the retaining bar is in each case in the toothbrush neck over and between the holding web and the bristle carrier has a recess. This gives the bristle carrier relative to the retaining bar a freedom of movement. This flexibility is achieved either by means of a material weakening in the hard plastic, for example in the form of a film hinge or a thin material bridge or a hinge made of soft rubber-elastic plastic.
  • the holding device has a holding part with a retaining flange which engages between the bristle carrier and the holding web.
  • a support surface of the retaining flange cooperates with the bristle carrier, so that now the bristle carrier is positioned in spite of its mobility relative to the holding web in the holding device and held so that it can absorb the forces occurring during machining, such as plugging, cutting and grinding.
  • the device 10 for holding a toothbrush head 12 of a toothbrush 14 is intended for use in toothbrush processing machines.
  • tamping machines 16 and this downstream post-processing machines 18 with a cutting station for cutting the bristles to the desired length, a grinding station for rounding off the free ends of the cut bristles and ev.
  • Other workstations considerable forces can be exerted on the toothbrush heads 12, which is why the holding device 10 especially, but not exclusively, suitable for use in such machines.
  • the stuffing machine 16 of known type has a stuffing unit 20, by means of which bristle bundles in the Toothbrush head 12 are used.
  • the toothbrush head 12 is held by means of a holding device 10.
  • Denoted at 22 is a likewise known supply device which supplies the tamping machine 16 with non-bristled toothbrush bodies, which are introduced into the holding device 10 by means of a handling device.
  • a further handling device removes the respective toothbrush 14 after the stuffing operation of the holding device 10 and transfers it to a conveyor 24 for further transport to the post-processing machine 18.
  • the bristled toothbrushes 14 are likewise inserted by means of a handling device into a holding device 10, wherein the holding devices in the feed direction V are moved stepwise to move the held by the holding devices 10 toothbrushes 14 from one processing station to the next.
  • the toothbrush head 12 has two plate-shaped circular bristle carriers 28, which are provided on their upper side with receiving holes 30 for the anchoring of bristle bundles 32.
  • the toothbrush head 12 on a holding web 34 which seen in the longitudinal direction of the toothbrush 14, the bristle carriers 28 subsequently merges into the toothbrush neck 26.
  • the bristle carriers 28 are arranged parallel to the holding web 34 and at a distance therefrom, wherein they are fastened by means of a centrally arranged material bridge 36 on the holding web 34.
  • the cross section of the material bridge 36 is substantially smaller than the diameter of the bristle carrier 28 and the width of the holding web 34, between the holding web 34 and the bristle carriers 28 depending on an annular space, or an annular recess 38 is present.
  • the bristle carrier 28, material bridges 36 and the holding web 34 are integrally made of hard plastic, such as polypropylene PP, together with the toothbrush neck 26.
  • FIGS. 4 and 5 show a holding device according to the invention 10 for toothbrush heads 12 according to the FIGS. 2 and 3 ,
  • the holding device 10 has a base plate 40, on which two holding parts 42 are movably mounted in the manner of a tensioning clamp in and opposite to the direction of the double arrow P. In FIG. 4 From this, they are symmetrical to a longitudinal center plane 46 in the direction of the double arrow P and thus at right angles to the longitudinal center plane 46 in the in the FIG. 5 shown receiving position 48 slidably. In the receiving position 48, the two holding parts 42 are spaced apart from each other so far that the toothbrush head 12 fits between them with play.
  • the holding parts 42 are mirror-symmetrical with respect to the longitudinal center plane 46. They have a cuboid basic shape, on which the toothbrush head 12 matched receiving recesses 50 are formed. Seen from above, these receiving recesses 50 each have two indentations 52 in the form of a circular ring segment, the base surface of these indentations 52 forming a support surface 54 for the bristle carrier 28. The radially inner end of these recesses 52nd is bounded by a für trimaus fundamentalung 56 for the material bridges 36. Subsequent to this passage recess 56, the receiving recesses 50 are formed opposite to the holding web 34 of the toothbrush head 12, as shown in FIG FIG. 4 is indicated on the hand of the outline of the web 34 shown in dashed lines.
  • the recess 52 is bounded radially outwardly by a clamping surface 58 in the form of a circular cylinder jacket segment. These clamping surfaces 58 cooperate in the holding position 44 with the peripheral lateral surface 60 of the bristle carrier 28.
  • the receiving recesses 50 thus limit a retaining flange 62, with which the holding parts 42 engage in the holding position 44 in the recesses 38 between the bristle carriers 28 and the holding web 34.
  • the bristle carriers 28 are supported flat on their lower side facing away from the receiving holes 30 by means of the support surfaces 54 integrally formed on the retaining flanges 64.
  • the holding members 42 are arranged in the holding position 44 at a distance from each other. This ensures that the clamping surfaces 58 on the lateral surfaces 60 come to rest and the bristle carrier 28 can clamp.
  • the retaining flanges 62 have on their side facing away from the support surface 54, lower side further support surfaces 54 ', which create the closure of the holding device 10 on the holding web.
  • a toothbrush body is moved by means of a handling device in the position shown. Subsequently, the holding parts 42 are brought into the holding position 44, after which the handling device releases the toothbrush body. The same steps are performed in reverse order for the release of the toothbrush 14th
  • the recesses 38 may be filled after bristling by means of a soft resilient plastic material, such as TPE, as described in the document DE-U-29822826 is disclosed.
  • FIGS. 6 to 9 show the toothbrush head 12 and the toothbrush neck 26 of a toothbrush 14 similar form of training, as shown in the publication DE-U-20109123 is known. It has two plate-shaped, approximately rectangular bristle carrier 28, which are arranged one behind the other viewed in the longitudinal direction of the toothbrush 14. At the free end of the toothbrush head 12 is a brush head segment 64 which, like the bristle carrier 28, is provided with receiving holes 30 for fixing bristle bundles 32. A further toothbrush head segment 66 with receiving holes 30 for bristle bundles 32 is located on the toothbrush neck side of the bristle carrier 28. This further toothbrush head segment 66, the toothbrush neck 26, the holding web 34 and the brush head segment 64 are integral made of a hard plastic by injection molding.
  • the two bristle carrier 28 are also made of a hard plastic; they are connected to one another and to the brush head segment 64 or further brush head segment 66 by means of a soft elastic plastic material. These perpendicular to the longitudinal direction extending soft elastic plastic material bridges are in the FIGS. 6-8 denoted by 68.
  • the in the FIGS. 10 and 11 shown holding device 10 for receiving and holding the toothbrush head 12 according to the FIGS. 6 to 9 is constructed in principle the same as the holding device 10 according to the FIGS. 4 and 5 , It also has a base plate 40, on which two mirror-symmetrical to the longitudinal center plane 46 formed holding parts 42 are mounted perpendicular to the longitudinal center plane 46 displaceable.
  • the holding parts 42 in holding position 44 and in FIG. 11 shown in receiving position 48 In contrast to the holding device 10 according to the FIGS. 4 and 5 But now the receiving recesses 50 are equal to the in the Figures 6 -9 toothbrush head 12 shown formed.
  • the substantially cuboid holding parts 42 have an approximately oval-segment-like depression 52, which corresponds to the lateral outer contour of the toothbrush head 12.
  • the recess is bounded below by a support surface 54, which is intended, when closing the holding device 10, to engage under the two bristle carriers 28 and to support them flatly.
  • the recess 52 is bounded by a clamping surface 58. This is seen in cross-section concave shaped to include in holding position 44 of the holding members 42, the bristle carrier 28 from the side.
  • the support surfaces 54 are in turn partially formed on a retaining flange 62, on which on the side facing away from the support surface 54, a further support surface 54 'is formed for the retaining web 34.
  • the retaining flange 62 extends in the longitudinal direction over a region which is slightly shorter than the recess 38 between the retaining web 34 and the bristle carriers 28.
  • the retaining flanges 62 are bounded by an end face 70 extending parallel to the longitudinal center plane 46 , In holding position 44 of the holding parts 42, these end face 70 are held at a small distance from each other. This in turn ensures that the clamping surfaces 58 for clamping the bristle carrier 28 on the lateral lateral surfaces 60 come to rest.
  • the material thickness of the retaining flanges 62 at the end face 70 - FIGS. 10 and 11 - or in the passage recess 56 - FIGS. 4 and 5 are preferably at least 1 mm. In the direction away from the longitudinal center plane 46, this material thickness increases continuously. Further, the support surfaces 54 and the further support surfaces 54 'extend to a plane parallel to the base plate 40 each at an acute, but opposite angle, so that when closing the holding device 10, a centering effect is achieved.
  • the base plate 40 is formed between the holding parts 42 such that the toothbrush head 12 or holding web 34 is supported in the holding device 10.
  • a toothbrush of this kind is for example in the US-A-5,799,354 discloses - may be provided a support member for supporting the bristle carrier, which moves in the longitudinal direction of the toothbrush in this recess.
  • the holding part in the holding device stationary and postpone the toothbrush during insertion into the holding device on the retaining flange.
  • the toothbrush head in a known manner in the holding device and in addition to support the bristle carrier by means of a holding part.
  • the holding part or the holding parts can in this case, for example, retract from the side into the recess of the toothbrush.
  • the diameters of the receiving holes 30 for the bristle bundles 32 can be selected to be less than or equal to 1.7 mm. Investigations have shown that with such hole diameters the force on the bristle carrier 28 is minimal. Minimal diameters of the receiving holes 30 allow a minimum depth of the receiving holes 30, whereby the thickness of the bristle carrier 28 and the toothbrush head 12 can be minimized. Preferably, the depth of the receiving holes 30 is less than or equal to 4 mm.
  • soft elastic material for example TPE
  • soft elastic material is displaced by means of the holding part or the holding parts in order to support the bristle carrier 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Brushes (AREA)
EP04801147.2A 2004-03-24 2004-12-08 Vorrichtung zum halten eines zahnbürstenkopfes Expired - Lifetime EP1727445B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4962004 2004-03-24
PCT/CH2004/000724 WO2005089592A1 (de) 2004-03-24 2004-12-08 Vorrichtung zum halten eines zahnbürstenkopfes

Publications (2)

Publication Number Publication Date
EP1727445A1 EP1727445A1 (de) 2006-12-06
EP1727445B1 true EP1727445B1 (de) 2018-03-07

Family

ID=34959369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04801147.2A Expired - Lifetime EP1727445B1 (de) 2004-03-24 2004-12-08 Vorrichtung zum halten eines zahnbürstenkopfes

Country Status (5)

Country Link
US (2) US8141958B2 (pt)
EP (1) EP1727445B1 (pt)
CN (1) CN100571573C (pt)
BR (1) BRPI0418668B1 (pt)
WO (1) WO2005089592A1 (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101703345B (zh) * 2009-07-03 2011-04-20 扬州工业职业技术学院 牙刷机械自动夹具
BE1022828B1 (de) * 2015-02-23 2016-09-15 Gb Boucherie Nv Bürstenherstellungsvorrichtung, Bürstenkörperhalter und Verfahren zum Herstellen einer Bürste

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269038A (en) 1991-03-29 1993-12-14 Bradley Terry G Rocker toothbrush
ES2086572T3 (es) * 1992-03-31 1996-07-01 Boucherie Nv G B Metodo de producir cepillos.
GB2289236B (en) * 1994-05-09 1997-08-06 Boucherie Nv G B A brush making machine
US5799354A (en) 1997-02-27 1998-09-01 Amir; Ehud Toothbrush
DE19720024A1 (de) * 1997-05-13 1998-11-19 Zahoransky Anton Gmbh & Co Bürstenherstellungsmaschine
US5863102A (en) * 1997-06-24 1999-01-26 Colgate-Palmolive Company Method and apparatus to permit attachment of bristles to toothbrushes with resiliently flexible heads and to thereafter permit the trimming and end rounding of such bristles
DE29822826U1 (de) 1998-01-05 1999-04-01 Trisa Holding Ag, Triengen Bürstenkopf für eine Zahnbürste
DE20109123U1 (de) 2001-05-31 2002-10-02 M + C Schiffer GmbH, 53577 Neustadt Bürste, insbesondere Zahnbürste

Also Published As

Publication number Publication date
US8365339B2 (en) 2013-02-05
CN1942119A (zh) 2007-04-04
EP1727445A1 (de) 2006-12-06
BRPI0418668B1 (pt) 2013-09-10
WO2005089592A1 (de) 2005-09-29
CN100571573C (zh) 2009-12-23
US20120144613A1 (en) 2012-06-14
US8141958B2 (en) 2012-03-27
US20070241606A1 (en) 2007-10-18
BRPI0418668A (pt) 2007-06-05

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