EP1625808B1 - Brosse interdentaire et procede de production correspondant - Google Patents

Brosse interdentaire et procede de production correspondant Download PDF

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Publication number
EP1625808B1
EP1625808B1 EP04733477A EP04733477A EP1625808B1 EP 1625808 B1 EP1625808 B1 EP 1625808B1 EP 04733477 A EP04733477 A EP 04733477A EP 04733477 A EP04733477 A EP 04733477A EP 1625808 B1 EP1625808 B1 EP 1625808B1
Authority
EP
European Patent Office
Prior art keywords
sub
interdental brush
main body
lateral hole
wire
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
EP04733477A
Other languages
German (de)
English (en)
Other versions
EP1625808A4 (fr
EP1625808A1 (fr
Inventor
Tokuji Okamura
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.)
UFC Supply KK
Original Assignee
UFC Supply KK
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 UFC Supply KK filed Critical UFC Supply KK
Publication of EP1625808A1 publication Critical patent/EP1625808A1/fr
Publication of EP1625808A4 publication Critical patent/EP1625808A4/fr
Application granted granted Critical
Publication of EP1625808B1 publication Critical patent/EP1625808B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • 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
    • 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
    • A46B2200/108—Inter-dental toothbrush, i.e. for cleaning interdental spaces specifically

Definitions

  • the present invention relates to an interdental brush and a method of producing the same.
  • an interdental brush of this type there is known one composed of bristles, a wire with which the bristles are twisted, and a handle to which the wire is attached, wherein a coming-off preventing bent portion is formed at the base part of the wire, and mounting of the wire to the handle is realized by insert resin molding, see, for example, Japanese Utility-model Application Laid-open No. 62-174423 or JP2001204549 A .
  • An object of the present invention is to provide cheap interdental brushes and a producing method capable of producing them.
  • An interdental brush according to the present invention comprises: bristles; a wire with which the bristles are twisted; and a handle attached to the wire.
  • the handle consists of a main body and a sub-body.
  • the main body is provided with a longitudinal hole into which a base part of the wire is inserted, and a lateral hole intersecting the longitudinal hole.
  • the base part of the wire is provided with a coming-off preventing bent portion formed to be exposed to the lateral hole.
  • the sub-body is provided with an engagement portion filling the lateral hole so as to surround the periphery of the bent portion.
  • interdental brush of this invention it is possible to produce it by simple resin molding without using insert resin molding. Therefore, cheap interdental brushes are provided.
  • main body and the sub-body are made of synthetic resin, fitting characteristics between resin are high, whereby it is possible to strengthen the bonding power between the main body and the sub-body.
  • the main body comprises a shoulder part, a tail part and a barrel part communicating the shoulder part and the tail part via a low step
  • the lateral hole is positioned in the barrel part
  • the sub-body covers the barrel part, and the boundaries between the surfaces of the shoulder part and the tail part and the surface of the sub-body adjacent thereto are flush with each other, it is possible to provide a smooth image in the handle as a whole, which contributes to improving the merchantability.
  • a method of producing an interdental brush according to the present invention comprises the steps of: forming, by primary resin molding, a main body of a handle having a longitudinal hole and a lateral hole intersecting the longitudinal hole; inserting a base part of a wire, with which bristles are twisted, into the longitudinal hole so as to be exposed to the lateral hole; forming a coming-off preventing bent portion at the base part of the wire via the lateral hole; and forming, by secondary resin molding, a sub-body of the handle such that a part thereof fills the lateral hole so as to surround the periphery of the bent portion.
  • an interdental brush of the present invention it is possible to produce bristles, a wire and an handle in different steps, which enables to produce an interdental brush in simple steps. Therefore, the cost of producing an interdental brush is low.
  • the step of forming the bent part is performed by inserting a rod-shaped jig J into the lateral hole and pressing the tip part of the jig J onto a to-be-bent portion of the base part of the wire, a part of the role of the jig for forming the bent portion is taken by the main body, and also forming of the bent part itself is easy.
  • the material cost can be saved, and also management of the producing steps can be easily carried out.
  • different materials may be used in the primary resin molding and in the secondary resin molding.
  • inside and outside are assumed to mean that, based on Figs. 1 to 3 , the upper side is the front and the lower side is the outside. Further, left and right mean the right side and the left side of Fig. 2 , and top and bottom mean the left side and the right side of Fig 3 , respectively.
  • a interdental brush is composed of nylon bristles 11, a stainless wire 12 and a handle 13 made of thermoplastic synthetic resin.
  • the bristles 11 are divided into plural bundles.
  • the bundles of the bristles 11 are held by bundles in between the two-folded wire 12, which are twisted with the wire 12.
  • a twisted wire with bristles 14 having a tip part with the filled bristles 11 and a base part without the bristles 11 is configured.
  • the handle 13 consists of a main body 21 and a sub-body 22.
  • the main body 21 and the sub-body 22 are formed by injection molding of polyethylene.
  • the main body 21 and the sub-body 22 may be made of the same material or different materials.
  • the main body 21 may be made of polyethylene
  • the sub-body 22 may be made of synthetic resin having rubber characteristics such as EPDM, for example.
  • the main body 21 is in a linear rod shape extending in the inside and outside direction as a whole, and is composed of a substantially inward conical shoulder part 31, a round rod-shaped barrel part 32, and a cylindrical tail part 33. From the inner end of the shoulder part 31, a narrow round rod-shaped neck part 34 is protruded toward the inner side.
  • a shoulder side step 35 which is lower than the shoulder part 31.
  • a tail side step 36 which is lower than the tail part 33.
  • the shoulder side step 35 is composed of dented U-shaped portions 37 opened to the tail part viewed from the up and down direction, and two protruded reverse U-shaped portions 38 communicating the tips of the both U-shaped parts 37.
  • the tail side step 36 is formed of a ring part 39 continued around the whole periphery of the main body 21.
  • a longitudinal hole 41 is formed from the tip of the neck part 34 up to the inner end of the barrel part 32 through the barrel part 32 in the inside and outside direction.
  • the diameter of the longitudinal hole 41 has a size enabling the twisted wire with bristles 14 to be inserted loosely.
  • Two lateral holes 42 and 43 are formed, in parallel in the inside and outside direction, intersecting the longitudinal hole 41 so as to penetrate the barrel part 32 in the up and down direction.
  • rectangle ridges 44 longitudinal in the inside and outside direction are formed on the both upper and lower side faces of the barrel part 32, and on both of the left and right side faces of the barrel part 32, circular protrusions 45 are formed, three for each side, in parallel in the inside and outside direction.
  • the base part of the twisted wire with bristles 14 is inserted so as to be exposed to the two lateral holes 42 and 43.
  • a V-shaped bent portion 51 is formed at a position facing the outside lateral hole 43 of the base part.
  • the sub-body 22 is formed so as to cover the whole surface of the barrel part 32.
  • a part of the sub-body 22 fills the two lateral holes 42, and 43.
  • the periphery of the bent portion 51 is surrounded by the sub-body 22 which constitutes an engagement portion 52 with respect to the bent portion 51.
  • the steps are embedded with the sub-body 22. Thereby, the boundaries between the surfaces of the shoulder part 31 and the tail part 33 and the surface of the sub-body 22 adjacent thereto are flush with each other. Further, the tip parts of the ridges 44 and the protrusions 45 are exposed to the surface of the sub-body 22.
  • the colors of the resin forming the main body 21 and the sub-body 22 differs to each other. For example, if the main body 21 is blue and the sub-body 22 is white in color, the handle 13 is colored with fresh two-tone colors.
  • the main body 21 is made by primary molding.
  • the longitudinal hole 41 and the lateral holes 42 and 43 are formed at the same time.
  • the base part of the twisted wire with bristles 14, which has been formed by molding separately, is inserted into the lateral holes 42 and 43.
  • a rod-shaped jig J is inserted into the lateral holes 42 and 43, and the tip of the jig J presses a part to be the bent portion 51 of the base part of the twisted wire with bristles 14 so as to deform the part to form the bent portion 51.
  • the sub-body 22 is formed by secondary molding. The main body 21 and the sub-body 22 are fixed to each other, so there is no need to worry about separation.

Landscapes

  • Brushes (AREA)

Claims (12)

  1. Brosse interdentaire comprenant :
    des poils (11) ;
    un fil métallique (12) avec lequel les poils (11) sont torsadés ; et
    une poignée (13) fixée au fil métallique, dans laquelle
    la partie de base du fil métallique (12) est pourvue d'une partie pliée d'empêchement de sortie (51),
    la poignée (13) comprend un corps principal (21) et un corps secondaire (22),
    le corps principal (21) est pourvu d'un trou longitudinal (41) dans lequel est insérée une partie de base du fil métallique (12),
    caractérisée en ce que le corps principal (21) est pourvu d'un trou latéral (43) croisant le trou longitudinal (41),
    la partie pliée (51) étant formée de façon à être exposée au trou latéral (43), et
    le corps secondaire (22) est pourvu d'une partie d'engagement (52) remplissant le trou latéral (43) de façon à entourer une périphérie de la partie pliée (51).
  2. Brosse interdentaire selon la revendication 1, dans laquelle une partie d'une surface du corps principal (21) est recouverte du corps secondaire (22), et des propriétés de discrimination du corps principal (21) et du corps secondaire (22) sont différentes les unes des autres.
  3. Brosse interdentaire selon la revendication 2, dans laquelle le corps principal (21) et le corps secondaire (22) sont faits de résine synthétique.
  4. Brosse interdentaire selon la revendication 2, dans laquelle une différence entre les propriétés de discrimination provient d'au moins un élément parmi la couleur, la brillance et la matière.
  5. Brosse interdentaire selon la revendication 1, dans laquelle le corps principal (21) comprend une partie formant épaulement (31), une partie formant queue (33) et une partie formant fût (32) faisant communiquer la partie formant épaulement (31) et la partie formant queue (33) par l'intermédiaire d'un gradin bas,
    le trou latéral (43) est positionné dans la partie formant fût (32),
    le corps secondaire (22) recouvre la partie formant fût (32), et
    les frontières entre les surfaces de la partie formant épaulement (31) et la partie formant queue (32) et une surface du corps secondaire (22) adjacente à ces parties sont mutuellement au même niveau.
  6. Brosse interdentaire selon la revendication 2, dans laquelle le corps principal (21) comprend une partie formant épaulement (31), une partie formant queue (33) et une partie formant fût (32) faisant communiquer la partie formant épaulement (31) et la partie formant queue (33) par l'intermédiaire d'un gradin bas,
    le trou latéral (43) est positionné dans la partie formant fût (32),
    le corps secondaire (22) recouvre la partie formant fût (32), et
    les frontières entre les surfaces de la partie formant épaulement (31) et la partie formant queue (32) et une surface du corps secondaire (22) adjacente à ces parties sont mutuellement au même niveau.
  7. Brosse interdentaire selon la revendication 3, dans laquelle le corps principal (21) comprend une partie formant épaulement (31), une partie formant queue (33) et une partie formant fût (32) faisant communiquer la partie formant épaulement (31) et la partie formant queue (33) par l'intermédiaire d'un gradin bas,
    le trou latéral (43) est positionné dans la partie formant fût (32),
    le corps secondaire (22) recouvre la partie formant fût (32), et
    les frontières entre les surfaces de la partie formant épaulement (31) et la partie formant queue (32) et une surface du corps secondaire (22) adjacente à ces parties sont mutuellement au même niveau.
  8. Brosse interdentaire selon la revendication 4, dans laquelle le corps principal (21) comprend une partie formant épaulement (31), une partie formant queue (33) et une partie formant fût (32) faisant communiquer la partie formant épaulement (31) et la partie formant queue (33) par l'intermédiaire d'un gradin bas,
    le trou latéral (43) est positionné dans la partie formant fût (32),
    le corps secondaire (22) recouvre la partie formant fût (32), et
    les frontières entre les surfaces de la partie formant épaulement (31) et la partie formant queue (32) et une surface du corps secondaire (22) adjacente à ces parties sont mutuellement au même niveau.
  9. Procédé de production d'une brosse interdentaire comprenant les étapes consistant à :
    former, par un premier moulage de résine, un corps principal (21) d'une poignée (13) ayant un trou longitudinal (41) et un trou latéral (43) croisant le trou longitudinal (41) ;
    insérer une partie de base d'un fil métallique (12), avec lequel les poils (11) sont torsadés, dans le trou longitudinal (41), de façon qu'elle soit exposée au trou latéral (43) ;
    former une partie pliée d'empêchement de sortie (51) au niveau de la partie de base du fil métallique (12) à travers le trou latéral (43) ; et
    former, par un deuxième moulage de résine, un corps secondaire (22) de la poignée (13) de telle sorte qu'une partie de celui-ci remplisse le trou latéral (43) de façon à entourer une périphérie de la partie pliée (51).
  10. Procédé de production de la brosse interdentaire selon la revendication 9, dans lequel l'étape de formation de la partie pliée (51) est effectuée par insertion d'un élément de montage en forme de tige J dans le trou latéral (43) et pressage d'une partie d'extrémité de l'élément de montage J sur une partie destinée à être pliée de la partie de base du fil métallique (12).
  11. Procédé de production de la brosse interdentaire selon la revendication 9, dans lequel le même matériau est utilisé dans le premier moulage de résine et le deuxième moulage de résine.
  12. Procédé de production de la brosse interdentaire selon la revendication 10, dans lequel le même matériau est utilisé dans le premier moulage de résine et le deuxième moulage de résine.
EP04733477A 2003-05-20 2004-05-17 Brosse interdentaire et procede de production correspondant Expired - Lifetime EP1625808B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003141810A JP3886050B2 (ja) 2003-05-20 2003-05-20 歯間ブラシおよびその製造方法
PCT/JP2004/007004 WO2004103118A1 (fr) 2003-05-20 2004-05-17 Brosse interdentaire et procede de production correspondant

Publications (3)

Publication Number Publication Date
EP1625808A1 EP1625808A1 (fr) 2006-02-15
EP1625808A4 EP1625808A4 (fr) 2006-10-11
EP1625808B1 true EP1625808B1 (fr) 2008-05-28

Family

ID=33475037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04733477A Expired - Lifetime EP1625808B1 (fr) 2003-05-20 2004-05-17 Brosse interdentaire et procede de production correspondant

Country Status (7)

Country Link
US (1) US20060179593A1 (fr)
EP (1) EP1625808B1 (fr)
JP (1) JP3886050B2 (fr)
CN (1) CN100387169C (fr)
DE (1) DE602004014132D1 (fr)
HK (1) HK1091699A1 (fr)
WO (1) WO2004103118A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
USD816999S1 (en) 2017-03-06 2018-05-08 Ranir, Llc Toothbrush

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD816999S1 (en) 2017-03-06 2018-05-08 Ranir, Llc Toothbrush

Also Published As

Publication number Publication date
EP1625808A4 (fr) 2006-10-11
JP2004344229A (ja) 2004-12-09
HK1091699A1 (en) 2007-01-26
CN1774191A (zh) 2006-05-17
DE602004014132D1 (de) 2008-07-10
JP3886050B2 (ja) 2007-02-28
CN100387169C (zh) 2008-05-14
WO2004103118A1 (fr) 2004-12-02
EP1625808A1 (fr) 2006-02-15
US20060179593A1 (en) 2006-08-17

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