US20120233791A1 - Brush body and toothbrush - Google Patents

Brush body and toothbrush Download PDF

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Publication number
US20120233791A1
US20120233791A1 US13/512,899 US201013512899A US2012233791A1 US 20120233791 A1 US20120233791 A1 US 20120233791A1 US 201013512899 A US201013512899 A US 201013512899A US 2012233791 A1 US2012233791 A1 US 2012233791A1
Authority
US
United States
Prior art keywords
bristle
core
brush body
oral cavity
electrode
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.)
Abandoned
Application number
US13/512,899
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English (en)
Inventor
Satoshi Uchida
Masayoshi Nagayama
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.)
Valtion Teknillinen Tutkimuskeskus
Panasonic Corp
Panasonic Electric Works Co Ltd
Original Assignee
Panasonic Electric Works Co Ltd
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 Panasonic Electric Works Co Ltd filed Critical Panasonic Electric Works Co Ltd
Assigned to PANASONIC CORPORATION reassignment PANASONIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAGAYAMA, MASAYOSHI, UCHIDA, SATOSHI
Assigned to TEKNOLOGIAN TUTKIMUSKESKUS VTT reassignment TEKNOLOGIAN TUTKIMUSKESKUS VTT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MATTILA, PIPSA, FORSMAN, JOHANNA, AUVINEN, ARI, JOKINIEMI, JORMA, TAPPER, UNTO
Publication of US20120233791A1 publication Critical patent/US20120233791A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
    • A46B15/0016—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means
    • A46B15/0022—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means with an electrical means
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0207—Bristles characterised by the choice of material, e.g. metal
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

Definitions

  • the present invention relates to toothbrushes for oral care provided with an energizing function and to brush bodies used for such toothbrushes.
  • toothbrushes for oral care provided with an energizing function have been proposed in the prior art.
  • patent documents 1 to 3 listed below disclose toothbrushes that generate chlorine, which has a sterilization effect, from chloride ions included in an oral cavity fluid, such as saliva.
  • the toothbrush of patent document 1 includes a first electrode, which is arranged proximal to a brush head where bristles (brush bristles) are embedded, and a second electrode, which is arranged in a grip of the toothbrush.
  • the first electrode, the second electrode, the human body, and the oral cavity fluid form an electric circuit that generates chlorine through electrolysis of the oral cavity fluid near the first electrode of the brush head.
  • the toothbrushes illustrated in patent documents 2 and 3 each include first and second electrodes that are both arranged in a brush head where bristles (brush bristles) are embedded. During use of the toothbrush, an electric circuit formed in the oral cavity between the first and second electrodes generates chlorine through electrolysis of the oral cavity fluid near the first electrode of the brush head.
  • FIG. 7 of patent document 1 discloses another example Paragraph 0033 of patent document 2 and paragraph 0041 of patent document 3 describe further examples in which the bristles are entirely used as electrodes.
  • Patent document 4 illustrates a toothbrush using parts of bristles as electrodes in the same manner as the structure shown in FIG. 7 of patent document 1.
  • Each bristle has a double-layer structure including a conductive core and an insulative sheath.
  • the electrodes of the bristles in patent document 4 detect plaque.
  • Patent document 5 discloses a toothbrush that energizes the oral cavity through a conductive body arranged in a brush head, which supports bristles, to perform sterilization and promote blood circulation in the gum.
  • Patent document 6 discloses an ion toothbrush including a conductive member partially exposed through a window in the brush head and having an electric effect that weakens the bonding of teeth surface and plaque to facilitate the removal of plaque.
  • Patent document 7 discloses an electronic toothbrush that supplies pulse current to bristles in order to draw fluorine ions into the teeth surface.
  • Patent Document 1 Japanese Laid-Open Patent Publication No. 6-90824
  • Patent Document 2 Japanese Laid-Open Patent Publication No. 2006-102095
  • Patent Document 3 Japanese Laid-Open Patent Publication No. 2006-180953
  • Patent Document 4 Japanese National Phase Laid-Open Patent Publication No. 2000-504605
  • Patent Document 5 Japanese Laid-Open Patent Publication No. 60-45362
  • Patent Document 6 Japanese Laid-Open Patent Publication No. 2001-309820
  • Patent Document 7 Japanese Laid-Open Patent Publication No. 2006-223369
  • the electrode may not be sufficiently immersed in oral cavity fluid, which forms part of the electric circuit, and the generation of chlorine may become insufficient. Further, the electrode of the brush head is separated from periodontal pockets. Thus, chlorine cannot be directly supplied to the periodontal pockets, and effective sterilization of the periodontal pockets cannot be performed.
  • the bristles be used as the electrode like patent document 6 and the further examples of patent documents 1 to 3.
  • the bristles are entirely used as electrodes.
  • the bristles entirely diffuse current to the entire oral cavity through the oral cavity fluid.
  • the odor of the large amount of generated chlorine becomes a problem.
  • sufficient chlorine may not be locally supplied to the periodontal pockets.
  • each bristle functions as the electrode.
  • each bristle is relatively thin.
  • the exposed area of the flat distal end surface is insufficient for electrolysis, and sufficient chlorine may not be generated.
  • each bristle is used to detect plaque.
  • the electrode is not suitable for being energized for oral care.
  • the toothbrushes of patent documents 5 and 6 include electrodes in the brush heads and that have the same problem as patent documents 1 to 3.
  • the object of the electronic toothbrush of patent document 7 is to supply fluorine ions to the teeth surface and is not intended for locally energizing periodontal pockets. Rather, in the case of the electronic toothbrush of patent document 7, it is preferable that the entire surface of each bristle function as an electrode so that contact occurs more frequently with the teeth surface.
  • the present invention solves the above problems. It is an object of the present invention to provide a brush body and a toothbrush that selectively performs localized energizing for oral care at gaps in the oral cavity such as periodontal pockets.
  • the plurality of bristle bundles includes a bristle that includes a core, which is formed by a conductive member, and a sheath, which covers the core and is formed by an insulative member.
  • the core projects from the sheath at a tip portion of the bristle and functions as an electrode that energizes an oral cavity.
  • a portion inserted into the oral cavity is at least partially covered by the insulative member.
  • the brush body includes a front surface on which the bristle bundles are embedded and a rear surface opposite to the front surface.
  • the insulative member covers at least the rear surface.
  • the portion inserted into the oral cavity excluding the tip portion of the bristle is covered by an insulative member.
  • the tip portion of the bristle has a pointed shape, and at least part of the pointed shape is formed by the core.
  • the tip portion of the bristle has a semispherical shape, and at least part of the semispherical shape is formed by the core.
  • the sheath of the bristle is formed by a material having a lower hardness than a material that forms the core.
  • the electrode generates chlorine having a sterilization effect through electrolysis of oral cavity fluid that is proximal to the electrode.
  • a further aspect of the present disclosure provides a toothbrush including the brush body of the first aspect and an energizing means for supplying the electrode of the bristle with current for local energizing.
  • the toothbrush includes an oscillation actuator that oscillates the brush head, on which the bristle bundles are embedded.
  • the present invention provides a brush body and toothbrush that selectively performs localized energizing for oral care at gaps in the oral cavity such as periodontal pockets.
  • FIG. 1 is a schematic cross-sectional view showing the structure of a toothbrush in an embodiment
  • FIG. 2 is a cross-sectional view showing a brush body of the toothbrush of FIG. 1 ;
  • FIG. 3 is a cross-sectional view showing a brush body in a further example
  • FIG. 4 is a cross-sectional view showing a tip portion of a bristle in a further example.
  • FIG. 5 is a cross-sectional view showing a brush body in a further example.
  • a toothbrush 10 of the present invention includes a main body, or grip 11 , which can be held by a user, and a brush body 21 , which can be attached in a removable manner to a distal portion of the grip 11 .
  • the brush body 21 includes a brush stem 22 and a brush head 23 .
  • Bristle bundles 24 are embedded on the brush head 23 .
  • An oscillation actuator 13 in the grip 11 drives and oscillates the brush head 23 in an axial direction (longitudinal direction) to electrically perform brushing or the like.
  • the brush stem 22 and the brush head 23 may also be referred to as insulative members.
  • the grip 11 of the toothbrush 10 may be generally cylindrical so that it is easy to hold.
  • the grip 11 has an outer surface including a grip electrode 12 , which comes into contact with the user who is holding the grip 11 , and a switch (not shown).
  • the oscillation actuator 13 a battery 14 , which is formed by a rechargeable battery or a primary battery, and a control circuit (circuit substrate) 15 , which controls the supply of power from the battery 14 to the oscillation actuator 13 based on the operation of the switch, are arranged in the grip 11 .
  • the oscillation actuator 13 includes an output shaft 13 a, which projects out of the distal portion of the grip 11 .
  • the brush body 21 (basal portion of the brush stem 22 ) is attached to cover the projected output shaft 13 a.
  • the brush head 23 of the brush body 21 includes the bristle bundles 24 to remove plaque and the like.
  • Each bristle bundle 24 includes a basal portion fixed to the brush head 23 .
  • filaments or bristles 25 are bundled.
  • Each bundle is folded in a U-shaped manner so as to sandwich a metal holding plate 26 . The folded portion of each bundle and the holding plate 26 are pressed together into brush head 23 to fix or embed the bristle bundles 24 to the brush head 23 .
  • each bristle 25 has a double-layer structure including a core 25 x, which is formed from a flexible conductive resin (for example, polyamide resin containing carbon or polybutylene terephthalate resin containing carbon), and a sheath 25 y, which covers the core 25 x and is formed from a flexible insulative resin (for example, polyamide resin that does not contain carbon or polybutylene terephthalate resin that does not contain carbon).
  • the insulative resin forming the sheath 25 y and the conductive resin forming the core 25 x are both flexible materials (elastic materials). It is preferable that the resin forming the sheath 25 y have a lower hardness than the resin forming the core 25 x.
  • Each bristle 25 includes a generally conical or pointed tip portion 25 a.
  • the tip portion 25 a is formed by the core 25 x that projects from the sheath 25 y.
  • the core 25 x includes a generally conical or pointed distal end that is not covered by the sheath 25 y.
  • the projected length of the bristle 25 from the brush head 23 is preferable set to about 10 mm or greater, for example, about 20 mm.
  • the length of the generally conical or pointed portion is set to about 2 mm
  • the diameter of each bristle 25 is set to about 0.2 mm
  • the thickness of the sheath 25 y is set to about 0.06 mm.
  • the core 25 x is illustrated with a slightly exaggerated diameter. The dimensions are not limited in the above-described manner.
  • each of the bristles 25 is electrically connected by the metal holding plate 26 to a conductive base 27 in the brush head 23 .
  • the base 27 is formed by a conductive resin
  • the brush head 23 excluding the base 27 , and the brush stem 22 are formed from an insulative resin.
  • the conductive base 27 is electrically connected to the output shaft 13 a of the oscillation actuator 13 by a connection terminal 28 that is arranged extending along the brush stem 22 .
  • the grip electrode 12 of the grip 11 is also connected to the control circuit 15 .
  • the core 25 x of each bristle 25 functions as a first electrode
  • the grip electrode 12 functions as a second electrode.
  • the oscillation actuator 13 drives and oscillates the brush head 23 . This improves the brushing capability and produces a massaging effect on the gum.
  • the control circuit 15 applies a DC voltage of, for example, 15 V. Based on the applied voltage, the tip portion 25 a of the bristle 25 performs local energizing for oral care with the oral cavity fluid around the core 25 x.
  • the brush body 21 can perform concentrated oral care at gaps in the oral cavity.
  • the shape of the projection of the core 25 x increases the energizing area and thus ensures sufficient energizing area for local energizing.
  • the conductive portion is only the core 25 x at the tip portion 25 a, and other parts of the brush body 21 excluding the core 25 x at the tip portion 25 a are covered by the insulative members. Thus, unnecessary current diffusion is prevented, and current can be concentrated at the core 25 x of the tip portion 25 a.
  • the brush body 21 achieves these effects at the same time and can thus selectively perform local energizing for oral care in at least gaps in the oral cavity.
  • An energizing means of the toothbrush 10 includes, in particular, the control circuit 15 and the core 25 x.
  • the present embodiment has the characteristic advantages described below.
  • the bristles 25 embedded in the brush head 23 each includes the core 25 x, which is formed by a conductive member, and the sheath 25 y, which is formed by an insulative member that covers the core 25 x.
  • the core 25 x projecting from the sheath 25 y at the tip portion 25 a of the bristle 25 functions as an electrode. That is, the core 25 x projects from the sheath 25 y at the tip portion 25 a of the bristle 25 .
  • the distal end of the core 25 x can enter gaps in the oral cavity, such as periodontal pockets.
  • the distal end of the core 25 x can perform concentrated local energizing for oral care in gaps in the oral cavity.
  • the exposed conductive portions are only the cores 25 x in the tip portion 25 a.
  • the other parts of the tip portion 25 a excluding the cores 25 x are covered by the insulative member. This prevents the diffusion of unnecessary current and concentrated current at the core 25 x in the tip portion 25 a.
  • the brush body 21 achieves these effects at the same time.
  • local energizing for oral care can be performed further effectively at gaps in the oral cavity such as periodontal pockets.
  • the cores 25 x in the tip portion 25 a directly contact the teeth surface and the gum.
  • the brush body 21 can separately and locally energize various portions in the oral cavity such as the teeth surface and the gum. Accordingly, the brush body 21 selectively obtains a desirable oral care effect for the user at portions in the oral cavity intended by the user.
  • the oral care effect of the local energizing achieves one or more, preferably, all of sterilization, blood circulation promotion of the gum, the drawing of ions into the teeth surface, and the promotion of plaque removal.
  • the brush body 21 is covered by an insulative member excluding the tip portions 25 a of the bristles 25 . This ensures prevention of unnecessary current diffusion from the brush body 21 and further increases efficiency of local energizing for oral care.
  • the tip portion 25 a of the bristle 25 has a pointed structure, and the core 25 x is projected from the sheath 25 y.
  • the core 25 x of the tip portion 25 a can perform local energizing by deeply entering gaps in the oral cavity such as periodontal pockets.
  • the shape of the core 25 x is effective for sterilizing bacteria in gaps in the oral cavity.
  • the sheaths 25 y of the bristles 25 are formed by a flexible material having a lower hardness than the cores 25 x. This softens contact of the bristles 25 with the gum or the like and lessens the stimuli received by the user.
  • the brush body 21 is applied to the toothbrush 10 that includes the oscillation actuator 13 . This improves the brushing capability and produces a massaging effect on the gum.
  • the bristles 25 (bristle bundles 24 ) embedded in the brush head 23 all have a double-layer structure of an electrode, or the core 25 x, and the sheath 25 y.
  • Such bristles 25 which include electrodes, may be selectively used for only predetermined bristle bundles 24 or be selectively used as predetermined bristles 24 in a bristle bundle 24 .
  • the entire brush body 21 excluding the tip portions 25 a of the bristles 25 is covered by insulative members.
  • the brush head 23 and the brush stem 22 may partially be covered by insulative members to prevent unnecessary current diffusion.
  • the brush body 21 includes a front surface (also referred to as brush surface), on which the bristle bundles 24 are embedded, and a rear surface, which is opposite to the front surface.
  • the rear surface is covered by a rear surface coating 21 y, which is formed from an insulative resin.
  • the rear surface of the brush body 21 is apt to coming into contact with the wall surface of the oral cavity during use.
  • the rear surface coating 21 y which is an insulative member, unnecessary current diffusion may be prevented in a preferable manner while decreasing the area and used amount of the insulative member. This also contributes to increasing the efficiency of local energizing.
  • the shape of the base 27 which is formed from conductive resin and connected to the bristle bundles 24 , is enlarged.
  • the tip portion 25 a of each bristle 25 has a pointed shape, and the core 25 x projects from the sheath 25 y.
  • the shape of the tip portion 25 a of the bristle 25 may be changed as required.
  • the tip portion 25 a of the bristle 25 may be semispherical, and the core 25 x may project from the sheath 25 y. This softens contact of the tip portion 25 a of the bristle 25 with the gum or the like and lessens the stimuli during use.
  • the core 25 x projecting from the sheath 25 y may simply be cylindrical.
  • the sheath 25 y of the bristle 25 has a lower hardness than the core 25 x but is not limited in such a manner.
  • the sheath 25 y and the core 25 x may have about the same hardness.
  • the bristle bundles 24 are folded in a U-shaped manner so as to sandwich the metal holding plates 26 .
  • basal ends of the bristle bundles 24 may be embedded in the brush head 23 without bending the bristle bundles 24 (without using the holding plates 26 ).
  • saliva is illustrated as one example of oral cavity fluid.
  • the oral cavity fluid may be a solution other than saliva such as a solution including chloride ions or an oral cavity care solution.
  • the electrode may generate chlorine, which has a sterilization effect, through electrolysis of the oral cavity fluid near the electrode.
  • the brush body 21 is supported so that it can be attached in a removable manner to the grip 11 .
  • the brush body 21 may be formed integrally with the grip 11 .
  • the oscillation actuator 13 may be eliminated.
US13/512,899 2009-12-22 2010-12-20 Brush body and toothbrush Abandoned US20120233791A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2009-290467 2009-12-22
JP2009290467 2009-12-22
PCT/JP2010/072918 WO2011078127A1 (ja) 2009-12-22 2010-12-20 ブラシ体及び歯ブラシ

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US20120233791A1 true US20120233791A1 (en) 2012-09-20

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US13/512,899 Abandoned US20120233791A1 (en) 2009-12-22 2010-12-20 Brush body and toothbrush

Country Status (5)

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US (1) US20120233791A1 (ja)
EP (1) EP2517601A1 (ja)
JP (1) JPWO2011078127A1 (ja)
CN (1) CN102791166A (ja)
WO (1) WO2011078127A1 (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2013407533B2 (en) * 2013-12-12 2017-01-12 Colgate-Palmolive Company Multi-component bristle having components with different oral care additives, and oral care implement comprising the same
US20190008271A1 (en) * 2015-12-28 2019-01-10 Colgate-Palmolive Company Brush with Fluid Delivery
US10702057B2 (en) 2015-07-07 2020-07-07 Colgate-Palmolive Company Oral care implement and monofilament bristle for use with the same
EP4018881A1 (en) * 2020-12-22 2022-06-29 Koninklijke Philips N.V. Cleaning and/or treatment unit for an oral care device
US11547202B2 (en) * 2014-07-31 2023-01-10 Geka Gmbh Wire-core applicator having multi-material bristles
WO2023038207A1 (ko) * 2021-09-08 2023-03-16 주식회사 프록시헬스케어 전기 칫솔
US11618126B2 (en) * 2019-08-30 2023-04-04 Taiwan Semiconductor Manufacturing Company Limited Polishing pad conditioning apparatus
US11812845B2 (en) 2020-06-15 2023-11-14 Church & Dwight Co., Inc. Ionic toothbrush

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JP2013118895A (ja) * 2011-12-06 2013-06-17 Lion Corp 口腔内用イオンブラシ
EP3547956A1 (en) * 2016-12-01 2019-10-09 Koninklijke Philips N.V. Oral care device and attachment
WO2019011601A1 (en) * 2017-07-12 2019-01-17 Koninklijke Philips N.V. BRUSH HEAD ARRANGEMENTS
DE102017120902A1 (de) * 2017-09-11 2019-03-14 Cinogy Gmbh Plasma-Behandlungsgerät
CN110292454A (zh) * 2019-08-06 2019-10-01 深圳市欣点通科技有限公司 一种多功能电动牙刷
EP3915515A1 (en) * 2020-05-28 2021-12-01 Koninklijke Philips N.V. Cleaning and/or treatment unit for an oral cleaning and/or treatment device
CN112336489A (zh) * 2020-11-11 2021-02-09 慈溪赛嘉电子有限公司 电力牙刷装置

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10299580B2 (en) 2013-12-12 2019-05-28 Colgate-Palmolive Company Multi-component bristle having components with different oral care additives, and oral care implement comprising the same
AU2013407533B2 (en) * 2013-12-12 2017-01-12 Colgate-Palmolive Company Multi-component bristle having components with different oral care additives, and oral care implement comprising the same
US11547202B2 (en) * 2014-07-31 2023-01-10 Geka Gmbh Wire-core applicator having multi-material bristles
US10702057B2 (en) 2015-07-07 2020-07-07 Colgate-Palmolive Company Oral care implement and monofilament bristle for use with the same
US20190008271A1 (en) * 2015-12-28 2019-01-10 Colgate-Palmolive Company Brush with Fluid Delivery
US10681976B2 (en) * 2015-12-28 2020-06-16 Colgate-Palmolive Company Brush with fluid delivery
US11229283B2 (en) 2015-12-28 2022-01-25 Colgate-Palmolive Company Brush with fluid delivery
US11930915B2 (en) 2015-12-28 2024-03-19 Colgate-Palmolive Company Brush with fluid delivery
US11618126B2 (en) * 2019-08-30 2023-04-04 Taiwan Semiconductor Manufacturing Company Limited Polishing pad conditioning apparatus
US11812845B2 (en) 2020-06-15 2023-11-14 Church & Dwight Co., Inc. Ionic toothbrush
EP4018881A1 (en) * 2020-12-22 2022-06-29 Koninklijke Philips N.V. Cleaning and/or treatment unit for an oral care device
WO2022135805A1 (en) 2020-12-22 2022-06-30 Koninklijke Philips N.V. Cleaning and/or treatment unit for an oral care device
WO2023038207A1 (ko) * 2021-09-08 2023-03-16 주식회사 프록시헬스케어 전기 칫솔

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CN102791166A (zh) 2012-11-21
EP2517601A1 (en) 2012-10-31
WO2011078127A1 (ja) 2011-06-30
JPWO2011078127A1 (ja) 2013-05-09

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