WO2002011582A1 - Brosse à dents - Google Patents

Brosse à dents Download PDF

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Publication number
WO2002011582A1
WO2002011582A1 PCT/JP2001/006671 JP0106671W WO0211582A1 WO 2002011582 A1 WO2002011582 A1 WO 2002011582A1 JP 0106671 W JP0106671 W JP 0106671W WO 0211582 A1 WO0211582 A1 WO 0211582A1
Authority
WO
WIPO (PCT)
Prior art keywords
resin layer
head
head portion
hard resin
toothbrush
Prior art date
Application number
PCT/JP2001/006671
Other languages
English (en)
Japanese (ja)
Inventor
Yasushi Okuda
Shingo Suzuki
Kazutoshi Endo
Takao Kato
Masuhiro Yogo
Original Assignee
Lion Corporation
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
Priority claimed from JP2000241238A external-priority patent/JP2002051835A/ja
Priority claimed from JP2001014381A external-priority patent/JP4738603B2/ja
Application filed by Lion Corporation filed Critical Lion Corporation
Priority to AU2001276715A priority Critical patent/AU2001276715A1/en
Publication of WO2002011582A1 publication Critical patent/WO2002011582A1/fr

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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
    • A46B9/026—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups where the surface of the brush body or carrier is not in one plane, e.g. not flat
    • 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
    • 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
    • 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 a toothbrush configured so that a part or the whole of a head part can bend toward front and back surfaces of the head part.
  • the entire toothbrush head is made of hard resin, and the brush is usually planted in the hard resin. For this reason, the brush bends at the time of brushing, but the head itself hardly bends, and the brush tip is moved from the back teeth to the front teeth, and the unevenness in the oral cavity, such as the curved part along the dentition on the ⁇ and lingual sides It was difficult to fit well.
  • toothbrushes have been proposed in which the head portion is made movable to increase the fit of the bristle tip to the tooth surface to enhance the effect of removing plaque.
  • a hinge effect Japanese Patent Application Publication No. 5-501212
  • a flexible or elastic connection of two or more segments Japanese Patent Application Publication No. 6-5 0 7 7 9 2
  • Japanese Patent Application Laid-Open No. 9-119332 Japanese Patent Application Laid-Open No. 9-119332
  • a groove formed in the head part Using a thermoplastic elastomer there International Patent Publication No.
  • thermoplastic elastomer disposed on the groove and on the side (Japanese special table) No. 2000-502), a thermoplastic elastomer covering the thin portion of the polypropylene resin having a movable part.
  • a thermoplastic elastomer covering the thin portion of the polypropylene resin having a movable part.
  • the present invention has been made to solve the above problems, and in a toothbrush having a movable head, the cleaning performance and the fitting property, which are important as the performance of the toothbrush, have been improved, and the moldability has also been improved.
  • the purpose is to provide a toothbrush.
  • the present invention provides a tooth brush having excellent flexibility and flocking strength at the head portion by forming the whole or a part of the head portion into a multilayer structure of a hard resin and a soft resin. It is an object. Disclosure of the invention
  • the present invention relates to a toothbrush including a head portion having a bristle bundle implanted on a flocked surface, and a neck portion and a grip portion following the head portion, wherein the head portion extends from a rear end to a front end.
  • the entirety or a part of the head portion is constituted by a head portion in which a soft resin layer is laminated on the hard resin layer, and the head portion is provided on the head portion. It is characterized in that flexibility is provided in the direction of the front and back surfaces of the door portion.
  • the hard resin layer is formed so as to cover the flocking surface of the head portion, and the soft resin layer is formed to have a thickness larger than the hard resin layer.
  • the head portion is disposed on the back side of the hard resin layer, and has a two-layer structure.
  • the thickness of the hard resin layer is 0.1 mm or more, less than 5 mm, preferably 0.4 mm or more, less than 3 mm, more preferably 0.5 mm or more, less than 3 mm, and more preferably 0 mm or less. It is desirable that the thickness be 8 mm or more and less than 3 mm.
  • the area of the head is 5 to 90% of the area of the entire head.
  • the hair bundle may be implanted on the implanted surface by a flat line.
  • ADVANTAGE OF THE INVENTION According to this invention, a flocking intensity
  • the material of the hard resin a material having a flexural modulus (JIS K7203) of 500 to 3,000 MPa, preferably 1400 to 1900 MPa is preferable.
  • the melt flow rate (MFR) of the hard resin is 5 to 70 g / 10 min (test method JISK 7210, test temperature 230 ° test load 2.16 kg / cm 2
  • the soft resin material a material having a flexural modulus of 1 to 15 OMPa and a hardness (JISK 6253 hardness test, test condition JISA) of 5 to 100, preferably 20 to 60 is preferable, and a polyolefin-based thermoplastic elastomer is used.
  • Polystyrene-based thermoplastic elastomer Polyurethane-based thermoplastic elastomer, Polyester-based thermoplastic elastomer, 1,2 Polybutadiene-based thermoplastic elastomer, Ethylene-vinyl acetate-based thermoplastic elastomer, Polyvinyl chloride-based Thermoplastic elastomers, natural rubber-based thermoplastic elastomers, fluorine-based thermoplastic elastomers, trans-polyisoprene-based thermoplastic elastomers, and the like can be used.
  • melt flow rate (MFR) of the soft resin is 0.01 to 70 g / 10 min (test method JISK 72 10, test temperature 230 ° (, test load 2.16 kg / cm 2 ) is preferred.
  • a polypropylene resin (PP) and a polyolefin-based thermoplastic elastomer, or a polypropylene resin and a polystyrene-based thermoplastic elastomer from the viewpoints of physical properties, price, and mutual compatibility of materials.
  • a polyolefin-based thermoplastic elastomer an ethylene-propylene-gen terpolymer (EPDM) is selected as a rubber component, and a polypropylene resin is selected as a hard component. Alternatively, all of them are crosslinked.
  • a thermosetting silicone resin obtained by two-component mixture injection may be used.
  • the material of the brush (filament) that constitutes the hair bundle is polyester such as polyethylene terephthalate and polybutylene terephthalate, nylon 6, nylon 66, nylon 6-10, nylon 6-12, and nylon.
  • Materials that can be melt-spun such as polyamides such as 1 and 2, polyolefins such as polyethylene and polypropylene resins, and polyvinyl halides such as vinylidene polyfluoride can be used, but nylon is used in terms of usability and durability. Is preferred.
  • the cross-sectional shape of the brush is mainly circular, but is not particularly limited.
  • a brush having a cross-sectional shape such as a square or a hexagon can be used.
  • the brush thickness should be 3-14 mils (0.076-0.356 m). Preferably 5-14 mils (0.127-0.356 mm) For adults, more preferably 8 to 11 mils (0.203 to 0.279 mm), for children more preferably 6 to 8 mils (0.15 2 (0.23 mm) brush has good usability and durability.
  • the diameter is the same in one brush except for the rounded part of the bristle tip.However, even in the vicinity of the root of the bristle bundle, even with the above-mentioned brush thickness, the diameter gradually decreases toward the bristle tip. It may be in the form of highly tapered bristles.
  • the shape of the tip of the brush may be a spatula shape, a scraper shape, a spherical shape, or the like.
  • the size of the flocking hole is a perfect circle with a diameter of 1.0 to 3.0 mm, a major axis of 0.5 to 3.0 mm, a minor axis of 0.5 to 3.0 mm, an ellipse of 3.0 mm, and a short side.
  • a rectangle with a side of 1.0 mm to a long side of 1.5 mm and a short side of 0.5 mm can be used independently for 20 to 40 holes, a round hole and an oval hole, or a rectangular hole or a polygonal hole Using a combination Is also good.
  • the flocking hole shape may be a normal cylinder, but it may be tapered so that the hole diameter becomes smaller as it goes down, or it may have a step, or it may have a step and a part of the taper. Can also be used. In addition to these shapes, it is possible to use a 0.3mm chamfered bottom part.
  • the ratio of the total cross-sectional area of the brush to the cross-sectional area of the bristle hole is 50 to 85%, the frictional resistance between the bristle bundle and the handle part is large, and the phenomenon of hair breakage is considered. It is preferable because it does not easily occur and does not generate cracks around the flocking hole due to the impact during flocking.
  • a flat-line type flocking method can be used as a bristle flocking method. Furthermore, after the hair is implanted using a flat wire, heating is performed by applying high frequency to melt the elastomer around the flat wire, so that the hair implantation strength can be further increased.
  • the dimensions of the flat wire for fixing the brush should be 1.0 to 1.6 mm in width, preferably 1.2 to 1.5 mm, and the length should be the diameter of the hole made in the hard resin (diameter 1.0 to (3.0 mm) longer by 0.4 to 0.8 mm, preferably 0.5 to 0.7 mm, and the thickness is 0.1 to 0.4 mm, preferably 0.15 to 0 3 mm is recommended.
  • Aluminum, brass, nickel silver, etc. can be used as the material of the flat wire, but brass is preferred in terms of economy.
  • the shape of the flat wire is generally a rectangle, but the shape is not limited to this, and a wedge shape or a grooved shape having two to four concave surfaces on one side or both sides can be used. When a grooved material is used, the flocking strength can be further increased.
  • the method of implanting the hair bundles is not limited to the above-mentioned flat-line type implanting method, but may be an in-mold method (Japanese Patent Application Laid-Open No. Sho 61-268208, Japanese Patent Application Laid-Open No. Hei 9-151122) No. 724) and the heat fusion method (see Japanese Patent Application Laid-Open No. 60-241404) can be used. improves. Furthermore, if the fused portions are connected, the flocking strength is further improved. In the case of these methods, the manufacturing process is complicated, and the mold is also complicated. Therefore, the flat-line type flocking method is preferable in terms of manufacturing costs. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1A to 1H show a first embodiment of the present invention and are schematic side views of a toothbrush head.
  • FIGS. 2A to 2F show another example of the first embodiment of the present invention, and are schematic side views of a tooth brush head.
  • 3A to 3E are schematic plan views of the toothbrush head according to the first embodiment of the present invention.
  • 4A to 4C are schematic plan views illustrating other examples of the brush head portion according to the first embodiment of the present invention.
  • FIG. 5A is a schematic plan view of a toothbrush head showing a second embodiment of the present invention
  • FIG. 5B is a schematic side view thereof
  • FIG. 5C is a view of the toothbrush head in a bent state. It is a schematic side view.
  • FIG. 6A is a schematic plan view of a toothbrush head showing a third embodiment of the present invention
  • FIG. 6B is a schematic side view thereof
  • FIG. 6C is a view of the toothbrush head in a bent state. It is a schematic side view.
  • FIG. 7A is a schematic plan view of a toothbrush head showing a fourth embodiment of the present invention
  • FIG. 7B is a schematic side view thereof
  • FIG. 7C is a view of the toothbrush head in a bent state. It is a schematic side view.
  • FIG. 8 shows a fifth embodiment of the present invention, and is a schematic side view of a toothbrush head.
  • FIG. 9A is a schematic plan view of a head part showing a sixth embodiment of the toothbrush according to the present invention
  • FIG. 9B is a longitudinal sectional view thereof
  • FIG. 9C is an enlarged sectional view of a flocking hole.
  • FIG. 10A is a schematic plan view of a head part showing a seventh embodiment of the toothbrush according to the present invention
  • FIG. 10B is a longitudinal sectional view thereof. .
  • FIG. 11A is a schematic plan view of a head portion showing an eighth embodiment of a toothbrush according to the present invention
  • FIG. 11B is a longitudinal sectional view thereof.
  • FIG. 12A is a schematic plan view of a head portion showing a ninth embodiment of the toothbrush according to the present invention
  • FIG. 12B is a longitudinal sectional view thereof
  • FIG. 13 shows a tenth embodiment of the toothbrush according to the present invention, and is a schematic plan view of a head portion.
  • FIG. 14 shows a first embodiment of a toothbrush according to the present invention, and is a schematic plan view of a head portion.
  • FIG. 15 is a schematic longitudinal sectional view of a head portion showing a 12th embodiment of the toothbrush according to the present invention.
  • FIG. 16 shows a thirteenth embodiment of the toothbrush according to the present invention, and is a schematic longitudinal sectional view of a head portion.
  • FIG. 17 shows a fourteenth embodiment of the toothbrush according to the present invention, and is a schematic longitudinal sectional view of a head portion.
  • FIG. 18 shows a fifteenth embodiment of the toothbrush according to the present invention, and is a schematic longitudinal sectional view of a head portion.
  • FIG. 19 shows a sixteenth embodiment of the toothbrush according to the present invention, and is a schematic longitudinal sectional view of a head portion.
  • FIGS. 20A to 20C are diagrams showing another example of the shape of the flocking hole.
  • FIG. 21A is a schematic plan view of a head portion showing a shape example of a conventional toothbrush
  • FIG. 21B is a longitudinal sectional view thereof.
  • FIGS. 1A to 1H and FIGS. 2A to 2F show a first embodiment of the present invention.
  • the toothbrush according to the first embodiment is a toothbrush including a head portion, a neck portion, and a grip portion, in which a part or the whole of the toothbrush head portion has a two-layer or multilayer structure of a hard resin and a soft resin.
  • the toothbrush head has flexibility.
  • the toothbrush of Fig. 1A has a two-layer structure of a concave-curved head part 1 on which a brush bundle 2 is planted, and a thin hard resin layer 4 integrally molded with a neck part 3 on the upper side.
  • the lower layer side is a thin soft resin layer 5.
  • the soft resin layer 4 is hatched. (The same applies hereinafter).
  • the entire concave curved head portion 1 has a two-layer structure.
  • the upper layer side is a thin soft resin layer 5 and the lower layer side is a neck portion 3. It is a thin hard resin layer 4 that is integrally molded.
  • the lower surface of the distal end side of the head portion 1 bent at the distal end side toward the flocking surface side is the soft resin layer 5, and the remaining portion is the hard resin layer 4. It is a thing.
  • the upper end of the head 1 which is bent so that the front end faces the head implanted surface side, is a soft resin layer 5, and the remaining part is a hard resin layer 4. Things.
  • the lower surface portion on the distal end side of the concave portion-shaped head portion 1 is a soft resin layer 5, and the remaining portion is a hard resin layer 4.
  • the lower surface of the base end side (the neck 3 side) of the concave portion-shaped head portion 1 is a soft resin layer 5 and the remaining portion is a hard resin layer 4.
  • a soft resin layer 5 is formed near the center of the lower surface side of the head portion 1 having a concave curved surface shape, and the remaining portion is a hard resin layer 4.
  • a soft resin layer 5 is formed at two locations on the front and rear sides of a concave curved head portion 1 on the lower surface side, and the remaining portion is a hard resin layer 4.
  • the toothbrush of Fig. 2A has a three-layer structure of the entire concave curved head part 1, so that the middle layer is a thin hard resin layer 4 integrally formed with the neck part 3 and the upper layer side.
  • the lower layer is a thin soft resin layer 5 and the entire surface of the hard resin layer 4 is sandwiched between the soft resin layers 5 and 5 from above and below.
  • the tip half of the concave curved head portion 1 has a three-layer structure, and the upper and lower layers of the three-layer structure portion are formed as the soft resin layer 5.
  • the middle layer portion is a hard resin layer 4 integrally formed with the neck portion 3, and the front half of the hard resin layer 4 is sandwiched between soft resin layers 5 and 5 from above and below.
  • the base half of the concave curved head 1 has a three-layer structure at the base end, so that the upper and lower layers are made of the soft resin layer 5, and the middle layer is made of the neck.
  • the hard resin layer 4 is formed integrally with the hard resin layer 4 and the base half of the hard resin layer 4 is formed of a soft resin layer 5,5. Are sandwiched from above and below in a sandwich shape.
  • the central part of the concave curved head part 1 has a three-layer structure near the center, so that the upper and lower layers are made of the soft resin layer 5, and the middle part is made of the neck part 3.
  • the hard resin layer 4 is integrally molded, and the hard resin layer 4 near the center is sandwiched between the soft resin layers 5 and 5 from above and below.
  • the whole of the concave curved head part 1 has a three-layer structure.
  • the upper and lower layers are made of a thin hard resin layer 4, and the middle layer is made of a thin soft material.
  • the resin layer 5 is sandwiched between the soft resin layer 5 and the hard resin layers 4 from above and below.
  • a soft resin layer 5 is formed in the vicinity of the central portion of the head portion 1 having a concave curved surface, and the remaining portion is a hard resin layer 4.
  • 3A to 3E and 4A to 4C show examples of the planar shape of the head part in the toothbrush according to the first embodiment.
  • FIGS. 3A and 3B show examples in which the soft resin layer 5 is located at the tip end side of the head (corresponding to the toothbrush in FIGS. 1D and 2B), and FIGS. 3C to 3E show the case where the soft resin layer 5 is the head.
  • Fig. 4A shows an example of the case where the entire surface of the flocked part is covered (corresponding to the toothbrush of Fig. 1B and Fig. 2A), and Fig. 4A shows an example of the case where the soft resin layer 5 is on the base end side of the head part.
  • FIG. 4B shows an example in which the soft resin layer 5 is located near the center of the head (corresponding to the toothbrush in FIG. 2D)
  • FIG. 4C shows a case in which the soft resin layer 5 has a hard portion. This is an example in the case where it is located at two places before and after the flocking surface.
  • the laminated portion of the hard resin layer 4 and the soft resin layer 5 of the head portion 1 has flexibility, and the laminated portion has a flexibility according to the force applied during brushing. To bend elastically. As a result, the bristle ends are well fitted to the tooth surface and the unevenness in the oral cavity, and the brushing effect is improved. In addition, the force is not concentrated on a specific portion of the head portion 1, and the durability is excellent. Furthermore, when the soft resin layer 5 is the outermost layer, the feeling of contact with the teeth and gums in the oral cavity becomes softer, and the feeling of actual brushing becomes more excellent.
  • the material of the hard resin layer 4 is preferably a thermoplastic resin having a flexural modulus of 500 to 300 MPa (JISK7203).
  • Polypropylene polyethylene, etc.
  • polyester polyethylene terephthalate, polybutylene terephthalate, etc.
  • polycarbonate including blends with polyester
  • polyarylate including blends with polyester
  • polyoxymethylene AS resin, ABS resin, cellulose propionate, polyamide, PMMA resin and the like can be used.
  • the flexural modulus is 1 to 150 MPa
  • the hardness JISK6253 hardness test, test condition JISA
  • L00 preferably 20 to 6.
  • polyolefin-based thermoplastic elastomer polystyrene-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, 1,2-polybutadiene-based thermoplastic elastomer, ethylene-acetic acid
  • Vinyl-based thermoplastic elastomer polyvinyl chloride-based thermoplastic elastomer, natural rubber-based thermoplastic elastomer, fluorine-based thermoplastic elastomer, trans-polyisoprene-based thermoplastic elastomer, etc.
  • polypropylene and a polyolefin-based thermoplastic elastomer or polystyrene-based thermoplastic are used. It is preferable to use a hydrophilic elastomer.
  • a polyolefin-based thermoplastic elastomer ethylene-propylene-gen terpolymer (EPDM) is selected as a rubber component, and polypropylene is selected as a hard component. A crosslinked product is used.
  • a thermosetting silicone resin obtained by two-part mixture injection may be used.
  • the head length is 10 to 30 mm, preferably 15 to 28 mm, and the head width is 5 to 20 mm, preferably? If it is set to ⁇ 15 mm, it is a compact head with high operability in the oral cavity and high usability. Further, it is desirable that the skeleton member of the head portion is formed integrally with the neck portion by using a hard resin as a primary material, and is set to a thickness that can be continuously and elastically bent over a plurality of hair bundle regions.
  • the flexible part and the flocking part are the body.
  • the same degree of freedom of hair bundle arrangement as that of a normal toothbrush can be obtained, and the utilization efficiency of the flocked surface of the sword part is improved.
  • the flexible region In order for the flexible region to extend over a plurality of bristle bundle regions, the flexible region should have a width of more than 1.0 mm, more preferably 3.0 mm or more.
  • the thickness of the hard resin is 0.1 mm or more and less than 5.0 mm, and preferably ⁇ 0.1 to 3.0 mm. With such a thickness, the head portion and the neck portion may be joined to each other so as to be thinner than the neck portion, or may be joined to the neck portion so as to have a series of thicknesses.
  • the flexible portion extending over the plurality of hair bundle regions may be formed over the entire head portion, or may be a front end portion, only a rear end portion, or a partial portion such as a central portion.
  • at least 5%, preferably at least 10%, of the plane area of the head portion should be formed as a flexible portion.
  • the displacement of the flexible portion is at least 0,1 ° or more in the positional relationship between the head-neck joint and the head tip when a brushing force of 1 N or more is applied to the head. Or 0.1 mm or more). Preferably, it is 0.5 ° or more (or 0.5 mm or more), more preferably 1. When the displacement is set to the above (or 1.0 mm or more), a clearer feeling of flexibility can be obtained, and this is preferable from the viewpoint of fit.
  • the thickness of the hard resin in the flexible portion may be configured to be thinner than the neck portion, and a uniform thickness portion may be provided, or the thickness may be non-uniform. In order not to concentrate the force, including the joint with the neck, it is preferable that the thickness is configured to change gradually in a curved or linear manner. In addition to flexing the entire head, if only the front end is flexible, the rear end remains the same as the conventional head thickness, and is set to a thickness that flexes flexibly from the middle of the head. Is preferred. In addition, the thickness takes a minimum value near the middle of the head while gradually changing the thickness. You may make it.
  • the tip portion can be made flexible while maintaining the rigidity of the rear end portion to some extent.
  • a plurality of flexible portions may be provided in the head.
  • the soft resin layer 5 is the outermost layer, the contact with the teeth and gums in the oral cavity becomes gentler, and if the periphery of the head is covered with the soft resin layer, the oral comfort becomes softer. And preferred.
  • the soft resin layer 5 may be formed separately and independently at each portion, and may be formed by providing a plurality of injection gates. However, the flocked surface of the head and the head are connected so as to connect these portions. If a flow path is provided through the hole, the injection gate can be filled in a single injection molding operation with one injection gate, which is extremely efficient. Further, the soft resin portions of the neck portion and the grip portion may be connected to each other.
  • the flexible region formed partially in the head portion, or the planar shape of the soft resin layer laminated thereover, can be more flexible if it is formed so as to cross the head portion. it can.
  • the shape is not limited.
  • the boundary with the non-flexible region does not necessarily have to be a straight line substantially perpendicular to the long axis of the head portion, and the shape of the flexible region is, for example, polygonal, circular, convex lens shape, concave lens shape, curved band shape (U Shape, c-shape, wavy shape, etc.
  • it may be arranged in the non-flexible region and / or arranged so as to at least partially surround the non-flexible region.
  • the flocking surface of the head portion 1 may be a flat surface, or a substantially concave curved surface having a radius of curvature of 300 mm or less, preferably 200 mm or less, or 45 ° or less, preferably from the neck side to the tip side. It is preferable to have one or a plurality of bent portions of 30 ° or less.
  • a concave surface is formed or a bent portion is formed in this way, the brush tip at the head end side should be surely placed on a hard-to-reach area such as the back of the teeth or the back of the back teeth. It can improve the plaque removal effect and the fit of the arriving and brush.
  • the shape of the toothbrush handle as a whole may be, for example, a straight type handle by arranging the head part, neck part, and grip part coaxially, or may be a handle shape such that the whole becomes a gentle S-shape.
  • the neck may be curved at an angle to the flocked surface side or the opposite side, or the head may be offset from the gripping portion. .
  • the brush to be planted there is no particular limitation on the brush to be planted, but these may be appropriately selected according to the specifications of the toothbrush.
  • these may be appropriately selected according to the specifications of the toothbrush.
  • 3-14 mil (0.076-0.36 mm) preferably 6-11 mil (0.152-0.279 mm) brush, highly tapered hair, and spherical tip , Spatula-shaped or cracked ones may be used in combination as necessary.
  • the cross-sectional shape of the brush bundle 2 is also, for example, ⁇ 1mn!
  • Various cross-sectional shapes such as circular, oval, square, and triangular with a diameter of about ⁇ 5 mm can be used.
  • the hair cutting shape and brush length (for example,? To 13 mm), it is possible to make it a single plane shape, a mountain cutting shape, an uneven shape, etc.
  • the front and rear ends may have different configurations.
  • the brush material is usually nylon (nylon 6-12, nylon 6-10, etc.) ⁇ polybutylene terephthalate (PBT), but may be combined with natural hair if necessary.
  • nylon nylon 6-12, nylon 6-10, etc.
  • PBT polybutylene terephthalate
  • the number of brushes in one bundle is determined appropriately between the filling rate of 50 to 85% depending on the brush diameter and the cross section of the bristle, but it does not take the form of a bristle bundle, and each brush is independent. Or, for example, a form in which a very small number of about 2 to 10 pieces may be integrated.
  • a flat wire flocking method is used to fix it using a metal piece (flat wire), and the brush bundle melting part is melted and pressed into the toothbrush head and fixed.
  • Conventionally known methods such as a heat fusion method, a brush or a bundle of brushes are heated to form a molten mass after the lower end of the brush bundle is heated, and the molten resin is injected into a mold to manufacture a toothbrush. can do.
  • 5A to 5C show a second embodiment of the present invention.
  • the front end side of the head portion is It is configured to be able to bend within a range of 85 ° (see Fig. 5C), and the plane area of the flexible part is 5 to 90% of the plane area of the entire head part. It is set.
  • the first half of the head portion 1 on which the brush bundle 2 is planted has a two-layer structure
  • the upper layer side is a thin hard resin layer 4 integrally formed with the neck portion 3
  • the lower layer side is Is a thin soft resin layer 5, and the axis connecting the center axis X—X in the longitudinal direction of the normal head section 1 to the center section P at the front end of the head section and the center section P 2 at the rear end of the head section.
  • the hardness of the soft resin layer 5 is set so that the angle between the lines (hereinafter, referred to as the flexible angle) is, so that the front end of the head can be bent in the range of 0.1 ° to 85 °.
  • the area of the flexible portion is set to be 5 to 90% of the entire area of the head portion.
  • the recommended brushing force during brushing for a toothbrush is 2-3 N or 2-4 N.
  • the flexible angle ⁇ of the head portion is 0.1 °.
  • the angle is set to be in the range of ⁇ 85 °, the fitting property of the brush bundle 2 to the tooth surface is increased, and the brushing effect is improved.
  • the flexible angle is 0.1 ° to 75 °, the brushing force is more reliably transmitted to the tooth surface, which is more preferable.
  • the area of the flexible portion is 5 to 90% of the entire area of the head portion 1, the fitting of the hair tip to the tooth surface and the unevenness in the oral cavity becomes good, while the bending Higher plaque removal power is obtained at the fixed part, and the balance between them further improves the brushing effect.
  • the area ratio is more preferably 15 to 80%, and further preferably 20 to 70%.
  • the soft resin portion is not limited to the connection portion, and may have an area spread on the flocked surface or the back side. In this case, the contact area between the soft resin portion and the hard resin portion increases, and the manner in which the force is applied by brushing is dispersed, thereby improving the peel strength.
  • the soft resin when configured to shrink to about 50% of the state without stress or to stretch to about 250%, the peel strength can be further improved.
  • the soft resin shrinks up to 80% and stretches up to 240%. Then, the brushing force is more reliably transmitted to the tooth surface, which is more preferable.
  • the hard resin and the soft resin may be the same as those in the first embodiment. The same applies to the material, thickness and shape of the brush. Further, as a method for implanting the brush bundle, a conventionally well-known method such as the above-described flat wire implantation method, heat fusion method, and in-mold method can be used.
  • 6A to 6C show a third embodiment of the present invention.
  • the toothbrush according to the third embodiment has a two-layer structure in the first half of the head portion 1 on which the brush bundle 2 is planted, and a thin hard resin layer 4 integrally molded with the neck portion 3 on the lower side.
  • the upper layer side is a thin soft resin layer 5, and the hardness of the soft resin layer 5 is set so that the tip end side of the head can be bent in a range of 20.1 ° to 85 °.
  • the hard resin and the soft resin may be the same as those in the first embodiment. The same applies to the material, thickness and shape of the brush. Further, as a method for implanting the brush bundle, a conventionally well-known method such as the above-described flat wire implantation method, heat fusion method, and in-mold method can be used.
  • FIG. 7A to 7C show a fourth embodiment of the present invention.
  • the toothbrush according to the fourth embodiment has a three-layer structure in the first half of the head portion 1 on which the brush bundle 2 is planted, and a thin hard resin layer 4 integrally formed with the middle portion with the neck portion 3.
  • the hard resin and the soft resin may be the same as those in the first embodiment. Also, the material, thickness and shape of the brush are the same. It is like. Further, as a method for implanting the brush bundle, a conventionally well-known method such as the above-described flat wire implantation method, heat fusion method, and in-mold method can be used.
  • FIG. 8 shows a fifth embodiment.
  • the MFR of the hard resin and the soft resin is set to an optimum value for injection molding.
  • the toothbrush according to the fifth embodiment has a two-layer structure in which about two-thirds of the tip side of the head portion 1 on which the brush bundle (not shown) is planted.
  • the upper layer side is integrated with the neck part 3 and the concave-curved hard resin layer 4 which gradually becomes thinner toward the head end side, and the lower layer side is thin soft resin.
  • the MFR of the hard resin forming the hard resin layer 4 is 5 to 70 g / 10 min
  • the MFR of the soft resin forming the soft resin layer 5 is 0.01 to 70 g / 10 min (both at test method JISK 72 10, test temperature 230 ° C, test load 2.16 kg / cm 2 ).
  • the illustration of the brush bundle implanted in the head 1 is omitted.
  • the hard resin preferably has an MFR of 7 to 65 g / 10 min, more preferably 9 to 60 g / 10 min. This effect is particularly remarkable in a toothbrush having a thin portion having a thickness of 1 mm or less.
  • the MFR of the soft resin is more preferably from 0.05 to 65 g / l 0 min, and still more preferably from 0.08 to 60 g / l 0 min.
  • the materials of the hard resin and the soft resin are as described in the first embodiment. The same as described above can be used. The same applies to the material, thickness and shape of the brush. Further, as a method for implanting the brush bundle, a conventionally well-known method such as the above-described flat wire implantation method, heat fusion method, and in-mold method can be used.
  • a soft resin is laminated on a part or the whole of a head portion made of a hard resin, and the head portion on which the soft resin is laminated is connected to the head portion.
  • the flexible angle at the tip of the head portion, the ratio of the area of the flexible portion to the area of the entire head portion, the hardness of the soft resin, and the soft resin And the MFR of the hard resin are set to the optimum values, so that the toothbrush with movable head has improved the cleaning performance and fit, which are important as the performance of the toothbrush, and the toothbrush with improved moldability.
  • 9A to 9C show a sixth embodiment of the toothbrush according to the present invention.
  • 1 is a head portion
  • 8 is a flocked hole formed on a flocked surface of the head portion
  • 3 is a neck portion
  • a bristle bundle obtained by bundling a plurality of brushes is implanted by a flat wire type flocking method.
  • a thin hard resin layer 4 made of polypropylene resin (PP) having a bending elastic modulus of 160 MPa is formed on the flocking surface side of the head portion 1 so as to cover the entire flocking surface.
  • a soft resin layer 5 made of a polyolefin thermoplastic elastomer is superimposed, and the entire head portion 1 is formed by the hard resin layer 4 and the soft resin layer 5. It has a two-layer structure.
  • the hard resin layer 4 is formed integrally with the neck 3 via the inclined surface 6, and the neck 3 is further connected to a grip (not shown).
  • each part is as follows: the length from the leading edge of the head part 1 to the rear end (near the neck part): 22.5 mm from the flocking hole 8; head width: 10.0 mm
  • the thickness of the head 1 at the front end is 4.50 mm
  • the thickness of the hard resin layer 4 at the front end of the head is 0.5 mm
  • the rear end (close to the neck 3) is 0.80 mm
  • the thickness of the neck 3 is
  • the thickness is 5.00 mm
  • the hard resin layer 4 and the soft resin layer 5 are injection molded by a two-color molding method.
  • the number of holes in the flocking holes 8 is 28, the hole diameter is ⁇ 1.70 mm, and the hole depth is 3.80 mm.
  • a brush (filament) of 8 mil (0.203 mm) diameter is provided in each flocking hole 8.
  • the hairs were implanted by flat wire method (22 pieces per hole) using the flat wire method (flat wire material: brass, flat wire thickness 0.25 mm, width 1.5 mm, length 2.2 mm).
  • the entire head portion 1 has a two-layer structure of a thin hard resin layer 4 and a thick soft resin layer 5, so that the entire head portion can be oriented in the front and back direction of the head portion. It has flexibility. As a result, the head portion 1 can bend smoothly in the direction of the front and back surfaces of the head portion, and the fit to the tooth surface is improved, and the contact with the teeth and gums is improved. The tip of the hair becomes easy to enter and the plaque removal effect between teeth and cervix is improved.
  • the flocking hole 8 has a hole depth reaching the inside of the soft resin layer 5, sufficient flocking strength can be secured. According to actual measurements, a flocking strength of 17N was obtained.
  • FIGS. 1OA and 10B show a seventh embodiment of a toothbrush according to the present invention.
  • the seventh embodiment has substantially the same shape as that of the sixth embodiment, and is different from the sixth embodiment in that the hard resin layer 4 is connected to the neck portion via the vertical surface 7. The only difference is that they are connected to 3 and the dimensions of each part are slightly different. Note that the same or equivalent parts as those of the sixth embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • Head width 10.00mm, head part 1 tip side thickness 3.00mm, hard resin layer 4 head part tip side thickness 0.50mm, rear end side (close to neck 3) thickness 0.80mm, neck 3 thickness 4.00 mm, flocking hole 8 hole diameter 01.70 mm, head tip side hole depth 2.24 mm, rear end side (close to neck 3) hole depth 2.75 mm is there.
  • FIG. 11A and 11B show an eighth embodiment of the toothbrush according to the present invention.
  • the head portion 1 has a straight shape, and the thickness of the hard resin layer 4 is increased stepwise toward the neck portion 3 side.
  • the same or equivalent parts as those in the above-described embodiments are denoted by the same reference numerals. Detailed description is omitted.
  • the length from the leading edge of the head part 1 to the rear end side (near the neck part) is 22.53 mm from the flocking hole 8
  • the head width is 10.00 mm
  • the head is The thickness of the first side of part 1 4.50 mm, the thickness of the first layer on the head side of the hard resin layer 4 0.80 mm, the thickness of the second layer 1.10 mm, the thickness of the third layer 1. 40 mm, thickness of the 4th stage 1.70 mm, thickness of neck 3 5.00 mm, hole diameter of flocking hole 8 ⁇ 1.70 mm.
  • the hard resin layer 4 is formed in a shape similar to that of the eighth embodiment so that the thickness of the hard resin layer 4 is continuously tapered toward the neck 3 side. is there.
  • the same reference numerals are given to the same or equivalent parts as in the above-described embodiments, and the detailed description thereof will be omitted.
  • the length from the leading edge of the head part 1 to the rear end side (near the neck part) is 22.53 mm from the flocking hole 8, the head width is 10.00 mm, and the head is Head part thickness of part 1 4.50mm, head part thickness of hard resin layer 4 0.80mm, middle position thickness 1.10mm, rear end side (near neck 3) thickness 1.70mm, neck 3 thickness It is 5.00 mm and the diameter of the flocking hole 8 is ⁇ 1.70 mm.
  • FIG. 13 shows a tenth embodiment of the toothbrush according to the present invention.
  • the shape of the flocked holes is changed depending on the location, and the three rows of flocked holes 8a at the tip end side of the head part are circular holes having a diameter of ⁇ 1.70 mm.
  • the five rows of flocked holes 8b at the rear end (near the neck) are elliptical holes with a major axis of 1.70 mm and a minor axis of 1.00 mm. Note that the same or equivalent parts as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • FIG. 14 shows a first embodiment of a toothbrush according to the present invention.
  • FIG. 15 shows a twelfth embodiment of the toothbrush according to the present invention.
  • the head portion 1 has a straight shape, and the thickness of the hard resin layer 4 is the thinnest at an intermediate position near the tip of the head portion.
  • the same reference numerals are given to the same or equivalent parts as those in the above-described embodiments, and the detailed description thereof will be omitted.
  • each part is as follows: the thickness of the tip of the head part 1 on the tip side 4.50 mm, the thickness of the hard resin layer 4 on the tip side of the head part on the first side 0.80 mm, the thickness of the second step 0.50 mm, thickness of the third stage 1.40 mm, thickness of the fourth stage 1.70 mm, thickness of neck 3 5.00 mm.
  • FIG. 16 shows a thirteenth embodiment of the toothbrush according to the present invention.
  • the head portion 1 has a straight shape, and the thickness of the hard resin layer 4 is the thinnest near the center of the head portion. It is.
  • the same or equivalent parts as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • each part is as follows: head part 1 tip side thickness 4.50 mm, hard resin layer 4 head part tip side first stage thickness 0.80 mm, second stage thickness 0.50 mm, the thickness of the third stage is 1.40 mm, the thickness of the fourth stage is 1.70 mm, and the thickness of the neck 3 is 5.00 mm.
  • FIG. 17 shows a fourteenth embodiment of the toothbrush according to the present invention.
  • the head portion 1 has a straight shape, and the thickness of the hard resin layer 4 is reduced to the rear end side (neck portion). 3) is the thinnest. Note that the same or equivalent parts as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • each part is as follows: the thickness of the front end of the head 1 is 4.50 mm, the thickness of the hard resin layer 4 at the front end of the head is 0.80 mm, and the thickness of the rear end (close to the neck 3) is 0.
  • the thickness of the neck 3 is 5.00 mm.
  • FIG. 18 shows a fifteenth embodiment of the toothbrush according to the present invention.
  • the front end half of the head portion 1 is formed of a thin hard resin layer 4. Note that the same or equivalent parts as those in the above-described embodiments are the same. The same reference numerals are given and the detailed description is omitted.
  • the thickness of the head part 1 on the tip side is 4.50 mm
  • the tip of the hard resin layer 4 is side thickness 0. 50 mm
  • the head portion near the center of the thickness 0. 65 mm a hole depth 3. 80 mm of the neck 3 of a thickness 5.
  • FIG. 19 shows a sixteenth embodiment of the toothbrush according to the present invention.
  • the 16th embodiment shows an example in which the toothbrush of the present invention is manufactured by an in-mold method, and the lumped portion 9 formed at the base end of the hair bundle 2 is made of soft resin. Embedded in layer 5. Note that the same or equivalent parts as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • the shape of the flocking hole is a simple cylindrical hole.
  • the shape is not limited to this, and for example, as shown in FIGS. Also used are ones with steps (Fig. 20A), ones with a taper so that the hole diameter becomes smaller toward the bottom (Fig. 20B), and ones with a step and taper (Fig. 20C). it can.
  • a material 190 OMP a
  • the maximum tensile force that can be pulled by a tensile tester is measured.
  • the flocking strength is specified as 8 N or more.
  • the head is slightly movable during brushing.
  • ⁇ The movement of the head is felt during brushing.
  • the thickness of the hard resin layer is 0.4 mm or more, the function as a tooth brush does not interfere. If the thickness is less than 0.4 mm, the bristle bundle may easily come off during brushing, which is not preferable. If the thickness of the hard resin layer in the head portion exceeds 3 mm, the flexibility is lost even in a two-layer structure with the soft resin layer, and the fitting property to the tooth surface is insufficient.
  • the flocking strength value specified in JIS is 8 N or more, as shown in Table 1, if the thickness of the hard resin layer is 0.4 mm, even if flocking is performed by the flat wire flocking method, It was confirmed that the hair transplanting strength was sufficient and there was no problem at all.
  • the whole or a part of the head portion is formed of a thin hard resin layer covering the planted surface, and a predetermined thickness located on the back side of the hard resin layer.
  • the fit between the teeth and the gingiva is improved, and the teeth and gums are more comfortable and comfortable to use.
  • the removal effect is improved.
  • the load is not concentrated on a specific portion, the durability of the brush portion is improved, the bristle implantation strength is improved, and the brush does not come off during use.
  • the hairs are buried and implanted to a depth that reaches the lower soft resin layer, the hair implantation strength can be sufficiently secured, and the brush does not come off during brushing.
  • the toothbrush of the present invention (product of the present invention) having the shape and dimensions shown in FIGS. 9A to 9C, and the conventional toothbrush (conventional product) of only hard resin as shown in FIGS. 21A and 21B )
  • the conventional toothbrush (conventional product) of only hard resin as shown in FIGS. 21A and 21B )
  • Table 2 As is clear from this table, it was confirmed that the product of the present invention was superior to the conventional product in any of the evaluations.
  • the test conditions and evaluation criteria in Table 2 are as follows.
  • Toothbrush usage period 1 week
  • Soft resin Polyolefin-based thermoplastic elastomer
  • Hard resin polypropylene resin ( ⁇ ⁇ )
  • Both the product of the present invention and the conventional product have a flocked hole diameter of 0. 170 mm, the number of flocked holes is 28, the brush thickness is 8 mil (0.203 mm), the number of brushed holes is 22/2 It was a hole.
  • the present invention is a.

Landscapes

  • Brushes (AREA)

Abstract

L'invention concerne une brosse à dents qui comporte une partie tête (1) dans laquelle sont implantés des groupes de poils (2), une partie col (3) et une partie de préhension. La brosse se caractérise en ce que la partie tête (1) comporte une couche de résine dure (4) sur toute la surface ainsi qu'une couche de résine molle (5) stratifiée sur la couche de résine molle, sur une partie ou la totalité de la partie tête (1), avec la possibilité d'observer et d'inverser les deux côtés. La partie tête de la brosse à dents est très flexible et présente ainsi de meilleures caractéristiques de nettoyage et d'efficacité, associées à une bonne formabilité dans la production de la partie poignée.
PCT/JP2001/006671 2000-08-09 2001-08-02 Brosse à dents WO2002011582A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001276715A AU2001276715A1 (en) 2000-08-09 2001-08-02 Tooth brush

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2000-241238 2000-08-09
JP2000241238A JP2002051835A (ja) 2000-08-09 2000-08-09 歯ブラシ
JP2000337703 2000-11-06
JP2000-337703 2000-11-06
JP2001-14381 2001-01-23
JP2001014381A JP4738603B2 (ja) 2000-11-06 2001-01-23 歯ブラシ

Publications (1)

Publication Number Publication Date
WO2002011582A1 true WO2002011582A1 (fr) 2002-02-14

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ID=27344303

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Application Number Title Priority Date Filing Date
PCT/JP2001/006671 WO2002011582A1 (fr) 2000-08-09 2001-08-02 Brosse à dents

Country Status (2)

Country Link
AU (1) AU2001276715A1 (fr)
WO (1) WO2002011582A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008017703A1 (fr) * 2006-08-11 2008-02-14 Glaxosmithkline Consumer Healthcare Gmbh & Co. Kg Brosse a dents

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02143035U (fr) * 1989-05-10 1990-12-04
JPH11127956A (ja) * 1997-10-29 1999-05-18 Kao Corp 歯ブラシ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02143035U (fr) * 1989-05-10 1990-12-04
JPH11127956A (ja) * 1997-10-29 1999-05-18 Kao Corp 歯ブラシ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008017703A1 (fr) * 2006-08-11 2008-02-14 Glaxosmithkline Consumer Healthcare Gmbh & Co. Kg Brosse a dents
US8539632B2 (en) 2006-08-11 2013-09-24 Glaxosmithkline Consumer Healthcare Gmbh & Co Kg Toothbrush

Also Published As

Publication number Publication date
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