EP0159940B1 - Bürste mit federnd einziehbaren Borsten, insbesondere zum Bürsten von unregelmässigen Oberflächen, wie Zähnen - Google Patents

Bürste mit federnd einziehbaren Borsten, insbesondere zum Bürsten von unregelmässigen Oberflächen, wie Zähnen Download PDF

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Publication number
EP0159940B1
EP0159940B1 EP85400703A EP85400703A EP0159940B1 EP 0159940 B1 EP0159940 B1 EP 0159940B1 EP 85400703 A EP85400703 A EP 85400703A EP 85400703 A EP85400703 A EP 85400703A EP 0159940 B1 EP0159940 B1 EP 0159940B1
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EP
European Patent Office
Prior art keywords
membrane
face
brush
wall
tufts
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Expired
Application number
EP85400703A
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English (en)
French (fr)
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EP0159940A2 (de
EP0159940A3 (en
Inventor
Bernard Taravel
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Laboratoires Pharmascience SA
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Laboratoires Pharmascience SA
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Priority to AT85400703T priority Critical patent/ATE46253T1/de
Publication of EP0159940A2 publication Critical patent/EP0159940A2/de
Publication of EP0159940A3 publication Critical patent/EP0159940A3/fr
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Publication of EP0159940B1 publication Critical patent/EP0159940B1/de
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    • 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
    • A46B5/0025—Brushes with elastically deformable heads that change shape during use
    • A46B5/0029—Head made of soft plastics, rubber or rubber inserts in plastics matrix
    • 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

Definitions

  • the present invention relates to a brush with retractable bristles, in particular for brushing surfaces of complex relief and for example for brushing teeth.
  • Traditional brushes have tufts of bristles, a first end of which is trapped in a brush head, of which this end is integral, and of which a second end is free and used for brushing.
  • the respective free ends of the different tufts have an envelope surface which can deform slightly by bending the bristles in contact with a surface to be brushed but which, however, when this surface has too pronounced a relief, cannot adapt with sufficient precision on this surface and, above all, ensure contact with the latter with sufficient pressure everywhere to ensure correct brushing.
  • the object of the present invention is to remedy this drawback, by proposing a brush whose tufts of bristles can retract elastically, independently of one another, towards the inside of the brush so as to allow permanent adaptation of the surface. envelope defined by the free ends of these tufts on the surface to be brushed, and this without any noticeable difference in the intensity of the force applied to the different zones of the latter by the different tufts of bristles.
  • the brush head in order to allow said point elastic deformation of the membrane, has a cavity facing all of the bores in the wall, in common with all of these bores, opposite to the first face of the wall with respect to the membrane and the membrane is made of an isotropic material and has its own anisotropy such that the tufts of hair can retract elastically, independently of each other, towards the interior of said cavity.
  • a tensioning of the membrane will however favor this privileged point deformability in the direction of its thickness.
  • this prior art proceeds from a type of reasoning according to which, to ensure independence in the retraction and the elastic return of each tuft of hairs, it is necessary to associate with it a clean elastic return member.
  • the support grid precisely has the function of dissociating the membrane into as many zones as there are tufts and of ensuring mutual independence of these zones, in the spirit with which the first of the aforementioned American patents presents as alternatively an assembly comprising a multiplicity of helical springs each of which is associated with a tuft of bristles, replacing the association of a membrane and a support grid.
  • the present invention proceeds from a radically different philosophy since it proposes to associate with all of the tufts of hair, defining a discontinuous structure due to their totally independent mounting, a single, continuous return member from a tuft to the other, by ensuring independence of movement and elastic return of the different tufts by using a specific quality of this return member, namely the membrane, and not by the structural device that constitutes a support of a membrane on a grid.
  • the membrane of a brush produced in accordance with the present invention therefore stressed in terms of its inherent deformation possibilities, necessarily has a considerably increased longevity in comparison with the membrane of a brush produced in accordance with the teachings of the two aforementioned American patents.
  • FIGS. 1 to 3 designates a flat head of a brush such as a toothbrush, integral with a handle 27 and having a flat face 2 on which this head 1 carries a plurality of tufts 3 bristles, arranged in respective directions approximately parallel to one another and perpendicular to face 2.
  • the face 2 is hollowed out with a cavity 4 which the face 2 surrounds on all sides to define the periphery and which is closed, at the level of this face 2, by a membrane 5 made of an isotropic elastomer material chosen for its ability to communicate to the membrane its possibility of undergoing substantially punctual elastic deformations and its own anisotropic character, defined above.
  • An artificial balloon of the type used for making advertising balloons of a thickness of the order of 3 tenths of a mm, based on natural rubber, has been successfully used as a membrane.
  • the membrane 5 is secured in the stretched state with the brush head 1, on the flat face 2 thereof, over the entire periphery of the cavity 4 which the membrane 5 closes tightly, so that the cavity and the membrane enclose an air cushion whose presence advantageously increases the characteristic punctual deformability of the membrane in the direction of its thickness.
  • the cavity 4 can be opened by means allowing free circulation, with the outside of this cavity 4, of air and of the medium in which the brush can be brought to evolve in certain applications, for example toothpaste in an aqueous medium in the case of a toothbrush.
  • a membrane 6 in the stretched state is superimposed flat, opposite the cavity 4, a plate 6 made as the brush head 1 in a rigid material and for example in plastic.
  • This plate 6 is secured to the brush head 1, with which it encloses the membrane 5 continuously over the entire periphery of the cavity 4.
  • the plate 6 thus forms a rigid whole with the brush head 1, of which it could moreover form an integral part in other examples of implementation of the present invention, as will emerge from the description of FIGS. 4 and 5.
  • the plate 6 has a first flat face 7 thus turned towards the membrane 5, with which it is in flat contact when this membrane 5 is stretched, and towards the cavity 4, and a face 8 also flat, parallel to the face 7, and turned away from the membrane 5, towards the outside of the brush head 1.
  • a continuous peripheral zone 21 of the membrane 5 is pinched between the edge 19 of the plate 6 and the flange 20 of the face 2, which ensures the joining of the membrane with the head 1 and the plate 6, as well as the mutual solidarity of the latter.
  • This joining can be improved by bonding or mutual heat-sealing of the plate 6, at the junction 22 of the edge 19 of the plate 6 and of the face 8 thereof, and of the flange 20, by an edge 23 of the latter flush the face 8 of the plate 6, around the membrane 5.
  • the membrane 5 remains free both with respect to the plate 6 and with respect to the brush head 1.
  • the plate 6 is pierced right through with bores 9 in a number identical to that of the tufts 3, of which each of these bores 9 receives one, facing the cavity 4.
  • each bore 9 has two cylindrical zones of revolution about the same respective axis 10 approximately perpendicular to the faces 7 and 8, due to a zone 11 of smaller diameter, adjacent to the face 8 of the plate 6 , and a zone 12 of larger diameter, adjacent to the face 7.
  • the tuft 3 has between these two ends 14 and 15 an intermediate zone 16 mounted to slide, along the axis 10, in the zone 11 of the bore 9 and having for this purpose, transverse to the axis 10, a section as close as possible to that of the zone 11 .
  • the bristles of the tuft 3 are agglomerated for example by welding in the frequent case where these bristles are made of synthetic material, and the increase in section transverse of the tuft at the first end 14 thereof can advantageously be obtained by fusion in this case, or by any other means.
  • the first end 14 of the tuft 3 remains independent of the membrane 5, that is to say is not secured to the latter.
  • the hairs of this tuft are on the other hand independent, over a length suitable for communicating to the hairs of the entire tuft flexibility desired.
  • the ends 15 of the different tufts define a perfectly defined envelope surface 18, for example planar.
  • the shape of the envelope surface 18 thus adapts precisely to that of the surface 17.
  • the tufts 3 released by the comparatively projecting zones tend to return to their initial position by sliding in the opposite direction under the action of the membrane 5 which, tending elastically to resume its initial shape , tends to bring their first end 14 into contact with the shoulder 13, while the tufts 3 brought into contact with comparatively projecting areas retract in the manner described above.
  • the shape of the envelope surface 18 and that of the faces 2 of the brush head and 7 of the plate 6, that is to say also the shape of the membrane 5 in the stretched state between these faces 2 and 7, may be chosen different from those which have been described.
  • the shape and nature of the tufts 3, as well as their distribution can be chosen at will and possibly modulated to communicate different characteristics to different areas of the same brush.
  • the very structure of the brush head and the way in which the membrane is connected to it can have many variations and, in particular, instead of being attached to the brush head facing a cavity of the latter, the perforated wall guiding the tufts of bristles to sliding can form an integral part of the brush head with which the membrane can be secured peripherally, continuously, by any means otherwise allowing free movement of the membrane, and for example by a cover delimiting opposite the latter, except in the peripheral connection zone, a cavity allowing such movement.
  • FIG. 4 where 101 has designated a flat brush head, integral with a handle not shown and comprising a flat wall 102, delimited essentially by two plane faces 103, 104 mutually parallel , and a rim 105 continuously bordering the wall 102 by forming a projection relative to the face 104 thereof and having in particular a continuous inner peripheral face 106, perpendicular to the face 104 and disjoined from the latter to which it is connected via a continuous groove 107, immediately adjacent to the face 106 and recessed with respect to a plane virtual extension 108 of the face 104, and by a continuous flange 109 connecting the groove 107 to the face 104 and forming above the planar extension 108 of the face 104 a projection of constant value d less than the value D, also constant, of the projection formed by the flange 105, and in particular by the inner peripheral face 106 thereof, byrelative to the plan 108 extension of the face 104.
  • the wall 103 is pierced right through with a plurality of bores 110 each of which has its own axis 111 perpendicular to the faces 103 and 104 and opens into one and the other of these, in particular near the flange 109 but not therein.
  • each of the bores 110 is thus delimited by a peripheral face 112 of cylindrical revolution around the corresponding axis 111, with a constant diameter.
  • Each of the bores 110 like each of the bores 9 of the plate 6, is intended to receive and guide, when sliding along the corresponding axis 111, a respective tuft of bristles 113 at any point comparable to one of the tufts 3 described. with reference to Figures 1 to 3.
  • the tuft 113 has a first end 114 for mounting on the brush head 101 by confinement, inside the latter, between the flat wall 102 and a membrane 117 as will appear below, a second end 115 as for it free and constituting the brushing end, as well as an intermediate zone 116 immediately adjacent to the first end 114 and passing through the flat wall 102 via the corresponding bore 110.
  • the bristles of the tuft are free between the zone 116 of the latter and its end 115 while they are advantageously agglomerated in the zone 116, so that the latter has a stable cylindrical envelope of revolution around the axis 111 with a diameter as close as possible to that of the face 112 of the bore 106, and that it thus establishes between the face 112 and the tuft of bristles 113 a guide to the relative sliding along the axis 111 with a minimum of obstacles.
  • the bristles of the tuft are also agglomerated at the first end 114, which has transverse to the axis 111 dimensions greater than the diameter of the face 112 so that the first end 114 can, by pressing on the face 104 of the wall 2 around the bore 110, constitute a stop at against a sliding of the tuft 113 relative to the wall 102 in a direction going from the wall 104 towards the wall 103 parallel to the axis 111.
  • the tuft 113 has dimensions between its two ends 114 and 115 such that, when such a stop of the end 114 against the face 104 is established, the end 115 of the tuft forms with respect to the face 103 of the wall 102 and with respect to the intermediate zone 116 of the tuft a projection of a value suitable for imparting any desired flexibility to the hairs of the tuft.
  • the first end 114 of the tuft of hairs 113 forms with respect to the face 104, when this end 114 is in abutment on this face 104, a projection of value A intermediate between D and d, and closer to d than from D.
  • this same dimension A is found on each of the tufts 113 each of which thus forms a projection of value A - d relative to the flange 109, perpendicular to the face 104, when the respective first ends such as 114 of the different tufts such as 113 are in abutment against the face 104 of the wall 102.
  • the head 101 which has just been described integrally carries an attached cover 118 formed, like the brush head 101, of a flat wall 119 delimited in particular by two plane faces 135 and 136 plane and mutually parallel, and of a rim 120 projecting from the face 106 of the wall 119.
  • the rim 120 is fitted into the rim 105 of the brush head 101, and placed in contact with the inner peripheral face 106 of this rim 105.
  • Respective shoulders 122 and 123 of the edges 105 and 120 define, by a mutual stop advantageously accompanied by mutual joining for example by high frequency welding if the cover 118 and the brush head 101 are made of a plastic material, or by any other suitable means, a relative position of the cover 118 and the head 101 such that the face 136 of the wall 119, placed opposite the face 104, is parallel to the latter and spaced from this face 104 by a distance 8 greater at the sum of A and a current thickness e, of the membrane 117.
  • the face 136 has dimensions in plan at least equal to those of the face 104, so as to present a zone opposite each zone of this face 104 in a direction perpendicular thereto, so that it remains between the face 136 and the membrane 117, assumed to be applied to the respective ends such as 114 of the different tufts of bristles such as 113 themselves in abutment against the face 104 of the flat wall 102, a possibility of movement of the membrane 117 and first ends such as 114 tufts such as 113.
  • the rim 120 has a continuous edge face 125, parallel to the face 136, and which connects the outer peripheral face 121 of the rim 120 to an inner peripheral face 127 thereof, which connects the face 125 to the face 136 at least approximately perpendicular to either of these faces.
  • the edge face 125 of the flange 120 is placed opposite the groove 107 in a direction perpendicular to the virtual plane extension 108 of the face 104, and there remains between an edge 128 connecting this edge face 125 and the inner peripheral face 127 of the rim 120, on the one hand, the rim 109 on the other hand, a continuous annular space 129 having, perpendicular to the extensions respective 108 and 124 of the faces 104 and 136, that is to say also on the edge face 125, a thickness F-1 equal or approximately equal to the current thickness e, of the membrane 117.
  • the annular space 129 thus constitutes a narrowing in comparison with a space 130 defined jointly by the groove 107 and the face 125 of the rim 120, and this arrangement is used to immobilize, inside the groove 107 by means of the face 125 of the rim 120, a continuous peripheral bead 131 that the membrane 117 has in excess thickness with respect to its current thickness e ,.
  • the membrane 117 engages in the space 129 without its peripheral bead 131 being able to escape from the space 130.
  • the bead 131 has, when it is not trapped in the space 130, a geometry different from that of this space, so that its trapping in this space 130 results in an elastic compression of this bead, contributing to his restraint.
  • the membrane 117 is preferably chosen such that, when it is released from the brush head 101 and the cover 118, it has a flat shape, of constant current thickness e i except at the level of its continuous peripheral bead 131, so that the mounting of this membrane 117 in the brush head 101 and the imprisonment of the bead 131 in the space 130 result, by imposing a deflection of the membrane against the edge 128 on the one hand, and against the respective first ends such as 114 of the different tufts of hair such as 113 those closest to the rim 109, on the other hand, placing this membrane 17 in prestressing tension even when the respective first ends such as 114 of tufts of bristles such as 113 are in abutment against the face 104 of the wall 102.
  • the face 136 of the flat wall 119 and the face 127 of the rim 120 define, opposite the membrane 117 and all of the respective first ends such as 114 of the different tufts of bristles 113, a single, common cavity 132 towards which the membrane 117 can flex freely, locally, when one or other of the tufts of hair such as 113 is stressed by a force directed towards this cavity 132 approximately parallel to the corresponding axis 111, and exerts an elastic return on this tuft 113 to bring its first end 114 into abutment against the face 104 when such a stress stops.
  • the cavity 132 may be closed in a sealed manner, in particular by the membrane 117 and the cover 118 or, on the contrary, when the brush is intended to work in a liquid medium, ensuring a free circulation of this medium between the cavity 132 and the exterior thereof by suitably sized orifices, arranged for example in the cover 118.
  • FIG. 5 presents great analogies with those of FIG. 4, and FIG. 5 has been designated under the references 201 to 208, 210 to 224, 226 to 227, 231, 232, 235, 236, the elements described respectively under the references 101 to 108, 110 to 124, 126, 127, 131, 132, 135, 136 in connection with the variant illustrated in FIG. 4.
  • the groove 207 corresponding to the groove 107 is connected directly on the one hand to the inner peripheral face 206 of the flange 205, corresponding to the inner peripheral face 106 of the flange 105 , and on the other hand to the face 204 of the wall 202, corresponding to the face 104 of the face 102, in the absence of an equivalent to the flange 109 in the case of the variant of FIG. 5.
  • peripheral external 221 and internal 227 faces respectively of the rim 220 of the cover 218 are not connected to each other by a flat edge face like the face 125, but by two faces 233 , 234 defining for the rim 220 a beveled end 226 engaged in the groove 207 of the brush head 201 with the insertion of a continuous peripheral zone 237 of the membrane 217 including the bead 231, disposed around this continuous peripheral zone 237, is fitted into a continuous peripheral groove 238 that the outer peripheral face 221 of the rim 220 of the cover 218 has at its junction with the face 233, facing the face 206 of the rim 205 of the brush head 201, in a mean plane 239 intermediate between the respective planar extensions 208 and 224 of the faces 204 and 236 but closer to the extension 208 than to the extension 224.
  • the groove 207 has a flank face 241 parallel to the face 233 at a distance e 2 from the latter close to the current thickness e 1 of the membrane 217 but less than this thickness e 2 so as to ensure that the peripheral zone 237 of the membrane is clamped between the faces 233 and 241.
  • the face 241 thus joins the face 206 of the rim 205 to a flat bottom face 242, located opposite the edge 240 at the distance 92 from the latter, and this face 242 is connected to the face 204 by a face 243 placed opposite face 234 with a minimum mutual spacing of value e 2 .
  • the faces 243 and 234 diverge from each other in the direction of a distance from the edge 240 and from the face 242, and are oriented so that the membrane 217, bending against the edge 240 and in contact with the respective first ends such as 214 tufts of hair such as 213 closest to the groove 207, does not undergo any other deflection between these two deflections, as well when the first respective ends such as 214 of the tufts such as 213 closest to the groove 207 are in abutment against the face 204 of the wall 202, as illustrated, only when, under the action of a thrust applied to the ends such as 215 of these tufts such that 213, the membrane 217 is pushed back by the ends such as 214 of these tufts in its zone of deflection against these ends 214.
  • the membrane 217 can also have a flat conformation, when it is not fitted by its peripheral bead 231 in the groove 238 of the rim 220 of the cover 218 and bent against the edge 240 of on the one hand, and against the first ends such as 214, tufts of hair such as 213 closest to the throat 207.
  • the choice of the material constituting the membrane 5, and of the thickness thereof, can easily be made by a person skilled in the art as a function of the mechanical characteristics, in particular of elas ticity, to communicate to this membrane.
  • the material will advantageously be chosen from the group comprising elastomers of the natural or synthetic latex type, such as polychloroprene, natural rubber preferably treated so as to have improved resistance to aging, and silicones.
  • the thickness of the membrane in the relaxed state will generally vary on the order of 1 tenth of a mm to less than 1 mm in the case of toothbrushes, to then provide a possibility of amplitude of localized elastic deformation, known as point, of the membrane of the order of 0.5 mm to 5 mm for a force of the order of 2N (approximately 200 gf) to 7.5 N (approximately 750 gf) applied in a distributed manner to all the tufts of bristles along the respective mean directions thereof, that is to say along the respective axes of the corresponding bores.
  • this possible amplitude of localized elastic deformation of the membrane will be of the order of 3 mm under a pressure of the order of 6.10 4 Pa (approximately 6 gf / mm 2 ) between the tufts of bristles 3 and the teeth in the case of a brush comprising about thirty tufts, that is to say for a total effort of application of the brush on the teeth, in the average direction of the tufts, of the order of 2N (approximately 200 gf ), generally considered normal, the return of the membrane to its initial conformation after maximum point deformation, under normal conditions of use of the toothbrush, will be carried out in less than 1 second, and preferably in a time of l 1 tenth of a second.
  • the membrane will preferably be chosen so that all of the tufts retract under the action of a force of contact with the surface to be brushed, in an average direction of these tufts, considered to be usual, optimal in this application, and for each tuft to return to a non-shrunk state in a time compatible with the frequency of any irregularities in the surface to be brushed, taking account of a usual speed of course of it by the brush.

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Claims (15)

1. Bürste mit einem starren Bürstenkopf (1, 101, 201) und einer bestimmten Anzahl von Borstenbüscheln (3, 113, 213), von denen jedes ein erstes, in dem Bürstenkopf (1, 101, 201) eingeschlossenes Ende (14, 114, 214) und ein zweites, freies Ende (15, 115, 215), welches zum Kontakt mit einer zu bürstenden Oberfläche (17) bestimmt ist, aufweist, wobei der Bürstenkopf (1, 101, 201) aufweist:
- eine starre Wand (6, 102, 202) des Bürstenkopfes (1, 101, 201), welche eine erste Oberfläche (7, 104, 204), eine zweite Oberfläche (8, 103, 203) sowie eine Mehrzahl von Bohrungen (9, 110, 210) aufweist, welchletztere diese Wand (6, 102, 202) von ihrer ersten Oberfläche (7, 104, 204) bis zu der zweiten Oberfläche (8, 103, 203) entlang jeweils bestimmter Achsen (10, 111, 211) durchdringen, wobei die Bohrungen (9, 110, 210) in identischer Anzahl wie die Borstenbüschel (3, 113, 213) vorgesehen sind und wobei eine jede unter ihnen jeweils eines der Büschel (3, 113, 213) relativ entlang der jeweiligen Achse (10, 111, 211) verschiebbar aufnimmt, wobei dieses Büschel (3, 113, 213) dann entlang dieser Achse (10, 111, 211) ausgerichtet ist und mit seinem zweiten Ende (15, 115, 215) gegenüber der zweiten Oberfläche (8, 103, 203) der Wand (6, 102, 202) vorsteht und eine zwischen den genannten Enden (14, 15, 114, 115, 214, 215) in der jeweiligen Bohrung (9, 110, 210) liegende Zwischenzone (16, 116, 216) aufweist, wobei die Zwischenzone (16, 116, 216) und die Bohrung (9, 110, 210) quer zu der genannten Achse (10, 111, 211) jeweils komplementäre Querschnitte aufweisen,
- eine annähernd punktförmig elastisch deformierbare Membran (5, 117, 217), die über die erste Oberfläche (7, 104, 204) der Wand (6, 102, 202) gelegt ist, wobei sie den genannten Bohrungen (10, 110, 210) und den ersten Enden (14, 114, 214) der Büschel (3, 113, 213) gegenübersteht, von denen diese Membran (5, 117, 217) unabhängig ist, während sie eine Umfangszone (21, 131, 231, 237) aufweist, über deren Gesamtheit sie in gespanntem Zustand mit dem Bürstenkopf (1, 101, 201) verbunden ist,
- Mittel (4, 132, 232) zum Ermöglichen einer punktuellen elastischen Deformation der Membran (5, 117, 217) entgegengesetzt zu der ersten Oberfläche (7, 104, 204) der Wand (6, 102, 202), den Bohrungen (9, 110, 210) und den ersten Enden (14, 114, 214) der Büschel (3, 113, 213) gegenüberstehend,
- und Mittel zur wechselseitigen Abstützung (14, 13, 114, 104, 214, 204), welche die genannte Verschiebung in einer von der ersten Oberfläche (7, 104, 204) zu der zweiten Oberfläche (8, 103, 203) der Wand gehenden Richtung begrenzen, um einen Kontakt zwischen dem ersten Ende (14, 114, 214) eines jeden Büschels (3, 113, 213) und der Membran (5, 117, 217) herzustellen,

dadurch gekennzeichnet,
daß zur Ermöglichung der genannten punktuellen elastischen Deformation der Membran (5, 117, 217) der Bürstenkopf (1, 101, 201) eine Vertiefung (4, 132, 232) gegenüber der Anordnung der Bohrungen (9, 110, 210) der Wand (6, 102, 202) der Art aufweist, daß sie gemeinsam für die Anordnung der Bohrungen (9, 110, 210) entgegengesetzt zu der ersten Oberfläche (7, 104, 204) der Wand (6, 102, 202) in bezug auf die Membran (5, 117, 217) gegenüberliegt, und
daß die Membran (5, 117, 217) aus einem isotropen Material besteht und eine besondere Anisotropie der Art aufweist, daß sich die Borstenbüschel (3, 113, 213) unabhängig voneinander in das Innere der genannten Vertiefung (4, 132, 232) elastisch zurückziehen können.
2. Bürste nach Anspruch 1 dadurch gekennzeichnet, daß die Borsten eines jeden Büschels (3, 113, 213) in der genannten Zwischenzone jeweils dicht zusammengepreßt sind.
3. Bürste nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Mittel zur Abstützung (14, 13, 114, 104, 214, 204) eine Querschnittserhöhung des ersten Endes (14, 114, 214) eines jeden Büschels (3, 113, 213) in bezug auf die genannte Zwischenzone (16, 116, 216), quer bezüglich der genannten jeweiligen Achse (10, 111, 211) aufweisen.
4. Bürste nach Anspruch 3, dadurch gekennzeichnet, daß die Querschnittserhöhung durch Zusammenballung der Borsten des jeweiligen Büschels (3, 113, 213) gebildet ist.
5. Bürste nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß jede Bohrung (9) zwei Zonen (11, 12) aufweist, wobei diese Zonen quer zur genannten jeweiligen Achse unterschiedliche Querschnitte aufweisen, mit einer Zone (11), welche der zweiten Oberfläche (8) der Wand (6) benachbart ist und den genannten komplementären Querschnitt der Zwischenzone (16) des jeweiligen Büschels (3) aufweist, und mit einer Zone (12), welche der ersten Oberfläche (7) der Wand (6) benachbart ist und einen komplementären Querschnitt zu dem vergrößerten Querschnitt des ersten Endes (14) des jeweiligen Büschels (13) aufweist, wobei die beiden Zonen (11, 12) der Bohrung (9) wechselseitig durch einen Absatz (13) zur Abstützung für das genannte erste Ende (14) mit vergrößertem Querschnitt aneinander angepaßt sind.
6. Bürste nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Wand (6) auf den Kopf (1) aufgesetzt ist, wobei eine Einquetschung einer Umfangszone der Membran (15) zwischen ihnen bewirkt wird.
7. Bürste nach Anspruch 6, dadurch gekennzeichnet, daß die Wand (6) und der Kopf (1) wechselseitig um die erste Oberfläche (7) der Wand (6) herum unter Zwischenfügung einer Randzone (21) der Membran (5) ineinandergefügt sind.
8. Bürste nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Wand (102, 202) einen integrierenden Teil des Kopfes (101, 201) bildet und daß die Vertiefung (132, 232) durch einen Deckel (118, 218) begrenzt ist, der auf den Kopf (101, 201) mittels einer Quetschung einer Randzone (131, 231, 237) der Membran (117, 217) aufgesetzt ist.
9. Bürste nach Anspruch 8, dadurch gekennzeichnet, daß die genannte gequetschte Randzone (131) der Membran (117) einen an ihr umlaufenden Randwulst (131) umfaßt.
10. Bürste nach Anspruch 9, dadurch gekennzeichnet, daß die Membran um die genannte gequetschte Randzone (237) herum einen umlaufenden Randwulst (231) aufweist und daß der Deckel (218) eine umlaufende Randnut (238) zur Einfügung des genannten Randwulstes (231) aufweist.
11. Bürste nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Vertiefung (4, 132, 232) dicht abgeschlossen ist.
12. Bürste nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Vertiefung (4, 132, 232) offen ist.
13. Bürste nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Membran aus einem elastomeren Material besteht, welches aus der Gruppe ausgewählt ist, welche die Elastomere vom Latextyp, natürlich oder synthetisch, insbesondere Polychloropren (PCP), Naturkautschuk und die Silikone, umfaßt.
14. Bürste nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß die Membran (5, 117, 217) eine mögliche Amplitude für die punktuelle elastische Deformation in der Größenordnung von 0,5 bis 5 mm für eine Kraft in der Größenordnung von 2 bis 7,5 N besitzt, wobei diese Kraft verteilt auf die Anordnung der Borstenbüschel (3, 113, 213) entlang den entsprechenden Achsen (10, 111, 211) der zugehörigen Bohrungen (9, 110, 210) angelegt wird.
15. Bürste nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß die Membran eine Rückkehrzeit zur Ausgangsform von weniger als einer Sekunde, insbesondere in der Größenordnung von einer Zehntelsekunde nach einer maximalen punktuellen Deformation unter normalen Gebrauchsbedingungen der Bürste aufweist.
EP85400703A 1984-04-13 1985-04-09 Bürste mit federnd einziehbaren Borsten, insbesondere zum Bürsten von unregelmässigen Oberflächen, wie Zähnen Expired EP0159940B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85400703T ATE46253T1 (de) 1984-04-13 1985-04-09 Buerste mit federnd einziehbaren borsten, insbesondere zum buersten von unregelmaessigen oberflaechen, wie zaehnen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8405896A FR2562775B1 (fr) 1984-04-13 1984-04-13 Brosse a poils retractables elastiquement, notamment pour le brossage de surfaces de relief complexe telles que les dents
FR8405896 1984-04-13

Publications (3)

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EP0159940A2 EP0159940A2 (de) 1985-10-30
EP0159940A3 EP0159940A3 (en) 1987-05-27
EP0159940B1 true EP0159940B1 (de) 1989-09-13

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US (1) US4633542A (de)
EP (1) EP0159940B1 (de)
JP (1) JPS60232109A (de)
AT (1) ATE46253T1 (de)
CA (1) CA1255859A (de)
DE (1) DE3572919D1 (de)
ES (1) ES8700564A1 (de)
FR (1) FR2562775B1 (de)
PT (1) PT80267B (de)

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Also Published As

Publication number Publication date
PT80267B (pt) 1987-06-17
FR2562775A1 (fr) 1985-10-18
US4633542A (en) 1987-01-06
EP0159940A2 (de) 1985-10-30
JPS60232109A (ja) 1985-11-18
FR2562775B1 (fr) 1989-12-22
PT80267A (fr) 1985-05-01
ES8700564A1 (es) 1986-11-16
ES542095A0 (es) 1986-11-16
EP0159940A3 (en) 1987-05-27
DE3572919D1 (en) 1989-10-19
CA1255859A (fr) 1989-06-20
JPH0154045B2 (de) 1989-11-16
ATE46253T1 (de) 1989-09-15

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