WO2012115035A1 - 歯ブラシ - Google Patents
歯ブラシ Download PDFInfo
- Publication number
- WO2012115035A1 WO2012115035A1 PCT/JP2012/053957 JP2012053957W WO2012115035A1 WO 2012115035 A1 WO2012115035 A1 WO 2012115035A1 JP 2012053957 W JP2012053957 W JP 2012053957W WO 2012115035 A1 WO2012115035 A1 WO 2012115035A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hair
- hair bundle
- toothbrush
- bundle
- length
- Prior art date
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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
- A46B9/028—Bristle profile, the end of the bristle defining a surface other than a single plane or deviating from a simple geometric form, e.g. cylinder, sphere or cone
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- 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
- 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.
- This application claims priority based on Japanese Patent Application No. 2011-040060 filed in Japan on February 25, 2011, the contents of which are incorporated herein by reference.
- the sites where caries tend to occur are the back teeth, interdental region, and cervical region.
- the back teeth, interdental region, and cervical region For cleaning the back teeth, it is important to apply a high pressure to the occlusal surface and the tooth surface. Therefore, a hair bundle having high rigidity and high density is suitable.
- the hair bundle can be inserted into narrow spaces such as the interdental or periodontal pockets, and that the contact comfort is soft. Is suitable.
- the back teeth, interdental part, and tooth neck part have different specifications of toothbrushes suitable for cleaning, in order to properly clean these parts, it is necessary to use toothbrushes equipped with appropriate hair bundles. It was necessary.
- toothbrushes that combine hairs and hair bundles with different diameters or hair bundles with different hair lengths have been used.
- Such a toothbrush is composed of long and soft bristles for entering the interdental or cervical region, and a short and hard bristles for cleaning the occlusal surface and tooth surface of the back teeth. Generally composed.
- Patent Document 1 a hair bundle made of a brush that is not sharply tapered is planted on the front end side and / or the rear end side of the toothbrush head portion, and a hair bundle made of a sharply tapered brush is placed in the other part.
- a planted toothbrush has been proposed.
- Patent Document 2 a large-diameter hair bundle arranged in a substantially U shape along the periphery of the flocked surface near the front end of the head portion, and arranged near the rear end of the head portion.
- Patent Document 3 proposes a toothbrush composed of a long bristle having a certain length or more and a short bristle having a certain length or less, wherein the diameter of at least the tip side of the long bristle is smaller than the diameter of the short bristle.
- Patent Document 4 proposes a toothbrush in which a short brush is provided at the center of the brush implantation surface, and a long brush is provided around the short brush so that the entire brush is concave.
- Patent Documents 1 to 4 have not yet been satisfactory in cleaning the interocular portion, the neck portion, and the occlusal surfaces and tooth surfaces of the back teeth. Then, this invention aims at the toothbrush which can clean favorably the interdental part, a tooth neck part, and the occlusal surface and tooth surface of a back tooth.
- a toothbrush in which two or more bristle bundles obtained by bundling two or more hairs on the flocked surface of the head portion are planted, a first bristle bundle group in which one or more first bristle bundles are planted, A second hair bundle group, wherein the second hair bundle comprises a second hair bundle group that is planted so as to open the distal end direction or the proximal end direction of the head portion and surround the first hair bundle group.
- the length of the toothbrush is shorter than the length of the second hair bundle, and the buckling strength of the first hair bundle is lower than the buckling strength of the second hair bundle.
- the first hair bundle includes a hair whose diameter gradually decreases from a position of 0 mm or more and 5 mm or less from the flocked surface toward the tip of the hair, and the hair tip of the hair is sharpened.
- a featured toothbrush The toothbrush characterized in that the second bristle bundle group is formed only near the tip of the head portion. A third hair bundle longer than the length of the second hair bundle is implanted outside the second hair bundle group, and the third hair bundle is located at a position of 0 mm or more and 5 mm or less starting from the flocked surface.
- a toothbrush characterized by comprising a bristle whose diameter gradually decreases toward the tip of the bristle, and the bristle tip of the bristle is sharpened.
- bristle bundle consisting of the hair for which the hair end is not sharpened.
- bristle bundle being what the front-end
- the hair length difference between the length of the second hair bundle and the length of the first hair bundle is 0.3 mm or more and 3 mm or less.
- the buckling strength ratio represented by [(buckling strength of the first hair bundle) / (buckling strength of the second hair bundle)] is 0.4 to 0.9. Toothbrush.
- the buckling strength ratio represented by [(buckling strength of the hair bundle of the third hair bundle) / (buckling strength of the second hair bundle)] is 0.4 to 0.9.
- the first bristle bundle has the bristles whose diameter gradually decreases toward the tip of the bristles and the bristles are sharpened. It can be cleaned better.
- the occlusal surface and tooth surface of a back tooth can be cleaned more favorably.
- the third hair bundle longer than the length of the second hair bundle is implanted outside the second hair bundle group, Since the diameter is gradually reduced toward the tip and the hair is sharpened, the interdental portion and the neck portion can be cleaned better.
- the second bristle bundle has a bristles whose tips are not sharpened, i.e., the diameter of the bristles is the same from the flocked surface to the tips of the flocks, so that the occlusal surface of the back teeth And the tooth surface can be cleaned better.
- the diameter from the flocked surface to the tip of the hair is the same, that the diameter of the horizontal cross section of each hair of the second hair bundle is any horizontal from the flocked surface to the tip of the hair. It means that the cross section is substantially the same. “Substantially the same” means that a variation within ⁇ 10% is allowed for reasons such as machining accuracy.
- toothbrush concerning a first embodiment of the present invention It is a side view of the toothbrush concerning a first embodiment of the present invention. It is a top view of a toothbrush concerning a second embodiment of the present invention. It is a side view of the toothbrush concerning 2nd embodiment of this invention. It is a top view of a toothbrush concerning a third embodiment of the present invention. It is a side view of the toothbrush concerning 3rd embodiment of this invention. It is a top view of the toothbrush concerning a 4th embodiment of the present invention. It is a side view of the toothbrush concerning a 4th embodiment of the present invention. It is a top view of the toothbrush concerning a 5th embodiment of the present invention. It is a side view of the toothbrush concerning the fifth embodiment of the present invention.
- toothbrushes used for the comparative example It is a top view of the toothbrush concerning the 6th embodiment of the present invention. It is a side view of the toothbrush concerning the 6th embodiment of the present invention. It is a top view of the toothbrush used for the comparative example. It is a side view of the toothbrush used for the comparative example. It is a top view of the toothbrush used for the comparative example. It is a side view of the toothbrush used for the comparative example. It is a top view of the toothbrush used for the comparative example. It is a side view of the toothbrush used for the comparative example. It is a top view of the toothbrush used for the comparative example. It is a side view of the toothbrush used for the comparative example. It is a top view of the toothbrush used for the comparative example. It is a side view of the toothbrush used for the comparative example. It is a top view of the toothbrush used for the comparative example. It is a top view of the toothbrush used for the comparative example. It is a top view of the toothbrush used for the comparative example
- a toothbrush 1 shown in FIGS. 1A and 1B includes a head portion 2 and a long handle portion 3 extending from the head portion 2, and a first hair bundle group 30 is formed on a flocked surface 20 of the head portion 2.
- the second hair bundle group 40 is provided.
- reference numeral 22 indicates one side edge in the width direction of the head portion 2
- reference numeral 24 indicates the other side edge in the width direction of the head portion 2.
- the width direction of the head portion 2 is a direction orthogonal to the direction from the head portion distal end 21 toward the boundary (head portion base end) between the head portion 2 and the handle portion 3.
- the first hair bundle group 30 is provided substantially at the center of the flocked surface 20, heading from the head portion distal end 21 to the head portion proximal end, and one first hair bundle 32 is provided in the first row (1 ⁇ 1). 1 row) and 2 (2 ⁇ 5 rows) in the 2nd to 6th rows.
- the second hair bundle group 40 includes seven second hair bundles 42 planted from the head portion tip 21 along the side edge 22, and 7 planted from the head portion tip 21 along the side edge 24. Two second hair bundles 42. That is, the second hair bundle group 40 is planted so that the second hair bundle 42 surrounds the first hair bundle group 30 along the peripheral edge of the head part 2 except for the head part base end side. It is a substantially U shape in plan view with the head portion proximal end open.
- the opened part in the second hair bundle group may be referred to as an open part.
- three first hair bundles 32 are implanted between the region where the second hair bundle group 40 is provided and the head portion base end.
- the distance L2 from the second hair bundle 42 closest to the head portion distal end 21 to the second hair bundle 42 closest to the head portion proximal end is the most from the second hair bundle 42 closest to the head portion distal end 21.
- the distance is set to 7/8 with respect to the distance L1 to the first hair bundle 32 near the head portion base end.
- the length of the first hair bundle 32 that is, the length T1 from the flocked surface 20 to the tip of the first hair bundle 32 is the length of the second hair bundle 42, that is, the second hair bundle from the flocked surface 20.
- the length to the tip of 42 is shorter than T2.
- the head portion 2 and the handle portion 3 are integrally formed in a long shape as a whole (hereinafter, the head portion 2 and the handle portion 3 are integrally formed is referred to as a handle body.
- a handle body For example, it is obtained by injection molding using a resin as a material.
- the resin constituting the handle body can be determined in consideration of the rigidity and mechanical characteristics required for the toothbrush 1, and examples thereof include a high-hardness resin having a flexural modulus (JIS K7203) in the range of 500 to 3000 MPa.
- high-hardness resins examples include polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexylenedimethylene terephthalate (PCT), polyacetal (POM), polystyrene (PS), and acrylonitrile.
- PP polypropylene
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- PCT polycyclohexylenedimethylene terephthalate
- POM polyacetal
- PS polystyrene
- PS polystyrene
- ABS -Butadiene / styrene resin
- ABS cellulose propionate
- AS acrylonitrile / styrene copolymer resin
- the handle portion 3 may be partially or entirely covered with a flexible resin such as an elastomer.
- the size of the head portion 2 can be determined in consideration of the operability in the oral cavity, for example, the width is 10 mm to 15 mm and the thickness is 4 mm to 8 mm.
- the buckling strength of the first hair bundle 32 only needs to be lower than the buckling strength of the second hair bundle 42 described later, and is preferably 0.5N or more and 5N or less, and more preferably 1N or more and 3N or less. If it is less than 0.5 N, the hair and hips (repulsive force) are too soft, and there is a possibility that the interdental part and the cervical part cannot be sufficiently scraped. If it exceeds 5N, the second hair bundle 32 may not easily enter the interdental region or the cervical region.
- the buckling strength of the hair bundle is the maximum load obtained by calculating the actual length of the hair bundle in units of the hair bundle using a compression tester according to JIS S3016 (5.3 (2.2)).
- the length T1 of the first hair bundle 32 can be determined in consideration of the buckling strength required for the first hair bundle 32, the material and thickness of the hair constituting the first hair bundle 32, for example, 6 mm or more and 11 mm or less is preferable.
- the lengths T1 of all the first hair bundles 32 constituting the first hair bundle group 30 may be the same or different from each other.
- the length T1 of the first hair bundle 32 is the length of the longest hair among the hairs constituting the first hair bundle 32.
- the thickness (hair bundle diameter) R1 of the first hair bundle 32 takes into consideration the buckling strength required for the first hair bundle 32, the material and thickness of the hair constituting the first hair bundle 32, and the like. For example, 1 mm or more and 2 mm or less are preferable.
- the hair bundle diameters R1 of all the first hair bundles 32 constituting the first hair bundle group 30 may be the same or different from each other.
- the hair bundle diameter R1 of the first hair bundle 32 is the diameter of the first hair bundle 32 on the flocked surface 20.
- the diameter gradually decreases from the position of 0 mm to 5 mm from the flocked surface 20 as the starting point (0 mm) toward the tip of the hair.
- Hairs with sharpened tips (tapered hairs), hairs with the same diameter from the planted surface 20 toward the tips of the hairs (straight hairs), etc. are mentioned, among which tapered hairs are preferred.
- the diameter from the flocked surface to the tip of the hair is the same, that the diameter of the horizontal cross section of each hair of the second hair bundle is any horizontal from the flocked surface to the tip of the hair. It means that the cross section is substantially the same.
- “Substantially the same” means that a variation within ⁇ 10% is allowed for reasons such as machining accuracy. This is because the tapered hair enters the interproximal portion or the cervical portion, and can easily scrape off the interdental portion or the cervical portion.
- the said taper hair means the hair for which the shape of the cross section which passes along the front-end
- the hair tip refers to the position from 1 mm or less from the tip of the hair to the tip of the hair.
- Examples of the straight hair include those in which the tip of the hair is a plane parallel to the flocked surface 20, and those in which the tip of the hair is rounded into a hemisphere.
- the plane in which the tips of the hairs are parallel to the flocked surface means that the opposite side of the cross section in the horizontal direction of the tip of each of the bristles is substantially parallel to the opposite side of the flocked surface. “Substantially parallel” means that a variation within ⁇ 10% is allowed for reasons such as machining accuracy.
- the material of the hair constituting the first hair bundle 32 is, for example, polyamide such as 6-12 nylon (6-12NY), 6-10 nylon (6-10NY), PET, PBT, polytrimethylene terephthalate (PTT). ), Polyesters such as polyethylene naphthalate (PEN) and polybutylene naphthalate (PBN), synthetic resins such as polyolefins such as PP, elastomers such as olefin elastomers and styrene elastomers. A plurality of these resin materials may be used in combination, and among them, a mixture of a plurality of polyesters is preferable in that the hair can be easily hardened and the plaque scraping property becomes higher.
- polyamide such as 6-12 nylon (6-12NY), 6-10 nylon (6-10NY
- PET polytrimethylene terephthalate
- PBT polytrimethylene terephthalate
- PEN polyethylene naphthalate
- PBN polybutylene naphthalate
- synthetic resins such as poly
- the bristle examples include polyester bristle having a multi-core structure having a core part and at least one or more sheath parts provided outside the core part.
- polyester bristle having a multi-core structure having a core part and at least one or more sheath parts provided outside the core part.
- different polyesters can be used for the core portion and the sheath portion, so that the mechanical properties can be easily adjusted. For this reason, it is possible to easily obtain hair having a hard hair and a higher plaque scraping property.
- the cross-sectional shape of the bristle constituting the first bristle bundle 32 is preferably a circular shape, but is not necessarily limited to a circular shape, and may be an arbitrary shape depending on the intended use of the toothbrush 1.
- the shape may be an ellipse, a polygon (for example, a triangle, a quadrangle, a pentagon, a hexagon, or the like), an irregular shape (for example, a star shape, a three-leaf clover shape, a four-leaf clover shape, or the like).
- the thickness of the hair constituting the first hair bundle 32 is not particularly limited.
- the hair and waist become hard and the effect of scraping the plaque becomes higher. It is preferably 12 mil or less.
- the hair is hardened by using hair having a multi-core structure or hair made of a polyester mixture as the hair, a high scraping effect can be obtained even if the hair is less than 6 mils.
- two or more hairs having different thicknesses may be used in any combination in consideration of feeling of use, cleaning feeling, cleaning effect, durability, and the like.
- the buckling strength of the second hair bundle 42 only needs to be higher than the buckling strength of the first hair bundle 32, and is preferably 1N or more and 6N or less, and more preferably 1.5N or more and 3.5N or less. If it is less than 1N, the hair and hips may be too soft and the tooth surface or the occlusal surface may not be sufficiently cleaned. If it exceeds 6 N, the second hair bundle 42 is difficult to bend, It becomes difficult for the hair bundle 32 to reach the interdental part or the tooth neck part.
- the buckling strength ratio represented by [(the buckling strength of the first bristle bundle) / (the buckling strength of the second bristle bundle)] can be determined according to the function required for the toothbrush 1, for example, 0.
- the hair of the first hair bundle 32 is too soft, and there is a possibility that the interdental part or the tooth neck part cannot be sufficiently cleaned. If it exceeds 0.9, the hair of the first hair bundle 32 is too hard, and it may be difficult to enter the interdental portion or the tooth neck portion.
- the length T2 of the second hair bundle 42 only needs to be longer than the length T1 of the first hair bundle 32, and can be determined in consideration of the material and thickness of the hair constituting the second hair bundle 42. For example, 8 mm or more and 13 mm are preferable.
- the hair length difference D1 between the length T2 of the second hair bundle 42 and the length T1 of the first hair bundle 32 represented by [T2-T1] is not particularly limited, but is, for example, 0.3 mm or more 3 mm or less is preferable and 0.5 mm or more and 2 mm or less are more preferable. If it is less than 0.3 mm, it is difficult to obtain the effect of making the first hair bundle 32 shorter than the second hair bundle 42, and if it exceeds 3 mm, the first hair bundle 32 is interdental or cervical part. It becomes difficult to reach.
- the hair bundle diameter R2 of the second hair bundle 42 is the same as the hair bundle diameter R1 of the first hair bundle 32.
- Examples of the hair constituting the second hair bundle 42 include tapered hair and straight hair, among which straight hair is preferred, and straight hair with the tip of the hair rounded is preferred. Since the second hair bundle 42 is composed of straight hair, the occlusal surface and the tooth surface of the back teeth can be cleaned more satisfactorily.
- the material of the hair constituting the second hair bundle 42 is the same as the material of the hair constituting the first hair bundle 32.
- the cross-sectional shape of the hair constituting the second hair bundle 42 is the same as the cross-sectional shape of the hair constituting the first hair bundle 32.
- the toothbrush 1 is reciprocated in a direction connecting the head portion distal end 21 and the head portion proximal end.
- the second hair bundle group 40 slides on the teeth while wrapping the back teeth, and the second hair bundle 42 having a high buckling strength is formed between the occlusal surface and the tooth surface. Scrape off the attached dirt.
- the first hair bundle group 30 abuts on the occlusal surface, and the first hair bundle 32 having a low buckling strength scrapes off dirt while entering a fine recess or interdental portion of the occlusal surface.
- the head portion base of the second hair bundle group 40 is used. Since the end side is open, the 1st hair
- the first hair bundle group 30 in which the first hair bundle 32 is implanted and the second hair bundle 42 open the head portion distal end 21 direction or the head portion proximal end direction.
- a second hair bundle group 40 that is planted around the first hair bundle group 30, and the length of the first hair bundle 32 is shorter than the length of the second hair bundle 42, Since the buckling strength of one hair bundle 32 is lower than the buckling strength of the second hair bundle 42, the occlusal surface and tooth surface of the interdental portion, the neck portion, and the back teeth can be cleaned well.
- the bristles constituting the first hair bundle 32 are tapered hairs, the interdental portion, the cervical portion, or the concave portion of the occlusal surface can be better cleaned.
- the hairs constituting the second hair bundle 42 are straight hairs, the second hair bundle 42 applies a stronger pressure to the occlusal surface and the tooth surface, and can more effectively scrape off the dirt.
- the distance L3 from the second bristle bundle 42 closest to the head end 21 to the second bristle bundle 42 closest to the base end is the second bristle bundle 42 closest to the head end 21.
- To the first hair bundle 32 closest to the base end of the head portion is set to a distance of 1/2 or less.
- the first hair bundle 32 is arranged in 4 ⁇ 3 rows, three in order from the head portion distal end 21 side. ⁇ 1 row is planted.
- the second hair bundle group 140 is formed only in a region that is 50% or less of the length of the flocked region from the head portion distal end 21 toward the head portion proximal end, and from the head portion proximal end to the head portion. Only the first hair bundle 32 is implanted in an area of 50% or more of the length of the flocked area toward the tip 21. That is, the second hair bundle group 140 is formed only in the flocked region exceeding 0% and 50% or less with respect to the length from the head portion tip 21 to the head portion base end, and the head portion tip 21 to the head portion.
- bristle bundle 32 is planted only in the hair transplant area
- the toothbrush 100 of this embodiment is provided with the second bristle bundle group 140 only near the head portion tip 21, the occlusal surface and tooth surface of the back teeth can be cleaned with high pressure.
- a region of 50% or more of the flocked region from the head portion base end toward the head portion front end 21, that is, a region of 50% to 100% of the flocked region with respect to the length from the head portion front end 21 to the head portion base end since only the first bristle bundle 32 having a soft bristles is implanted, it is suitable for cleaning the interdental part or the cervical part.
- the toothbrush 200 shown in FIG. 3A and FIG. 3B includes a first hair bundle group 230 and a second hair bundle group 240 surrounding the first hair bundle group 230, a first hair bundle group 232 and a second hair surrounding the first hair bundle group 232.
- the hair bundle group 242 is provided.
- the first hair bundle group 230 is 0% or less of the area of 50% or less of the flocked region from the head portion distal end 21 toward the head portion proximal end, that is, the length of the head portion distal end 21 to the head portion proximal end.
- the first hair bundle 32 is provided in order of 1 ⁇ 1 row and 2 ⁇ 2 rows in order from the head portion tip 21.
- the second hair bundle group 240 is provided so as to open the head portion proximal end side and surround the first hair bundle group 230, and the second hair bundle 42 is located on the side edge from the head portion distal end 21. 4 along the side 22 and four along the side edge 24 from the head portion tip 21.
- the first hair bundle group 232 is 50% or less of a region of 50% or less of the flocked region from the head portion proximal end toward the head portion distal end 21, that is, the length from the head portion distal end 21 to the head portion proximal end.
- the first hair bundle 32 is provided in 2 ⁇ 2 rows from the head portion base end.
- the second hair bundle group 242 is provided so as to open the head portion distal end 21 side and surround the first hair bundle group 232, and the second hair bundle 42 is located close to the head portion proximal end. Two along the side edge 22 and two along the side edge 24.
- the open portion of the second hair bundle group 240 and the open portion of the second hair bundle group 242 are opposed to each other.
- the first hair bundles 32 are planted in 4 ⁇ 1 rows between the region where the second hair bundle group 240 is provided and the region where the second hair bundle group 242 is provided. ing.
- the second hair bundle group 240 provided near the head portion distal end 21 and the second hair bundle group 242 provided near the head portion proximal end have their open portions facing each other. It is provided as follows. For this reason, both when the head part 2 is operated so as to be pulled out from the oral cavity and when it is operated so as to be inserted into the interior of the oral cavity, the teeth are in the second hair bundle group 240 or the second hair bundle group 240. The hair bundle group 242 is wrapped. As a result, the interdental part or the tooth neck part by the first hair bundle 32 and the occlusal surface or the tooth surface by the second hair bundle 42 can be better cleaned.
- the toothbrush 300 shown in FIG. 4A and FIG. 4B includes a first hair bundle group 330 and a second hair bundle group 340 surrounding the first hair bundle group 330, a first hair bundle group 332 and a second hair surrounding the second hair bundle group 340.
- the hair bundle group 342 is provided.
- the first hair bundle group 330 is 0% or less with respect to a region of 50% or less of the flocked region from the head portion distal end 21 toward the head portion proximal end, that is, the length from the head portion distal end 21 to the head portion proximal end.
- the first hair bundle 32 is implanted in 1 ⁇ 1 row and 2 ⁇ 1 row in order from the head portion tip 21.
- the second hair bundle group 340 is provided so as to open the proximal end side of the head part and surround the first hair bundle group 330, and the second hair bundle 42 is located on the side edge from the head part distal end 21. 3 along the side 22, and three along the side edge 24 from the head portion tip 21.
- the first hair bundle group 332 is 50% or less of a region of 50% or less of the flocked region from the head base end to the head tip 21, that is, the length from the head tip 21 to the head base end.
- the first hair bundle 32 is provided in 1 ⁇ 1 row and 2 ⁇ 1 row from the head end of the head portion.
- the second hair bundle group 342 is provided so as to open the base end side of the head part and surround the first hair bundle group 332, and the second hair bundle 42 is located close to the head part tip 21.
- the open portion of the second hair bundle group 340 and the open portion of the second hair bundle group 342 are both formed on the head portion base end side.
- the first hair bundles 32 are implanted in 4 ⁇ 2 rows. Yes.
- the second hair bundle group 340 provided near the head portion distal end 21 and the second hair bundle group 342 provided near the head portion proximal end are both open at the head portion. It faces the base end. For this reason, when the head part 2 is operated so as to be pulled out from the oral cavity, the interdental or cervical part is cleaned by the first hair bundle 32 and the occlusal surface or tooth surface by the second hair bundle 42. Can be better cleaned.
- FIGS. 5A and 5B A toothbrush according to a fifth embodiment of the present invention will be described below with reference to FIGS. 5A and 5B.
- symbol is attached
- the toothbrush 400 shown in FIGS. 5A and 5B has a second hair bundle group 440 surrounding the first hair bundle group 330 and the second hair bundle group 440 on the flocked surface 20, and a second hair bundle group 440.
- a third hair bundle 452 longer than the hair bundle 442 is provided.
- the second hair bundle group 440 of the present embodiment is provided so as to open the head portion base end side and surround the first hair bundle group 330, and the second hair bundle group 442 is provided at the tip of the head portion.
- the three are planted along the side edge 22 from the head 21 and the three along the side edge 24 from the head portion tip 21.
- the upper end surface of the second hair bundle group 440 is an inclined surface that gradually approaches the flocked surface from the head portion distal end 21 toward the head portion proximal end.
- first hair bundles 32 ⁇ 1 row between the region where the second hair bundle group 440 is provided and the head portion base end, in order from the head portion distal end 21, there are four first hair bundles 32 ⁇ 1 row, and a third hair bundle 452. 4 ⁇ 1 row, first hair bundle 32 is 4 ⁇ 1 row, third hair bundle 452 is 4 ⁇ 1 row, and first hair bundle 32 is 3 ⁇ 1 row. .
- the height on the flocked surface 20 of the second hair bundle group 440 closest to the head portion tip 21, that is, the length T3 of the second hair bundle 442 closest to the head portion tip 21 is the height of the second hair bundle 42. It is the same as the length T2.
- the height on the flocked surface 20 of the second hair bundle group 440 closest to the proximal end of the head portion that is, the length of the hair closest to the proximal end of the head portion among the hairs constituting the second hair bundle 442
- the length T4 is shorter than the length T3.
- the length T4 is preferably equal to or greater than the length T1, and more preferably longer than the length T1.
- Examples of the second hair bundle 442 include tapered hair and straight hair. Among these, straight hair is preferable, and straight hair with the tip of the hair rounded is more preferable.
- the hair bundle diameter of the second hair bundle 442 is the same as the hair bundle diameter R2 of the second hair bundle 42.
- the material of the hair constituting the second hair bundle 442 is the same as the material of the hair constituting the second hair bundle 42, and the cross-sectional shape of the hair constituting the second hair bundle 442 is This is the same as the cross-sectional shape of the hair that constitutes the second hair bundle 42.
- the thickness of the hair constituting the second hair bundle 442 is the same as the hair constituting the second hair bundle 42.
- the third hair bundle 452 is not particularly limited, but preferably has a buckling strength lower than that of the second hair bundle 442.
- the buckling strength ratio represented by [(the buckling strength of the hair bundle of the third hair bundle) / (the buckling strength of the second hair bundle)] can be determined according to the function required of the toothbrush 400, for example, 0.4 to 0.9 is preferable, and 0.5 to 0.8 is more preferable. If it is less than 0.4, the hair of the third hair bundle 452 is too soft, and there is a possibility that the interdental part or the tooth neck part cannot be sufficiently cleaned. If it exceeds 0.9, the hair of the third hair bundle 452 may be too hard to enter the interdental portion or the neck portion. This is because the third hair bundle 452 has a buckling strength lower than that of the second hair bundle 442 so that the third hair bundle 452 can easily enter the interproximal portion or the tooth neck portion.
- the length T5 of the third hair bundle 452 is longer than the length T3 of the second hair bundle 442.
- the hair length difference D2 represented by [T5-T3] is preferably 0.2 mm or more and 1.5 mm or less, for example. If it is less than 0.2 mm, the effect of implanting the third hair bundle 452 is difficult to obtain, and if it exceeds 1.5 mm, the operability in the oral cavity may be impaired.
- the thickness (hair bundle diameter) R3 of the third hair bundle 452 takes into consideration the buckling strength required for the third hair bundle 452, the material and thickness of the hair constituting the third hair bundle 452, and the like. For example, 1 mm or more and 2 mm or less are preferable.
- the hair bundle diameter R3 of the third hair bundle 452 is the diameter of the third hair bundle 452 on the flocked surface 20.
- the hair that constitutes the third hair bundle 452 is a tapered hair.
- bristle bundle 452 By making the 3rd hair
- the material of the hair constituting the third hair bundle 452 is the same as the material of the hair constituting the first hair bundle 32, and the cross-sectional shape of the hair constituting the third hair bundle 452 is It is the same as the cross-sectional shape of the hair used for the first hair bundle 32.
- the thickness of the hair constituting the third hair bundle 452 is the same as the hair constituting the first hair bundle 32.
- the teeth The interspace or tooth neck can be cleaned better.
- FIGS. 6A and 6B A toothbrush according to a sixth embodiment of the present invention will be described below with reference to FIGS. 6A and 6B.
- symbol is attached
- the toothbrush 500 shown in FIG. 6A and FIG. 6B has a second hair bundle group 440 surrounding the first hair bundle group 330 and the second hair bundle group 440 on the flocked surface 20, and a second hair bundle group 440.
- a third hair bundle 452 longer than the hair bundle 442 is provided.
- the hair bundle 32 is planted.
- the teeth The interspace or tooth neck can be cleaned better.
- the present invention is not limited to the embodiment described above.
- the hair bundle implanted outside the second hair bundle group is It is not limited to the first hair bundle.
- the hair bundle adjacent to the open portion of the second hair bundle group (for example, in the first embodiment, the hair bundle is implanted between the region where the second hair bundle group is provided and the head portion base end).
- the four first hair bundles preferably have a buckling strength equal to or less than that of the second hair bundle constituting the second hair bundle group, and more preferably have a length equal to or less than that.
- the first hair bundle group constituting the first hair bundle group It is difficult for the hair bundle to hit the teeth, and there is a risk that the interdental or cervical parts will not be sufficiently cleaned.
- the second hair bundle group is provided only near the head portion tip, but the present invention is not limited to this, and the second hair bundle group is provided only near the head portion base end.
- a hair bundle group may be provided.
- the hair bundles are arranged in a line in the width direction of the head portion.
- the present invention is not limited to this, and the hair bundles adjacent in the width direction of the head portion are connected to each other. They may be displaced from each other in the direction from the head of the head toward the base of the head.
- Example 1 A toothbrush similar to the toothbrush 1 of FIGS. 1A and 1B was produced according to the specifications described in Table 1. This toothbrush has a handle body made of PET. About the obtained toothbrush, a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table. In addition, “taper” in the column of “hair type” in the table indicates a taper hair, and “straight” indicates a straight hair with the end of the hair rounded (the same applies hereinafter).
- Example 2 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 100 of FIGS. 2A and 2B was used. About the obtained toothbrush, a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Example 3 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 200 of FIGS. 3A and 3B was used. About the obtained toothbrush, a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Example 4 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 300 of FIGS. 4A and 4B was used. About the obtained toothbrush, a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Example 5 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 400 of FIGS. 5A and 5B was used. About the obtained toothbrush, a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- the length “10.5-9” of the second hair bundle indicates that the length T3 in FIGS. 5A and 5B is 10.5 mm and the length T4 is 9 mm.
- the buckling strength (N) of the second hair bundle “2.4-2.7” means that the buckling strengths of the three second hair bundles having different lengths are 2.4 N or more and 2.7 N. Indicates the following (the same applies hereinafter).
- Example 6 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 500 of FIGS. 6A and 6B was used. About the obtained toothbrush, a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Example 1 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 900 shown in FIGS. 7A and 7B was used.
- the toothbrush 900 is implanted between the region provided with the second hair bundle group 240 and the region provided with the second hair bundle group 242 in the toothbrush 200 (FIGS. 3A and 3B).
- One first hair bundle 32 is replaced with a second hair bundle 42. That is, the toothbrush 900 is one in which the head portion distal end 21 direction and the head portion proximal end direction are surrounded by the second bristle bundle 42.
- a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Example 2 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 901 shown in FIGS. 8A and 8B was used.
- the toothbrush 901 includes two second hair bundles 42 planted closest to the head portion tip 21 in the second hair bundle group 40 in the toothbrush 1 (FIGS. 1A and 1B). 32. That is, the toothbrush 901 opens the head portion distal end 21 direction and the head portion proximal end direction and surrounds the first hair bundle 32.
- a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Example 3 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 902 shown in FIGS. 9A and 9B was used.
- the toothbrush 902 is obtained by replacing all the second hair bundles 42 with the first hair bundles 32 in the toothbrush 1 (FIGS. 1A and 1B).
- a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Example 4 A toothbrush was obtained in the same manner as in Example 1 except that a toothbrush similar to the toothbrush 903 shown in FIGS. 10A and 10B was used.
- the toothbrush 903 is obtained by replacing all the first hair bundles 32 with the second hair bundles 42 in the toothbrush 1 (FIGS. 1A and 1B).
- a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Example 5 A toothbrush was obtained in the same manner as in Example 2 except that a toothbrush similar to the toothbrush 904 shown in FIGS. 11A and 11B was used.
- the toothbrush 904 all the first hair bundles 32 in the toothbrush 100 (FIGS. 2A and 2B) are set as the first hair bundles 932, and all the second hair bundles 42 are shorter than the first hair bundle 932.
- a second hair bundle 942 is obtained.
- a back tooth cleaning power, an interdental cleaning power, and a tooth comprehensive feeling are evaluated, and the result is shown in the table.
- Plaque removal rate (%) ((Plaque occupation area before cleaning ability test ⁇ Plaque occupation area after cleaning ability test) / (Plate occupation area before cleaning ability test)) ⁇ 100 (1 )
- ⁇ Dental feeling of teeth> Ten monitors cleaned the oral cavity using the toothbrush of each example, and evaluated the touch in the oral cavity according to the following evaluation criteria.
- An average score of 10 or more monitors is 4.0 or higher, "A”, an average score of 3.0 or higher and lower than 4.0 is "B”, and an average score of 2.0 or higher and lower than 3.0 is "C”
- the average score of less than 2.0 was defined as “D”.
- the present invention it is possible to provide a toothbrush that can satisfactorily clean the occlusal surface and tooth surface of the interdental portion, the tooth neck portion, and the back teeth.
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Abstract
Description
本願は、2011年2月25日に、日本に出願された特願2011-040060号に基づき優先権を主張し、その内容をここに援用する。
このような歯ブラシは、歯間又は歯頸部に進入させるための毛束が、長くかつ柔らかい用毛により構成され、奥歯の咬合面や歯面を清掃する毛束が、短くかつ硬い用毛により構成されるのが一般的である。
また、特許文献2には、ヘッド部の前端寄りで植毛面の周縁に沿って略U字型に配され、かつ2つ並べられた大口径毛束と、ヘッド部の後端寄りに配された小口径毛束とを有し、大口径毛束の植毛範囲の外周を取り囲む前端側植毛領域の植毛密度を、小口径毛束の植毛範囲の外周を取り囲む前端側植毛領域の植毛密度よりも高くした歯ブラシが提案されている。
特許文献3には、長さが一定以上の長ブリッスルと長さが一定以下の短ブリッスルとからなり、長ブリッスルの少なくとも先端側の径を短ブリッスルの径よりも小さく形成してなる歯ブラシが提案されている。
特許文献4には、ブラシ植込み面の中央部に短ブラシと、前記短ブラシの周囲に長ブラシを設けて、ブラシ全体を凹形とした歯ブラシが提案されている。
そこで、本発明は、歯間部、歯頸部並びに奥歯の咬合面及び歯面を良好に清掃できる歯ブラシを目的とする。
前記第一の毛束は、植毛面を起点として0mm以上5mm以下の位置から用毛の先端に向かい漸次その径が小さくなり、前記用毛の毛先が先鋭化された用毛を備えることを特徴とする歯ブラシ。
前記第二の毛束群は、前記ヘッド部の先端寄りにのみ形成されていることを特徴とする歯ブラシ。
前記第二の毛束群の外側に、前記第二の毛束の長さより長い第三の毛束が植設され、前記第三の毛束は、植毛面を起点として0mm以上5mm以下の位置から用毛の先端に向かい漸次その径が小さくなり、前記用毛の毛先が先鋭化された用毛を備えることを特徴とする歯ブラシ。
前記第二の毛束は、毛先が先鋭化されていない用毛からなることを特徴とする歯ブラシ。
前記第二の毛束は、植毛面から用毛の先端に向かいその径が同一であることを特徴とする歯ブラシ。
前記第二の毛束は、用毛の先端が植毛面に平行な平面であることを特徴とする歯ブラシ。
前記第二の毛束は、用毛の先端が半球状に丸められたものであることを特徴とする歯ブラシ。
前記第二の毛束の長さと前記第一の毛束の長さとの毛長差は、0.3mm以上3mm以下であることを特徴とする歯ブラシ。
[(前記第一の毛束の座屈強度)/(前記第二の毛束の座屈強度)]で表される座屈強度比は、0.4以上0.9以下であることを特徴とする歯ブラシ。
前記第三の毛束の長さと前記第二の毛束の長さとの毛長差は、0.2mm以上1.5mm以下であることを特徴とする歯ブラシ。
[(第三の毛束の毛束の座屈強度)/(第二の毛束の座屈強度)]で表される座屈強度比は、0.4以上0.9以下であることを特徴とする歯ブラシ。
ヘッド部先端からヘッド部基端までの長さに対して、0%を超えて50%以下の植毛領域に、前記第二の毛束群が植設されていることを特徴とする歯ブラシ。
本発明の歯ブラシによれば、前記第一の毛束は、用毛の先端に向かい漸次その径が小さくなり、毛先が先鋭化された用毛を備えるため、歯間部や歯頸部をより良好に清掃できる。
本発明の歯ブラシによれば、前記第二の毛束群は、前記ヘッド部の先端寄りにのみ形成されているため、奥歯の咬合面や歯面をより良好に清掃できる。
本発明の歯ブラシによれば、前記第二の毛束群の外側に、前記第二の毛束の長さより長い第三の毛束が植設され、前記第三の毛束は、用毛の先端に向かい漸次その径が小さくなり、毛先が先鋭化された用毛を備えるため、歯間部や歯頸部をより良好に清掃できる。
本発明の歯ブラシによれば、前記第二の毛束は、毛先が先鋭化されていない用毛、すなわち、植毛面から用毛の先端に向かいその径が同一であるため、奥歯の咬合面や歯面をより良好に清掃できる。ここで、植毛面から用毛の先端に向かいその径が同一であるとは、前記第二の毛束の各用毛の水平断面の直径が、植毛面から用毛の先端までのいずれの水平断面においても実質的に同一であることを意味する。実質的に同一とは、加工精度等の理由で、±10%以内のばらつきを許容することを意味する。
本発明の第一の実施形態にかかる歯ブラシについて、以下に図1A及び図1Bを参照して説明する。
図1A及び図1Bに示す歯ブラシ1は、ヘッド部2とヘッド部2に延設された長尺状のハンドル部3とを備え、ヘッド部2の植毛面20に第一の毛束群30と第二の毛束群40とを備えるものである。図1A及び図1B中、符号22は、ヘッド部2の幅方向の一方の側縁を示し、符号24は、ヘッド部2の幅方向の他方の側縁を示す。なお、ヘッド部2の幅方向は、ヘッド部先端21から、ヘッド部2とハンドル部3との境界(ヘッド部基端)へ向かう方向に直交する方向である。
第二の毛束群40は、ヘッド部先端21から側縁22に沿って植設された7つの第二の毛束42と、ヘッド部先端21から側縁24に沿って植設された7つの第二の毛束42とで構成されている。即ち、第二の毛束群40は、第二の毛束42が、ヘッド部2の周縁に沿って、ヘッド部基端側を除き第一の毛束群30を囲むように植設されたものであり、ヘッド部基端側が開放された平面視略U字状とされている。以下、第二の毛束群における開放された部分を開放部ということがある。
そして、最もヘッド部先端21寄りの第二の毛束42から最もヘッド部基端寄りの第二の毛束42までの距離L2は、最もヘッド部先端21寄りの第二の毛束42から最もヘッド部基端寄りの第一の毛束32までの距離L1に対し、7/8の距離とされている。
第一の毛束32の長さ、即ち植毛面20から第一の毛束32の先端までの長さT1は、第二の毛束42の長さ、即ち植毛面20から第二の毛束42の先端までの長さT2よりも短いものとされている。
ハンドル体を構成する樹脂は、歯ブラシ1に求める剛性や機械特性等を勘案して決定でき、例えば、曲げ弾性率(JIS K7203)が500~3000MPaの範囲にある高硬度樹脂が挙げられる。このような高硬度樹脂としては、例えば、ポリプロピレン(PP)、ポリエチレンテレフタレート(PET)、ポリブチレンテレフタレート(PBT)、ポリシクロへキシレンジメチレンテレフタレート(PCT)、ポリアセタール(POM)、ポリスチレン(PS)、アクリロニトリル・ブタジエン・スチレン樹脂(ABS)、セルロースプロピオネート(CP)、ポリアリレート、ポリカーボネート、アクリロニトリル・スチレン共重合樹脂(AS)等が挙げられる。これらは1種単独で又は2種以上を適宜組み合わせて用いることができる。
また、ハンドル部3は、例えばエラストマー等の柔軟な樹脂が部分的又は全体に被覆されていてもよい。
テーパー毛は、歯間部又は歯頸部へ進入し、歯間部又は歯頸部の汚れを容易に掻き出せるためである。前記テーパー毛とは、植毛面に対して垂直方向であって、用毛の先端を通る断面の形状が、たとえば放物線や三角形等である形状である用毛を意味する。
尚、毛先とは、用毛の先端から1mm以下の位置から用毛の先端までを指す。
ストレート毛としては、用毛の先端が植毛面20に平行な平面とされたものや、用毛の先端が半球状に丸められたものが挙げられる。
ここで、用毛の先端が植毛面に平行な平面とは、各用毛の先端の水平方向の断面の対辺が、植毛面の対辺と実質的に平行であることを意味する。実質的に平行とは、加工精度等の理由で、±10%以内のばらつきを許容することを意味する。
これらの樹脂材料は、複数組み合わせて用いてもよく、中でも、容易に毛腰を硬くでき、歯垢の掻き取り性がより高くなる点で、複数のポリエステルの混合物が好ましい。
また、用毛としては、芯部と前記芯部の外側に設けられた少なくとも1層以上の鞘部とを有する多重芯構造を有するポリエステル製用毛が挙げられる。多重芯構造を有すると、芯部と鞘部とで異なるポリエステルを用いることができるため、機械的物性の調整が容易になる。このため、毛腰が硬く、歯垢の掻き取り性がより高い用毛を容易に得ることができる。
また、使用感、刷掃感、清掃効果、耐久性等考慮して、太さの異なる2本以上の用毛を任意に組み合わせて用いてもよい。
[(第一の毛束の座屈強度)/(第二の毛束の座屈強度)]で表される座屈強度比は、歯ブラシ1に求める機能に応じて決定でき、例えば、0.4以上0.9以下が好ましく、0.5以上0.8以下がより好ましい。0.4未満であると、第一の毛束32の毛腰が柔らかすぎて、歯間部又は歯頸部を十分に清掃できないおそれがある。0.9超であると、第一の毛束32の毛腰が硬すぎて、歯間部又は歯頸部に進入しにくくなるおそれがある。
第二の毛束42を構成する用毛の横断面形状は、第一の毛束32を構成する用毛の横断面形状と同様である。
口腔内で、ヘッド部先端21とヘッド部基端とを結ぶ方向に、歯ブラシ1を往復動させる。例えば、奥歯の咬合面を清掃する際には、第二の毛束群40が奥歯を包み込みながら歯牙に摺動し、座屈強度の高い第二の毛束42が咬合面と歯面とに付着した汚れを掻き取る。加えて、第一の毛束群30が咬合面に当接し、座屈強度の低い第一の毛束32が咬合面の細かな凹部や歯間部に進入しつつ汚れを掻き出す。また、頬側(外側)又は舌側(内側)の歯面を清掃する際には、ヘッド部2が口腔内から引き出されるように操作されると、第二の毛束群40のヘッド部基端側が開放されているため、第一の毛束32が優先的に歯牙に当接する。そして、第一の毛束32は、座屈強度が低いために容易に撓み、歯間部又は歯頸部に進入し、汚れを掻き出す。また、ヘッド部2が口腔内の奥に挿入されるように操作されると、第二の毛束42が優先的に歯牙に当接する。そして、座屈強度が高い第二の毛束42は、歯面に強い圧力をかけ、良好に汚れを掻き取る。
加えて、第一の毛束32を構成する用毛がテーパー毛であると、歯間部、歯頸部又は咬合面の凹部をより良好に清掃できる。
さらに、第二の毛束42を構成する用毛がストレート毛であると、第二の毛束42が咬合面や歯面により強い圧力をかけ、より良好に汚れを掻き取ることができる。
本発明の第二の実施形態にかかる歯ブラシについて、以下に図2A及び図2Bを参照して説明する。
なお、第一の実施形態と同じ構成には同じ符号を付してその説明を省略し、主に第一の実施形態と異なる点について説明する。
図2A及び図2Bに示す歯ブラシ100は、植毛面20に第一の毛束群130と第二の毛束群140とを備えるものである。
即ち、本実施形態において、第二の毛束群140が、ヘッド部先端21からヘッド部基端に向かう植毛領域の長さの50%以下の領域にのみ形成され、ヘッド部基端からヘッド部先端21に向かう植毛領域の長さの50%以上の領域には、第一の毛束32のみが植設されている。
すなわち、ヘッド部先端21からヘッド部基端までの長さに対して、0%を超えて50%以下の植毛領域にのみ第二の毛束群140が形成され、ヘッド部先端21からヘッド部基端まで長さに対して、50%以上100%以下の植毛領域にのみ第一の毛束32が植設されている。
尚、ヘッド部先端からヘッド部基端までの長さに対して、50%の植毛領域に、前記第二の毛束又は前記第一の毛束のいずれか一方、又は前記第二の毛束及び前記第一の毛束が植設されている。
本発明の第三の実施形態にかかる歯ブラシについて、以下に図3A及び図3Bを参照して説明する。
なお、第一の実施形態と同じ構成には同じ符号を付してその説明を省略し、主に第一の実施形態と異なる点について説明する。
図3A及び図3Bに示す歯ブラシ200は、植毛面20に、第一の毛束群230及びこれを囲む第二の毛束群240と、第一の毛束群232及びこれを囲む第二の毛束群242とを備えるものである。
また、第二の毛束群240が備えられた領域と、第二の毛束群242が備えられた領域との間には、第一の毛束32が4つ×1列で植設されている。
本発明の第四の実施形態にかかる歯ブラシについて、以下に図4A及び図4Bを参照して説明する。
なお、第一の実施形態と同じ構成には同じ符号を付してその説明を省略し、主に第一の実施形態と異なる点について説明する。
図4A及び図4Bに示す歯ブラシ300は、植毛面20に、第一の毛束群330及びこれを囲む第二の毛束群340と、第一の毛束群332及びこれを囲む第二の毛束群342とを備えるものである。
また第二の毛束群340が備えられた領域と、第二の毛束群342が備えられた領域との間には、第一の毛束32が4つ×2列で植設されている。
本発明の第五の実施形態にかかる歯ブラシについて、以下に図5A及び図5Bを参照して説明する。
なお、第一又は第四の実施形態と同じ構成には同じ符号を付してその説明を省略し、主に第一及び第四の実施形態と異なる点について説明する。
図5A及び図5Bに示す歯ブラシ400は、植毛面20に、第一の毛束群330及びこれを囲む第二の毛束群440と、第二の毛束群440の外側に、第二の毛束442よりも長い第三の毛束452とを備えるものである。
図5Bに示すように、第二の毛束群440の上端面は、ヘッド部先端21からヘッド部基端に向かい漸次植毛面に近づく傾斜面とされている。
第二の毛束群440が備えられた領域とヘッド部基端との間には、ヘッド部先端21から順に、第一の毛束32が4つ×1列、第三の毛束452が4つ×1列、第一の毛束32が4つ×1列、第三の毛束452が4つ×1列、第一の毛束32が3つ×1列で植設されている。
最もヘッド部基端寄りにおける第二の毛束群440の植毛面20上の高さ、即ち、第二の毛束442を構成する用毛の内、最もヘッド部基端寄りの用毛の長さT4は、長さT3よりも短いものである。なお、長さT4は、長さT1と同等以上が好ましく、長さT1より長いことがより好ましい。
第二の毛束442の毛束径は、第二の毛束42の毛束径R2と同様である。
第二の毛束442を構成する用毛の材質は、第二の毛束42を構成する用毛の材質と同様であり、第二の毛束442を構成する用毛の横断面形状は、第二の毛束42を構成する用毛の横断面形状と同様である。第二の毛束442を構成する用毛の太さは、第二の毛束42を構成する用毛と同様である。
[(第三の毛束の毛束の座屈強度)/(第二の毛束の座屈強度)]で表される座屈強度比は、歯ブラシ400に求める機能に応じて決定でき、例えば、0.4以上0.9以下が好ましく、0.5以上0.8以下がより好ましい。0.4未満であると、第三の毛束452の毛腰が柔らかすぎて、歯間部又は歯頸部を十分に清掃できないおそれがある。0.9超であると、第三の毛束452の毛腰が硬すぎて、歯間部又は歯頸部に進入しにくくなるおそれがある。
第三の毛束452を第二の毛束442よりも低い座屈強度とすることで、第三の毛束452が歯間部又は歯頸部により進入しやすくなるためである。
長さT5が長さT3よりも長いことで、第三の毛束452が歯間部又は歯頸部に進入しやすくなる。
[T5-T3]で表される毛長差D2は、例えば、0.2mm以上1.5mm以下が好ましい。0.2mm未満であると、第三の毛束452を植設した効果が得られにくく、1.5mm超であると、口腔内での操作性が損なわれるおそれがある。
本発明の第六の実施形態にかかる歯ブラシについて、以下に図6A及び図6Bを参照して説明する。
なお、第一、第四又は第五の実施形態と同じ構成には同じ符号を付してその説明を省略し、主に第一、第四及び第五の実施形態と異なる点について説明する。
図6A及び図6Bに示す歯ブラシ500は、植毛面20に、第一の毛束群330及びこれを囲む第二の毛束群440と、第二の毛束群440の外側に、第二の毛束442よりも長い第三の毛束452とを備えるものである。
本発明は、上述の実施形態に限定されるものではない。
第一~第四の実施形態では、第二の毛束群の外側に、第一の毛束のみが植設されているが、第二の毛束群の外側に植設される毛束は、第一の毛束に限定されない。ただし、第二の毛束群の開放部に隣接する毛束(例えば、第一の実施形態において、第二の毛束群が設けられた領域とヘッド部基端との間に植設された4つの第一の毛束)は、第二の毛束群を構成する第二の毛束と座屈強度が同等以下のものが好ましく、さらに同等以下の長さのものがより好ましい。第二の毛束群の開放部に隣接する毛束が、第二の毛束群を構成する第二の毛束よりも座屈強度が高いと、第一の毛束群を構成する第一の毛束が歯牙に当たりにくくなり、歯間部又は歯頸部の清掃が不十分になるおそれがある。
表1に記載の仕様に従い、図1A及び図1Bの歯ブラシ1と同様の歯ブラシを作製した。この歯ブラシは、ハンドル体がPET製とされたものである。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。なお、表中の「用毛種類」の欄の「テーパー」とは、テーパー毛を示し、「ストレート」とは、用毛の先端が丸められたストレート毛を示す(以降において同じ)。
図2A及び図2Bの歯ブラシ100と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
図3A及び図3Bの歯ブラシ200と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
図4A及び図4Bの歯ブラシ300と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
図5A及び図5Bの歯ブラシ400と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。なお、表中、第二の毛束の長さ「10.5-9」とは、図5A及び図5Bの長さT3が10.5mmで、長さT4が9mmであることを示す。また、第二の毛束の座屈強度(N)「2.4-2.7」とは、長さの異なる3種の第二の毛束の座屈強度が2.4N以上2.7N以下であることを示す(以降において同じ)。
図6A及び図6Bの歯ブラシ500と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
図7A及び図7Bに示す歯ブラシ900と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。歯ブラシ900は、歯ブラシ200(図3A及び図3B)における、第二の毛束群240が備えられた領域と、第二の毛束群242が備えられた領域との間に植設された4つの第一の毛束32を第二の毛束42に換えたものである。即ち、歯ブラシ900は、ヘッド部先端21方向及びヘッド部基端方向のいずれもが第二の毛束42により囲われたものである。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
図8A及び図8Bに示す歯ブラシ901と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。歯ブラシ901は、歯ブラシ1(図1A及び図1B)における、第二の毛束群40の内、最もヘッド部先端21寄りに植設された2つの第二の毛束42を第一の毛束32に換えたものである。即ち、歯ブラシ901は、ヘッド部先端21方向及びヘッド部基端方向を開放し、第一の毛束32を囲ったものである。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
図9A及び図9Bに示す歯ブラシ902と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。歯ブラシ902は、歯ブラシ1(図1A及び図1B)における、全ての第二の毛束42を第一の毛束32に換えたものである。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
図10A及び図10Bに示す歯ブラシ903と同様の歯ブラシとした以外は、実施例1と同様にして歯ブラシを得た。歯ブラシ903は、歯ブラシ1(図1A及び図1B)における、全ての第一の毛束32を第二の毛束42に換えたものである。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
図11A及び図11Bに示す歯ブラシ904と同様の歯ブラシとした以外は、実施例2と同様にして歯ブラシを得た。歯ブラシ904は、歯ブラシ100(図2A及び図2B)における、全ての第一の毛束32を第一の毛束932とし、全ての第二の毛束42を第一の毛束932よりも短い第二の毛束942としたものである。得られた歯ブラシについて、奥歯清掃力、歯間清掃力及び歯牙包括実感を評価し、その結果を表に示す。
<奥歯清掃力>
各例の歯ブラシを用いて、以下のモデル清掃力試験を実施した。まず、成人上顎模型(500AU、株式会社ニッシン製)の右側頬側第一大臼歯の歯面にモデル歯垢として赤色ペイント(サクラ白板マーカー #19 赤、株式会社サクラクレパス製)を塗布したものを用意した。モデル歯垢を形成した歯牙に対し、垂直に200gの荷重で歯ブラシを押し当てながら、ヘッド部先端とヘッド部基端とを結ぶ方向にストローク20mmで10回往復動して清掃した。清掃後、下記の方法により歯垢除去率を測定した。
清掃力試験前に第一大臼歯の歯面のモデル歯垢占有面積を画像解析により測定し、清掃力試験後に再度同部位のモデル歯垢占有面積を測定し、下記(1)式により歯垢除去率を算出した。算出した歯垢除去率を下記判断基準に分類し、奥歯清掃力を評価した。
A:70%以上
B:50%以上70%未満
C:30%以上50%未満
D:30%未満
右側頬側第一大臼歯と第二臼歯との歯間部に赤色ペイントを塗布した以外は、奥歯清掃力と同様にして、歯間清掃力を評価した。
10人のモニターが各例の歯ブラシを用いて口腔内を清掃し、その際の口腔内での感触を下記評価基準で評価した。モニター10人の平均点が4.0点以上を「A」、平均点3.0点以上4.0点未満を「B」、平均点2.0点以上3.0点未満を「C」、平均点2.0点未満を「D」とした。
5点:歯牙が1本ずつ包み込まれる感触を非常に感じる。
4点:歯牙が1本ずつ包み込まれる感触を強く感じる。
3点:歯牙が1本ずつ包み込まれる感触を感じる。
2点:歯牙が1本ずつ包み込まれる感触をあまり感じない。
1点:歯牙が1本ずつ包み込まれる感触を全く感じない。
一方、ヘッド部先端方向及びヘッド部基端方向のいずれもが第二の毛束で囲われた比較例1は、奥歯清掃力、歯間清掃力及び歯牙包括実感が「C」であった。また、ヘッド部先端方向及びヘッド部基端方向のいずれもが開放されている比較例2は、奥歯清掃力が「D」であった。
また、第一の毛束を第二の毛束よりも長いものとした比較例5は、歯牙包括実感が「D」であった。
これらの結果から、本発明を適用した歯ブラシは、歯間部、歯頸部並びに奥歯の咬合面及び歯面を良好に清掃できることが判った。
2 ヘッド部
3 ハンドル部
20植毛面
21ヘッド部先端
30、130、230、232、330、332第一の毛束群
32第一の毛束
40、140、240、242、340、342、440第二の毛束群
42、442第二の毛束
452第三の毛束
Claims (13)
- ヘッド部の植毛面に2以上の用毛を束ねてなる毛束が2以上植設された歯ブラシにおいて、
1以上の第一の毛束が植設されてなる第一の毛束群と、第二の毛束が、前記ヘッド部の先端方向又は基端方向を開放し前記第一の毛束群を囲んで植設されてなる第二の毛束群とを備え、
前記第一の毛束の長さは、前記第二の毛束の長さよりも短く、
前記第一の毛束の座屈強度は、前記第二の毛束の座屈強度より低いことを特徴とする歯ブラシ。 - 前記第一の毛束は、植毛面を起点として0mm以上5以下の位置から用毛の先端に向かい漸次その径が小さくなり、前記用毛の毛先が先鋭化された用毛を備えることを特徴とする、請求項1に記載の歯ブラシ。
- 前記第二の毛束群は、前記ヘッド部の先端寄りにのみ形成されていることを特徴とする、請求項1又は2に記載の歯ブラシ。
- 前記第二の毛束群の外側に、前記第二の毛束の長さより長い第三の毛束が植設され、前記第三の毛束は、植毛面を起点として0mm以上5以下の位置から用毛の先端に向かい漸次その径が小さくなり、前記用毛の毛先が先鋭化された用毛を備えることを特徴とする、請求項1~3のいずれか1項に記載の歯ブラシ。
- 前記第二の毛束は、毛先が先鋭化されていない用毛からなることを特徴とする、請求項1~4のいずれか1項に記載の歯ブラシ。
- 前記第二の毛束は、植毛面から毛先に向かいその径が同一であることを特徴とする請求項1~4のいずれか一項に記載の歯ブラシ。
- 前記第二の毛束は、用毛の先端が植毛面に平行な平面であることを特徴とする請求項1~4のいずれか一項に記載の歯ブラシ。
- 前記第二の毛束は、用毛の先端が半球状に丸められたものであることを特徴とする請求項1~4のいずれか一項に記載の歯ブラシ。
- 前記第二の毛束の長さと前記第一の毛束の長さとの毛長差は、0.3mm以上3mm以下であることを特徴とする、請求項1に記載の歯ブラシ。
- [(前記第一の毛束の座屈強度)/(前記第二の毛束の座屈強度)]で表される座屈強度比は、0.4以上0.9以下であることを特徴とする、請求項1に記載の歯ブラシ。
- 前記第三の毛束の長さと前記第二の毛束の長さとの毛長差は、0.2mm以上1.5mm以下であることを特徴とする、請求項4に記載の歯ブラシ。
- [(第三の毛束の毛束の座屈強度)/(第二の毛束の座屈強度)]で表される座屈強度比は、0.4以上0.9以下であることを特徴とする、請求項4に記載の歯ブラシ。
- ヘッド部先端からヘッド部基端までの長さに対して、0%を超えて50%以下の植毛領域に、前記第二の毛束群が植設されていることを特徴とする、請求項1~12のいずれか一項に記載の歯ブラシ。
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US10226118B2 (en) | 2014-12-23 | 2019-03-12 | Colgate-Palmolive Company | Oral care implement having multi-component handle |
US10687610B2 (en) | 2014-12-23 | 2020-06-23 | Colgate-Palmolive Company | Oral care implement |
US10835026B2 (en) | 2014-12-23 | 2020-11-17 | Colgate-Palmolive Company | Oral care implement |
US10743646B2 (en) | 2014-12-23 | 2020-08-18 | Colgate-Palmolive Company | Oral care implement |
US10426250B2 (en) | 2014-12-23 | 2019-10-01 | Colgate-Palmolive Company | Oral care implement |
US10455931B2 (en) | 2014-12-23 | 2019-10-29 | Colgate-Palmolive Company | Oral care implement |
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USD883676S1 (en) | 2014-12-23 | 2020-05-12 | Colgate-Palmolive Company | Oral care implement and portions thereof |
USD780457S1 (en) | 2014-12-23 | 2017-03-07 | Colgate-Palmolive Company | Oral care implement |
USD1004980S1 (en) | 2014-12-23 | 2023-11-21 | Colgate-Palmolive Company | Oral care implement |
US10021959B2 (en) | 2014-12-23 | 2018-07-17 | Colgate-Palmolive Company | Oral care implement having multi-component handle |
US10182644B2 (en) | 2014-12-23 | 2019-01-22 | Colgate-Palmolive Company | Oral care implement |
US11229281B2 (en) | 2014-12-23 | 2022-01-25 | Colgate-Palmolive Company | Oral care implement |
US11291293B2 (en) | 2014-12-23 | 2022-04-05 | Colgate-Palmolive Company | Oral care implement |
US11779102B2 (en) | 2014-12-23 | 2023-10-10 | Colgate-Palmolive Company | Oral care implement |
JP2018174989A (ja) * | 2017-04-03 | 2018-11-15 | サンスター株式会社 | 歯ブラシ |
US11517412B2 (en) | 2017-12-12 | 2022-12-06 | Colgate-Palmolive Company | Oral care implement |
US11833004B2 (en) | 2017-12-12 | 2023-12-05 | Colgate-Palmolive Company | Oral care implement and handle and refill head thereof |
USD997567S1 (en) | 2018-12-18 | 2023-09-05 | Colgate-Palmolive Company | Electric toothbrush |
USD960582S1 (en) | 2020-12-10 | 2022-08-16 | Colgate-Palmolive Company | Oral care refill head |
Also Published As
Publication number | Publication date |
---|---|
JP2012176084A (ja) | 2012-09-13 |
JP5948019B2 (ja) | 2016-07-06 |
CN103391730A (zh) | 2013-11-13 |
KR20140009292A (ko) | 2014-01-22 |
CN103391730B (zh) | 2015-11-25 |
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