EP1121034A1 - Brosse, en particulier brosse a dents - Google Patents

Brosse, en particulier brosse a dents

Info

Publication number
EP1121034A1
EP1121034A1 EP99953793A EP99953793A EP1121034A1 EP 1121034 A1 EP1121034 A1 EP 1121034A1 EP 99953793 A EP99953793 A EP 99953793A EP 99953793 A EP99953793 A EP 99953793A EP 1121034 A1 EP1121034 A1 EP 1121034A1
Authority
EP
European Patent Office
Prior art keywords
bristle
brush
perforated plate
bristle carrier
brush body
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
EP99953793A
Other languages
German (de)
English (en)
Other versions
EP1121034B1 (fr
Inventor
Armin Seifert
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.)
M&C Schiffer GmbH
Original Assignee
M&C Schiffer GmbH
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 M&C Schiffer GmbH filed Critical M&C Schiffer GmbH
Publication of EP1121034A1 publication Critical patent/EP1121034A1/fr
Application granted granted Critical
Publication of EP1121034B1 publication Critical patent/EP1121034B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/06—Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement
    • A46B7/08—Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement as a rotating disc

Definitions

  • the present invention relates to a brush, in particular a toothbrush with a brush body carrying cleaning elements and a perforated plate penetrated by the cleaning elements.
  • a toothbrush of the type mentioned, in which the cleaning elements are formed by bundles of bristles, is known, for example, from US Pat. No. 4,152,806 and US Pat. No. 4,149,293.
  • the perforated plate is pivotably mounted on the brush body. The distance between the perforated plate and the brush body is changed by the pivoting movement of the perforated plate. This also changes the free length of the ends of the bristle filaments on the use side, that is to say the portion of the bristle filaments which projects above the perforated plate, so that the pivoting movement of the perforated plate relative to the brush body causes a change in the rigidity of the bristle filaments. If the bristle filaments protrude the perforated plate with a relatively large length, the rigidity and thus the hardness of the brush is low; with a short length, the rigidity is high.
  • the brushes known at the outset from the prior art have the disadvantage that they do not meet today's hygienic requirements.
  • a wedge-shaped slot is formed between the brush body and the attachment-side end of the perforated plate, in which bacteria and contaminants can become lodged.
  • Also in the area of the bristle filaments there is a gap between the perforated plate and the brush body, in which dirt can accumulate, so that the brush makes an unsightly impression after a certain period of use.
  • the toothbrushes mentioned above also have the disadvantage that the free length of all the bristle filaments projecting through the perforated plate is not changed uniformly due to the pivoting movement of the perforated plate. Rather, the bristle fi
  • the present invention has for its object to provide a stiffness adjustable brush and in particular a stiffness adjustable toothbrush, which meets today's hygienic requirements, which offers an attractive appearance even after a long period of use and whose stiffness can be adjusted with high accuracy .
  • the present invention proposes a brush and in particular a toothbrush of the type mentioned at the outset, which is further developed according to the invention in that the cleaning elements are arranged on a bristle holder which is in threaded engagement with the brush body, and in that the perforated plate is rotatably held on the brush body.
  • the brush body Due to the perforated plate rotatably held on the brush body, the brush body is closed off at the fastening-side ends of the bristle filaments. These are held in a bristle holder which is in threaded engagement with the brush body. To change the rigidity, the bristle holder is rotated relative to the brush body, so that the bristle holder moves relative to the brush body according to the thread pitch in the axial direction of a bore receiving the bristle holder.
  • the perforated plate only follows the rotation of the bristle carrier, so that a change in the rigidity of the cleaning elements is brought about without an open gap opening up between the perforated plate and the brush body, in which dirt can collect.
  • the bristle Carrier overall its position relative to the perforated plate, so that all the cleaning elements held on the bristle carrier are evenly changed in length. Accordingly, the rigidity of all of the cleaning elements projecting beyond the perforated plate, which are formed, for example, by bristle filaments, changes in an identical manner.
  • the brush according to the invention has the further advantage that the desired stiffness of the bristle filaments can be set precisely by the rotation of the bristle carrier.
  • the perforated plate is flush with the top of the brush body. This measure creates a smooth surface on the surface of the brush in the area of those bristles whose rigidity can be changed.
  • an annular groove is preferably provided on the brush body, in which the perforated plate is detachably and rotatably held.
  • the detachable connection between the perforated plate and the brush body is preferably created by a snap-in connection.
  • the perforated plate can thus be removed from the brush body and the bristle holder rotated out of the brush body in order to exchange worn bristle filaments held on the bristle holder. If all of the bristle filaments of the brush are arranged on the one or more bristle carriers, if all of the bristle filaments wear out, it is not necessary to replace the brush as a whole, but only the bristle carrier carrying the bristle filaments and preferably the perforated plate penetrated by the bristle filaments.
  • the bristle carrier is preferably detachably connected to the brush body together with the perforated plate.
  • This detachable unit forms a bristle insert which can be used as an exchange part in the brush body.
  • the detachable connection between the perforated plate and the brush body is preferably formed by a latching connection which is designed such that pressure against the Bristle holder presses this against the perforated plate and the perforated plate can be removed from the brush body together with the bristle holder.
  • At least two threaded webs distributed over its circumference are preferably provided on the bristle carrier, wherein guide grooves are provided between the perforated plate and a thread formed on the brush body for the threaded webs.
  • guide grooves are provided between the perforated plate and a thread formed on the brush body for the threaded webs.
  • the removal of the bristle carrier and perforated plate is preferably simplified in that the respective insertion grooves are flush with the end of the threads for the threaded pins.
  • the thread webs abut in one end position on a boundary surface for the thread formed on the brush body. This boundary surface is aligned with one side surface of a guide groove, so that the threaded webs come to rest in the insertion grooves in the end position and the bristle holder in this end position can only be removed from the brush body by axial displacement in the direction of the perforated plate.
  • a hardness scale is provided on the end face of the bristle carrier facing away from the bristle filaments, so that the user of the brush is able to predetermine a desired stiffness of the bristle filaments.
  • the bristle holder can be connected to a knurled ring which surrounds the partial area of the brush body surrounding the bristle holder. Pers at least partially overlooked. From a hygienic point of view, however, it is preferable to create an engagement area, for example for the fingers of the user, instead of such a knurled ring on the end face of the bristle carrier facing away from the bristle filaments. In view of simple handling, however, it is preferable to design the engagement area in such a way that a bristle holder tool can be brought into operative connection with the bristle holder.
  • Such a bristle holder tool is preferably detachably connected to the brush body, so that the bristle holder tool is always at hand.
  • the brush body is extended by the detachable bristle carrier tool connected to it, so that the handling of the brush is improved overall.
  • the present invention further relates to a bristle insert for a brush of the type mentioned at the outset with a bristle carrier carrying cleaning elements, on the circumferential surface of which threaded webs are formed, and a perforated plate penetrated by the cleaning elements.
  • a bristle insert is suitable as a spare part for the above-mentioned brush, which can also be an electrically driven toothbrush.
  • Preferred embodiments of the bristle insert are specified in the dependent claims 17 to 22.
  • Figure 1 is a partially sectioned side view of an embodiment designed as a toothbrush.
  • FIG. 2 is an enlarged sectional view along the line II-II as shown in FIG. 1;
  • Fig. 3 is a side view of a bristle carrier for the embodiment shown in Fig. 1;
  • FIG. 4 shows a plan view of the underside of the bristle carrier as shown in FIG. 3;
  • FIG. 5 shows a partially sectioned illustration of the brush head of the brush shown in FIG. 1 in a first position of the bristle holder
  • FIG. 6 shows the brush head shown in FIG. 5 in a second position of the bristle holder
  • FIG. 7 shows a side view of part of a further embodiment designed as a toothbrush
  • Fig. 8 is a perspective view of a third embodiment designed as a toothbrush and
  • Fig. 9 is a plan view of a bristle carrier with exemplary bundle cross sections.
  • the toothbrush comprises a grip piece 2 and a brush head 4, a tapered neck area 6 being formed between the two, which provides the elasticity between the grip piece 2 and the brush head 4 which is necessary to avoid injuries to the oral mucosa caused by the brush head 4 acting in the mouth area.
  • a bristle holder tool 8 is arranged on the end of the handle 2 facing away from the brush head 4. This bristle carrier tool 8 is connected to the handle 2 via a latching connection, not shown.
  • the handle 2 and the boron Stismemaschinemaschine 8 each have a cylindrical core 10, on the circumference three ribs 12 extending in the longitudinal extension of the handle 2 are arranged distributed.
  • the diameter of the core 10 and the ribs 12 are identical in the transition region between the handle 2 and the bristle carrier tool 10. Only in the area of the ribs 12 is a notch 11 provided by chamfering the opposite rib end faces, which signals the transition between the handle 2 and the bristle carrier tool 8.
  • the ribs 12 on the one hand and the core 10 on the other hand are formed both on the handle 12 and on the bristle carrier tool 8 by components which differ from one another, the ribs 12 preferably being formed by a flexible plastic. Alternatively, the ribs 12 can also be made of a harder material.
  • the brush head 4 is formed by an essentially ring-shaped component which is integrally connected to the neck region 6.
  • a thread 14 is formed on the inner cylindrical surface of a recess 13 of the annular brush head 4 and is shown in more detail in FIG. 2.
  • 18 insertion grooves 20 are formed corresponding to the number of threaded webs 18 provided on a bristle carrier 16 shown in FIG. 3.
  • a side surface 22 which laterally delimits the insertion groove 20 forms a stop to an upper thread turn of the thread 14.
  • An annular groove 24 is formed underneath the upper edge of the brush head 4, the radius of which is smaller than the distance between the center of the annular brush head 4 and the circumferential boundary surface of the insertion groove 20.
  • This configuration creates a particularly compact design of the brush head 4.
  • the bristle carrier 16 shown in FIG. 3 is formed by an essentially cylindrical body, on the circumference of which the threaded webs 18 (here two) are arranged distributed.
  • a multiplicity of bristle filaments 26 combined into bristle bundles 25 projects through the upper end face of the bristle carrier 16 and is fastened to it.
  • the bristle filaments 26 can be fastened either in a conventional manner, ie by means of a metallic anchor.
  • the bristle carrier 16 is bristled when the perforated disk is placed on it, ie the bristle filaments 26 are introduced into the bristle carrier 16 through the perforated disk.
  • the bristle filaments can be made by overmolding bristle bundle ends during the injection molding manufacture of the bristle carrier 16.
  • the perforated disk is preferably injected together with the bristle carrier 16, the mold cavity for the perforated disk being designed in such a way that the individual bristle bundles to be connected to the bristle carrier 16 are flowed around without contact.
  • the end face of the bristle carrier 16 facing away from the bristle filaments 26 has a slight convex curvature.
  • a central bore 28 is formed on this surface, into which a pin 30 with a cylindrical cross-sectional area formed on the bristle carrier tool 8 can be inserted.
  • the bore 28 acts with the pin 30 as a centering for the bristle carrier tool 8.
  • three recesses 32 are arranged which are distributed over the circumference and extend in the radial direction from the bore 28.
  • the recesses 32 are designed such that they are cut into the convex surface of the bristle holder 16 and the ribs 12 of the bristle holder tool 8 can be inserted into the recesses 32 in a form-fitting manner.
  • a hardness scale 34 is attached, which is formed by optically distinguishable points arranged on the edge region of the circular end face. This hardness scale is measured with the help of a te of the brush head 4 trained, different in color from the material of the neck region 6 reading web 36 readable.
  • a bristle insert which can be inserted into the recess 13 formed on the brush head 4 as a wearing part, consists of the bristle carrier 16 and a perforated plate 38 which is penetrated by the bristle bundles 25 and which is shown in FIGS. 5 and 6.
  • the perforated plate 38 is formed as a circular disk, with holes corresponding to the position of the respective bristle bundles 25 being provided on the perforated plate 38.
  • the diameter of these bores corresponds to the thickness of the respective bristle bundle 25 projecting through the corresponding bore.
  • bristle bundles 25 of identical diameter are used.
  • the geometric configuration of the holes in the perforated plate 38 corresponds to the delimitation of the respective receptacle for the corresponding bristle bundles 25 in the bristle carrier 16.
  • the thread webs 18 are first brought into overlap with the respective insertion grooves 20. Thereafter, the bristle carrier 16 is pressed in the axial direction into the recess 13 together with a perforated plate 38 which is penetrated by the bristle bundle 25 and lies on the top of the bristle carrier 16.
  • a convex bead 40 formed on the side surface of the perforated plate 38 presses the annular groove 24, and detents 42 covering this on the upper side radially outward.
  • the axial advance of the bristle carrier 16 together with the perforated plate 30 is ended when the threaded webs 16 hit the lower edge of the upper thread and the perforated plate 38 is received in the annular groove 24 and is engaged behind by the detents 42. In this end position, the perforated plate 38 lies on the upper end face of the bristle carrier 16, so that the bristle filaments 26 protrude beyond the perforated plate 38 with the maximum use length.
  • the bristle carrier tool 8 is pulled off the handle 2 in the axial direction in the embodiment shown.
  • the pin 30 is inserted into the bore 28 and the ribs 12 are introduced into the recesses 32 by rotating the bristle carrier tool 8 centered in this way on the bristle carrier 16.
  • the bristle holder tool 8 By actuating the bristle holder tool 8, the bristle holder 16 is now rotated counterclockwise, so that the bristle holder 16 moves along the recess 13 in the axial direction in accordance with the pitch of the thread 14.
  • the perforated plate 38 rotatably mounted in the annular groove 24 follows this rotation of the bristle carrier 16. The rotation of the bristle carrier 16 causes the bristle carrier 16 to move away from the perforated plate 38.
  • the fastening-side ends of the bristle filaments 26 move away from the perforated plate 28 in the same way, as a result of which the free length of the bristle filaments 26 projecting outwards extends and the stiffness of the bristle increases.
  • the desired rigidity can be set in a precisely predeterminable manner via the hardness scale 34 and the reading web 36.
  • the engagement of the bristle carrier tool 8 enables the stiffness of the brush to be adjusted easily.
  • any arbitrarily medically acceptable rigidity of the bristle of the toothbrush can be set.
  • all the bristle filaments 26 are arranged on the bristle carrier 16. This offers the advantage that worn bristle filaments 26 can be replaced by exchanging the bristle carrier 16.
  • the component formed from the handle 2, the brush head 4, the neck region 6 and the bristle carrier tool 8 can be used regardless of the wear of the bristle filaments 26.
  • a new bristle carrier with unused bristle filaments is inserted in the manner described above.
  • FIGS. 7 and 8 show two further exemplary embodiments in which, in accordance with the exemplary embodiment explained above, a bristle carrier 16 is held in threaded engagement on a brush head 4.
  • a bristle carrier 16 In the longitudinal direction of the toothbrush in front of and behind the bristle carrier 16, further bristle bundles 50, 52 are provided, which are fastened to the brush head 4 in a manner known per se and whose rigidity cannot be adjusted.
  • the bristle bundles 52 adjacent to the neck region 6 are cut in the longitudinal direction in such a way that the bristle surface comprising the ends of the bristle bundles 52 on the use side are inclined forward, whereas the bristle filaments forming the front bristle bundles 50 are cut in this way are that the bristle surface having the use-side ends of these bristle bundles 50 is inclined towards the rear, that is to say towards the neck region 6.
  • the bristle bundles 25 arranged on the bristle carrier 16 are cut spherically. In the end position of the bristle carrier 16 shown in FIG.
  • the bristle bundles 50, 52 which are arranged adjacent to the bristle filaments 25 and are not adjustable in their hardness are set lower than the adjustable bristle bundles 25.
  • the bristle filaments of the bristle bundles 50, 52 can be formed from a different material compared to the bristle filaments of the bristle bundles 25 and differ from them in particular in terms of their hardness. If the adjustable bristle bundles 25 are extended by twisting the bristle carrier 16, the influence of these bristle bundles 25 in the action of the plaster is reduced. strengthens; if the bristle bundles 25 are shortened, the cleaning behavior of the bristle bundles 50, 52 predominates. This means that not only the rigidity of the brush, but also the cleaning behavior of the brush as a whole can be changed by rotating the bristle carrier 16.
  • FIG. 7 A further exemplary embodiment of the present invention is shown in FIG.
  • the cleaning elements fastened to the bristle carrier are not formed by bristle bundles but by soft-elastic massage sticks 54, which in the present case consist of a thermoplastic elastomer (TPE).
  • TPE thermoplastic elastomer
  • the free length of the massage rods 54 and thus their rigidity can be changed by rotating the bristle carrier 16 relative to the brush head 4, as in the exemplary embodiments described above.
  • bristle bundles 50, 52 which are not adjustable in length and thus hardness are provided in front of and behind the massage elements 54 in the longitudinal direction.
  • FIG. 9 shows different cross sections of cleaning elements which can be formed either by bristle bundles or by TPE bristles.
  • the bristle carrier 16 can optionally or in combination have cleaning elements with a closed cross-sectional profile, which can be triangular (reference number 56), round (reference number 58), square or rectangular (reference number 60) or polygonal (reference number 62).
  • the cross section can also be essentially C-shaped. With reference numeral 64, such an open profile is one Cleaning element shown. It is also possible to design the cross-sectional profile of the cleaning elements in a star shape or a cross shape (reference number 66).
  • the cleaning element can have the cross-sectional geometry of a closed hollow profile (reference symbol 68).
  • the hollow profile shown has an irregularly shaped circumferential surface, the wall thickness being relatively small compared to the diameter of the hollow profile. Open cross-sectional shapes of this type are particularly suitable for forming a hollow massage stick.
  • the present invention is not restricted to the exemplary embodiments shown.
  • a plurality of bristle carriers to which perforated plates rotatably mounted on the brush body are assigned, can be provided in order to be able to adjust the different hardness ranges of the bristles of a brush.
  • any type of thread-like engagement between the bristle holder and the brush body can be realized.
  • the recess 13 provided on the brush head 4 is encapsulated by the perforated plate 38 on the one hand and by the underside or the peripheral surface of the bristle carrier 16 on the other hand, in order to minimize the penetration of dirt and contaminants into the recess 13.
  • one or more rinsing openings opening outwards can be provided on the brush body, which communicate with the gap formed between the brush body 2, 4, 6 and the bristle carrier 16. Impurities introduced into the recess 13 can be rinsed out between the bristle carrier 16 and the perforated plate 38 via such rinsing openings.
EP99953793A 1998-10-13 1999-10-13 Brosse, en particulier brosse a dents Expired - Lifetime EP1121034B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29818046U DE29818046U1 (de) 1998-10-13 1998-10-13 Bürste, insbesondere Zahnbürste
DE29818046U 1998-10-13
PCT/EP1999/007672 WO2000021406A1 (fr) 1998-10-13 1999-10-13 Brosse, en particulier brosse a dents

Publications (2)

Publication Number Publication Date
EP1121034A1 true EP1121034A1 (fr) 2001-08-08
EP1121034B1 EP1121034B1 (fr) 2003-03-26

Family

ID=8063703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99953793A Expired - Lifetime EP1121034B1 (fr) 1998-10-13 1999-10-13 Brosse, en particulier brosse a dents

Country Status (5)

Country Link
US (1) US6374448B2 (fr)
EP (1) EP1121034B1 (fr)
AT (1) ATE235177T1 (fr)
DE (2) DE29818046U1 (fr)
WO (1) WO2000021406A1 (fr)

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Also Published As

Publication number Publication date
US6374448B2 (en) 2002-04-23
US20010029639A1 (en) 2001-10-18
EP1121034B1 (fr) 2003-03-26
WO2000021406A1 (fr) 2000-04-20
ATE235177T1 (de) 2003-04-15
DE29818046U1 (de) 2000-02-17
DE59904774D1 (de) 2003-04-30

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