WO2019230838A1 - 歯ブラシ - Google Patents

歯ブラシ Download PDF

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Publication number
WO2019230838A1
WO2019230838A1 PCT/JP2019/021391 JP2019021391W WO2019230838A1 WO 2019230838 A1 WO2019230838 A1 WO 2019230838A1 JP 2019021391 W JP2019021391 W JP 2019021391W WO 2019230838 A1 WO2019230838 A1 WO 2019230838A1
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WO
WIPO (PCT)
Prior art keywords
diameter
holes
flock
axis direction
hole
Prior art date
Application number
PCT/JP2019/021391
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English (en)
French (fr)
Japanese (ja)
Inventor
金丸　直史
真衣子 菊地
Original Assignee
ライオン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ライオン株式会社 filed Critical ライオン株式会社
Priority to CN201980036044.0A priority Critical patent/CN112203559B/zh
Priority to JP2020522268A priority patent/JP7382927B2/ja
Priority to KR1020207027263A priority patent/KR20210016326A/ko
Publication of WO2019230838A1 publication Critical patent/WO2019230838A1/ja

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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 on May 31, 2018 based on Japanese Patent Application No. 2018-105172 for which it applied to Japan, and uses the content for it here.
  • a toothbrush having a thin head part with a thickness of about 2 to 3 mm is known as a toothbrush that improves the operability of the toothbrush in the oral cavity and enhances the cleaning feeling of narrow parts such as the back teeth in the oral cavity (Patent Document 1).
  • a toothbrush that can gently massage the gums there is known a toothbrush in which a hair bundle having a diameter of 1.8 mm or more in which brushing pressure is easily dispersed is implanted in a flock hole by driving a flat wire (Patent Document 2).
  • a method of lengthening the flat wire can be considered, but if the flat wire driven into the thin head portion is lengthened, a crack is generated between the flat wires driven into adjacent flock holes in the head portion. Is likely to enter, and cracks and whitening are likely to occur in the head portion. The larger the diameter of the flocked hole, the greater the impact applied to the head part during flocking, so cracking and whitening are likely to occur.
  • the present invention suppresses the occurrence of cracking or whitening of the head portion even if the head portion is thin and excellent in intraoral operability and has a large-diameter hair bundle that is effective in improving massage feeling.
  • An object of the present invention is to provide a toothbrush that can sufficiently secure a fixing force of a bristle bundle by a flat wire.
  • a resin-made handle body including a head portion having a plurality of flocking holes provided on a flocking surface, and a flocking portion in which a bunch of hair is planted by driving a flat wire is provided in each flocking hole.
  • Toothbrush The head portion has a thickness of 2 mm or more and 4 mm or less,
  • the ratio of the total number of flock holes with a diameter of 1.8 mm or more to the total number of flock holes provided on the flocked surface is 10% or more,
  • Two or more large diameter flock holes are aligned in the long axis direction of the handle body,
  • At least one pair of the large-diameter flock holes adjacent in the long axis direction has a ratio of the stress generation parameter P 1 expressed by the following formula 1 to the long axis stress relaxation parameter P 2 expressed by the following formula 2 of 20 ⁇
  • a toothbrush that satisfies the condition of 30%.
  • S A is a front view, the the area of the circumscribed circle of the flat wire, which are discharged to the flocking holes of large diameter (mm 2) .
  • S B the large-diameter the .h an opening area (mm 2) of the bristle holes in, in side view, said from the flocked surface is a distance to the lower end of the flat wire, which are discharged to the flocking holes of large diameter (mm) .
  • S C is The area of the flocked surface surrounded by the respective opening edges of the large diameter flock holes adjacent in the major axis direction and the two tangents that are in contact with any of the adjacent large diameter flock holes and do not intersect ( mm 2 ), where D is the thickness (mm) of the head portion.
  • the stress generated parameter P 1 is 2.3-4.0, toothbrush according to [1].
  • At least one of the large-diameter flock holes satisfies a condition that a short-axis stress relaxation parameter P3 represented by the following formula 3 is 2.0 to 5.5 [1] or [2] Toothbrush as described in.
  • SD (S D ⁇ D) / d Equation 3
  • SD is a flocked surface surrounded by two tangent lines drawn in parallel to the short axis direction of the large diameter flocked hole and edges on both sides of the head portion in the short axis direction) a area (mm 2), wherein the area S D1 region i surrounded by two tangents and the opposite edges of the opening area of the region i and overlapping portions of all bristles holes in the area i a value sum minus the S D2 of .D is the thickness (mm) .d of the head portion, said a head portion of the width (mm).)
  • the large diameter flocked hole and a small diameter flocked hole having a diameter of less than 1.8 mm are formed, When a straight line parallel to the short axis direction passing through the center of the large diameter flock hole is drawn in front view for all the large diameter flock holes, a straight line of 50% or more with respect to
  • the toothbrush of the present invention suppresses the head portion from being cracked or whitened even if it has a thin-walled head and excellent buccal operability, and has a large-diameter hair bundle that is effective in improving massage feeling. However, the fixing force of the hair bundle by the flat wire is sufficiently secured.
  • FIG. 3 is a cross-sectional view of the toothbrush of FIG. 2 along AA. Note that the hair bundle and the flat line are omitted.
  • the hair bundle is omitted.
  • a cross-sectional view illustrating a stress generating parameters P 1 and the major axis the stress relaxation parameters P 2 is a B-B sectional view in FIG.
  • the hair bundle is omitted.
  • the hair bundle is omitted. It is a front view illustrating the short-axial stress relaxation parameter P 3. Note that the hair bundle and the flat line are omitted. It is sectional drawing which showed a mode that the hair
  • the toothbrush 1 of the present embodiment includes a resin handle body 1a as shown in FIGS.
  • the handle body 1a is formed by a head portion 10, a neck portion 12, and a handle portion 14.
  • the neck portion 12 extends to the rear end side in the long axis direction of the head portion 10.
  • the neck portion 12 is a portion that connects the handle portion 14 and the head portion 10.
  • the handle portion 14 extends to the rear end side of the neck portion 12 in the long axis direction.
  • the handle part 14 is a part that the user holds.
  • the handle body 1a may be one in which the head portion 10, the neck portion 12, and the handle portion 14 are integrally molded, or may be one in which any of them is separately molded and joined.
  • the rear end of the head portion is the most rear end side. It is a position of distance L1 from the rear end of the outer edge of the flocked hole to the rear end side in the long axis direction.
  • the head unit 10 has a flocked surface 10a on one side in the thickness direction.
  • a plurality of circular first flocking holes 11 a and second flocking holes 11 b are formed on the flocking surface 10 a of the head portion 10.
  • the head portion 10 of the toothbrush 1 is provided with a flocking portion 18. In the hair transplantation part 18, the 1st hair
  • the toothbrush of this invention is a toothbrush of a flat wire type
  • the thickness D (FIG. 3) of the head part 10 is 2 mm or more and 4 mm or less, and preferably 2.5 mm or more and 3.5 mm or less. If the thickness of the head unit 10 is equal to or less than the upper limit of the above range, the toothbrush 1 is excellent in the intraoral operability, and the cleaning feeling in a narrow place in the oral cavity such as the back teeth is high. If the thickness of the head portion 10 is equal to or greater than the lower limit of the above range, cracking and whitening of the head portion can be suppressed, and the hair bundle pull-out strength can be ensured.
  • the range of the thickness D of the head portion means that the thickness is within the range regardless of the position of the head portion.
  • the width d (FIG. 2) of the head portion 10 is preferably 6 to 16 mm, more preferably 8 to 15 mm, and still more preferably 10 to 12 mm. If the width of the head portion 10 is equal to or greater than the lower limit of the above range, even if a plurality of large-diameter flock holes are arranged in the short axis direction, it is easy to ensure a sufficient pitch of the flock holes. It is easy to suppress. Moreover, the arrangement
  • the range of the head portion width d means that the maximum width of the head portion is within the range.
  • a numerical range represented by “to” means a numerical range including numerical values before and after “as” as a lower limit value and an upper limit value.
  • the length of the head unit 10 is preferably 10 to 33 mm, more preferably 12 to 28 mm. If the length of the head portion 10 is equal to or greater than the lower limit of the above range, even if a plurality of large-diameter flock holes are arranged in the major axis direction, it is easy to ensure the distance between the holes and suppress cracking and whitening of the head portion. It's easy to do. Moreover, the arrangement
  • the plurality of flocked holes formed on the flocked surface of the head portion may be a single flocked hole or a combination of flocked holes having different diameters.
  • the hair bundle having a small diameter responsible for the cleaning effect on the inner side in the minor axis direction.
  • the short axis direction is a direction parallel to the flocked surface and perpendicular to the long axis direction.
  • the arrangement pattern of the flock holes is not particularly limited, and examples thereof include a staggered pattern and a lattice pattern.
  • Each flocked hole is formed in the head portion of the toothbrush of the present invention so that two or more large flocked holes having a diameter of 1.8 mm or more are arranged in the longitudinal direction of the handle body.
  • "Flocked holes are arranged in the long axis direction” means that two tangent lines parallel to the long axis direction are drawn so as to contact both sides of the short flocked direction of any flocked hole in a front view of the head portion.
  • it means a state in which another flocking hole is formed so that at least a part thereof overlaps a region sandwiched between the two tangents.
  • the mode in which the flock holes are arranged in the major axis direction is not limited to the mode in which the flock holes are arranged in a straight line so that the center of another flock hole is located on a straight line passing through the center of any flock hole in the long axis direction. Also included is an aspect in which another flocked hole is formed side by side so that the center is located at a position shifted from a straight line parallel to the major axis direction passing through the center of any flocked hole and a part of the flocked hole overlaps the region It is.
  • it means a state in which another flocking hole is formed so as to at least partially overlap a region sandwiched between the two tangents.
  • five first flocked holes 11a having a large diameter of 1.8 mm or more arranged in the major axis direction are provided on both sides of the flocked surface 10a of the head portion 10 in the minor axis direction. It is formed one by one.
  • a total of 17 second flocked holes 11b having a small diameter of less than 1.8 mm arranged in three rows in the long axis direction are formed in the central portion inside the first flocked hole 11a in the short axis direction of the flocked surface 10a. Yes.
  • the small diameter second flocking holes 11b are formed in a staggered pattern.
  • a large diameter flocking hole having a diameter of 1.8 mm or more is arranged in the major axis direction along the side edge of the head part outside the short axis direction of the flocked surface of the head part, and the large diameter flocking hole It is preferable to arrange so that the flock hole in the center part is sandwiched between.
  • the small-diameter second flocking holes 11 b at the center are sandwiched by two rows of large-diameter first flocking holes 11 a formed in the major axis direction along the side edge of the head portion 10.
  • the small-diameter flock hole at the center may be sandwiched between a pair of large-diameter flock holes, or may be sandwiched between two rows of large-diameter flock holes.
  • a plurality of large-diameter flock holes are formed in the central portion in the short axis direction of the flocked surface of the head portion, and small-diameter flock holes are formed on both sides in the short axis direction of these large-diameter flock holes. May be.
  • the large-diameter first flocking hole 11 a and the small-diameter second flocking hole 11 b arranged in the short axis direction of the head portion 10 are the center of the first flocking hole 11 a and the center of the second flocking hole 11 b. It is formed so as not to exist on the same straight line parallel to the minor axis direction.
  • the center of the large-diameter flock hole and the center of the small-diameter flock hole are in the minor axis direction as in this example. It is preferable not to exist on the same parallel straight line. That is, even when the large diameter flocked hole and the small diameter flocked hole are arranged in the short axis direction, it is preferable that the center of the large diameter flocked hole and the center of the small diameter flocked hole are formed so as to be shifted in the short axis direction. . Thereby, even if a plurality of large-diameter flock holes and small-diameter flock holes are formed in the short axis direction, the pitch of the flock holes is easily secured, so that the head portion is not easily cracked.
  • the large-diameter flock holes do not exist on the same straight line with the center of each flock hole parallel to the short axis direction. It is preferable to do so.
  • the small-diameter flock holes should not be located on the same straight line whose center is parallel to the short axis direction. It is preferable to do.
  • all the flock holes arranged in the short axis direction of the head portion are formed so as to be shifted from each other so that the center of another flock hole does not exist on a straight line passing through the center of any flock hole. preferable.
  • the diameter of the first flocked hole 11a having a large diameter of 1.8 mm or more is preferably 1.8 to 3.2 mm, and more preferably 2.0 to 2.5 mm. If the diameter of the 1st flock hole 11a is more than the lower limit of the said range, the massage actual feeling of a gum will improve. If the diameter of the first flock hole 11a is equal to or less than the upper limit of the above range, it is possible to suppress the hair bundle folded portion under the flat line from becoming thick when the follicle is implanted, Since it becomes possible to drive deeply in the direction, it is easy to ensure the hair bundle pull-out strength and single hair pull-out strength, and it is easy to suppress cracking and whitening of the head portion. It is preferable that the diameters of the large diameter flock holes arranged in the major axis direction are the same.
  • the diameter of the second flocked hole 11b having a small diameter of less than 1.8 mm is preferably 1.0 to 1.7 mm, and more preferably 1.2 to 1.5 mm. If the diameter of the 2nd flock hole 11b is more than the lower limit of the said range, the rigidity of the hair
  • the diameters of the small diameter flock holes arranged in the major axis direction are preferably the same.
  • the diameter of the flocked hole is the diameter when the shape of the flocked hole in the front view is circular, and the circumscribed circle of the flocked hole in the front view when the shape of the flocked hole in the front view is other than circular. Is the diameter.
  • the ratio of the total number of large diameter flock holes having a diameter of 1.8 mm or more to the total number of flock holes provided on the flocked surface (hereinafter also referred to as “ratio Q 1 ”) is set to 10% or more.
  • the ratio Q 1 represents a 34%.
  • the upper limit of the ratio Q 1 represents a 100%.
  • the lower limit of the ratio Q 1 is 10% or more, preferably 20% or more, more preferably 30% or more.
  • the upper limit of the ratio Q 1 is 100%, preferably 80% or less, more preferably 50% or less, more preferably 40% or less.
  • the ratio Q 1 is preferably 10 to 80%, more preferably 20 to 50%, still more preferably 30 to 40%. Thereby, both the massage feeling of gums and the plaque cleaning can be achieved.
  • the ratio of the total number of flocked holes having a diameter of 2.0 mm or more to the total number of flocked holes provided on the flocked surface is preferably 10% or more.
  • the ratio of the total number is more preferably 20% or more, and the ratio of the total number of flock holes having a diameter of 2.0 mm or more is further preferably 30% or more.
  • At least one set of large-diameter flock holes adjacent in the long axis direction is a long axis stress relaxation parameter P represented by the following formula 2 of the stress generation parameter P 1 represented by the following formula 1.
  • P 1 (S A ⁇ S B ) ⁇ h Equation 1
  • P 2 S C ⁇ D Formula 2
  • S A is a front view, the area of the circumscribed circle of the flat wire, which are discharged to the flocking holes of large diameter (mm 2).
  • S B is the opening area (mm 2 ) of the large diameter flocked hole.
  • h is the distance (mm) from the flocked surface to the lower end of the flat wire driven into the large diameter flocked hole in a side view.
  • S C the area of the flocked surface surrounded by each of the opening edge of flocking holes of large diameter adjacent the long axis direction but also in contact with any of the flocked holes of large diameter adjacent, and the two tangents that do not intersect (Mm 2 ).
  • D is the thickness (mm) of the head portion.
  • the opening area of the first planting pores 11a having a large diameter and S B. Surrounded by each opening edge of the large diameter first flocking hole 11a adjacent in the major axis direction and two tangent lines k1 and k2 that are in contact with any of the adjacent large diameter first flocking holes 11a and do not intersect.
  • the distance (mm) from the flocked surface 10a to the lower end of the flat wire 20 driven into the large diameter first flocked hole 11a in the side view of the head portion 10 is defined as h.
  • the first flock holes 11a having two large diameters adjacent to each other in the major axis direction are arranged in a state where their centers are not arranged on a straight line parallel to the major axis direction. Then, S A , S B and h are the same as in the above case.
  • each of the opening edges of the large-diameter first flocking holes 11 a adjacent in the major axis direction and the adjacent large-diameter first flocking holes 11 a are in contact with each other and do not intersect with each other.
  • At least one set satisfies the condition I among all combinations of large-diameter flock holes adjacent in the major axis direction. All combinations of large diameter flock holes adjacent in the long axis direction may satisfy the condition I, and combinations that satisfy the condition I and combinations that do not satisfy the condition I may be mixed.
  • the ratio of the number of combinations of large diameter flock holes adjacent so as to satisfy Condition I to the total number of all combinations of large diameter flock holes adjacent in the longitudinal direction is preferably 30% or more, 50% The above is more preferable, and 80% or more is more preferable. If the ratio is equal to or greater than the lower limit value, it is easy to obtain an effect of suppressing cracking of the head portion while maintaining the flocking strength and the hair removal strength even under the conditions of a thin head using a large diameter flocked hole. .
  • the stress generation parameter P 1 is preferably 2.3 to 4.0, and more preferably 2.4 to 3.7. If the stress generated parameter P 1 is lower than the lower limit value of the range, multiplied allowance of Tairasen becomes sufficiently large, easily sufficient flocking strength and hair loss intensity is ensured. If the stress generated parameter P 1 is more than the upper limit of the range, or too long hanging margin of Tairasen, possible to suppress the impact of driving is too large, in the axial direction of the head portion in the thin It is easy to suppress the occurrence of cracks.
  • Long axial stress relaxation parameter P 2 is preferably 6-17, more preferably 6 to 14, 7 to 11 is more preferred. If the long-axial stress relaxation parameter P 2 is more than the lower limit of the range, the impact at the time of implantation Tairasen is easily sufficiently relaxed, that cracks or whitening on the head portion in the thin occurs is suppressed. If the long-axial stress relaxation parameter P 2 is more than the upper limit of the range, not too wide spacing of planting pores, hardly occurs Utoke feeling, sufficient cleaning power and massage feeling is easily obtained.
  • H is preferably 1.1 to 1.8 mm, more preferably 1.3 to 1.7 mm.
  • h is preferably equal to a value obtained by subtracting the radius of the flocked hole from the depth of the flocked hole.
  • At least one of the large-diameter flock holes has a condition that the short-axis stress relaxation parameter P3 represented by the following formula 3 is 2.0 to 5.5 (hereinafter referred to as “condition II”). It is also preferable that the above is satisfied.
  • P 3 (S D ⁇ D) / d Equation 3
  • SD is the area (mm) of the flocked surface surrounded by two tangents drawn parallel to the short axis direction in the large diameter flock hole and the edges on both sides in the short axis direction of the head part. 2 )
  • the total of the opening areas S D2 of the portions that overlap the region i of all the flock holes in the region i from the area S D1 of the region i surrounded by the two tangents and the edges on both sides Is the value obtained by subtracting.
  • D is the thickness of the head portion.
  • d is the width of the head portion.
  • d is the edge between the minor axis direction of the head portion in the direction of the minor axis of a straight line passing through the center of the bristle holes to be calculated P 3 as viewed from the front Distance.
  • SD can be calculated as follows.
  • S D is calculated by subtracting S D2 from S D1 .
  • At least one of the large-diameter flock holes satisfies the condition II.
  • All of the large diameter flock holes may satisfy the condition II, or a large diameter flock hole that satisfies the condition II and a large diameter flock hole that does not satisfy the condition II may be mixed.
  • the total number of the ratio of the pattern S D satisfying the condition II it is preferably at least 30%, more preferably 50% or more, more preferably 80% or more. If the said ratio is more than the said lower limit, it will become easy to obtain sufficient cleaning power and a massage feeling, suppressing the crack of a short axis direction.
  • Minor axial stress relaxation parameter P 3 is preferably 2.0-5.5, more preferably 3.0-5.0, more preferably 3.5-4.5. In general since the time of brushing the toothbrush flex head portion axial direction, but cracks in the minor axis direction tends to easily occur, if the minor axis stress relaxation parameter P 3 is more than the lower limit of the range, the minor axis It is easy to suppress cracks in the direction. If the minor axis stress relaxation parameter P 3 is more than the upper limit of the above range, not too wide spacing of planting pores, hardly occurs Utoke feeling, sufficient cleaning power and massage feeling is easily obtained.
  • toothbrush 1 of this example when straight lines parallel to the minor axis direction passing through the center of the large-diameter first flocking hole 11a are drawn in front view for all large-diameter first flocking holes 11a, those straight lines are drawn. A straight line of 50% or more with respect to the total number of hairs is a straight line that does not pass through the center of the small diameter second flocking hole 11b.
  • the large-diameter flock hole is shown in front view with respect to all the large-diameter flock holes as in this example.
  • the head portion When a large-diameter flock hole is provided, the head portion is more likely to crack in the minor axis direction than when a small-diameter flock hole is provided. Also, when a large diameter flock hole is combined with a small diameter flock hole, the number of holes tends to be larger than when only a large diameter flock hole is used. Since there is a difference in the stress applied to the small diameter flocking hole adjacent to, distortion tends to occur. Therefore, when a large-diameter flock hole and a small-diameter flock hole are combined, the head portion tends to be more easily broken.
  • the large diameter flocking hole and the small diameter flocking hole are shifted in the minor axis direction so that a straight line of 50% or more with respect to the total number of the straight lines is a straight line that does not pass through the center of the small diameter flocking hole.
  • the ratio is more preferably 70% or more, and still more preferably 90% or more.
  • the total length of the handle body 1a can be appropriately determined in consideration of operability and the like, and is, for example, about 100 to 200 mm.
  • a resin having a flexural modulus (JIS K7171) of 1500 MPa or more is preferable.
  • the flexural modulus of the resin used as the material of the handle body 1a is more preferably 1500 MPa or more and 3000 MPa or less, and further preferably 2000 MPa or more and 2700 MPa or less. If the flexural modulus of the resin is equal to or greater than the lower limit, warping of the head portion 10 is likely to be suppressed. If the flexural modulus of the resin is equal to or less than the upper limit value, the neck portion 12 at the time of brushing is appropriately bent, so that the gum feel is improved. Further, the followability of the hair tips to the dentition can be improved, and the tooth brushing can be efficiently performed.
  • Examples of preferable resin used as the material of the handle body 1a include polypropylene (PP), polyacetal (POM), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), and polycyclohexylenedimethylene terephthalate (PCT).
  • POM is particularly preferable.
  • the resin used as the material of the handle body 1a may be one type or two or more types.
  • the handle body may be partially or wholly coated with a flexible resin such as an elastomer in order to improve gripping properties.
  • the flexible resin is preferably an olefin-based elastomer if the handle body is made of PP, and a styrene-based elastomer is preferable if it is POM, from the viewpoint of improving adhesiveness.
  • the material of the hair is not particularly limited, but polyamide (6-12 nylon, 6-10 nylon, 12-nylon etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate etc.), polyolefin (polypropylene etc.) ), Synthetic resin materials such as elastomers (olefin-based, styrene-based, etc.) and natural materials.
  • the material of the hair 15 may be one type or two or more types.
  • the cross-sectional shape of the hair is often a circle, but is not limited to a circle, and may be a triangle, a rectangle, a hexagon, a petal, or a combination of these.
  • the external appearance shape of the entire hair is not particularly limited, and those processed into a wave shape, a twist shape, a jagged shape or the like can also be used.
  • the diameter of the hair is preferably 3 to 12 mil (0.076 to 0.305 mm), more preferably 5 to 10 mil (0.127 to 0.254 mm). It is preferable to plant hairs having a small diameter in the large-diameter flock holes. Thereby, even if it is a thick hair
  • the diameter of the hair is the diameter when the cross-sectional shape of the hair is circular, and the diameter of the circumscribed circle of the cross-section of the hair when the cross-sectional shape of the hair is other than circular.
  • the bristles may be normal bristles having substantially the same diameter in one bristles except for the rounded ends.
  • you may be the taper hair which was the said thickness in the hair-planting surface 10a vicinity of the head part 10, and was sharpened so that a diameter may become thin gradually toward heading. In this case, the penetration of the tip of the hair into the gap between the teeth is good, and a soft contact feeling can be realized, so that it is suitable for cleaning the neck and the gums.
  • normal hair and taper hair can be suitably selected for each flocked hole, can be mixed in the same hair bundle, or can be freely combined.
  • the length (hair length) of the hair from the flocked surface 10a can be set as appropriate, and is, for example, about 6 to 15 mm.
  • the hair length is preferably 9 to 15 mm for adults and 6 to 9 mm for children. What is necessary is just to set the diameter of the 1st hair
  • the thickness of the head part is 2 mm or more and 4 mm or less, the intraoral operability is excellent and the cleaning feeling of the back teeth and the like is high. Further, since the ratio to Q 1 flocking holes diameter of at least 1.8mm is 10% or more, such as gum massage feeling is increased, various effects due to the tufts of the large diameter is flocked obtained.
  • the toothbrush of the present invention is not limited to the toothbrush 1 described above.
  • the number of hair bundles implanted on the flocked surface of the head portion and the arrangement pattern of the flocked holes are not limited to those of the toothbrush 1.
  • the number of bristle bundles and the arrangement pattern of the flock holes in the toothbrush of the present invention may be as in the toothbrushes 1A to 1G illustrated in FIGS.
  • the toothbrush 1H according to the present invention has a small-diameter second flocking hole 11b arranged on the outer side in the short axis direction, and a large-diameter first flocking hole 11a arranged on the inner side in the short-axis direction. It may be.
  • Example 1 Using POM (flexural modulus: 2500 MPa) as the resin for forming the handle body, the handle body 1a illustrated in FIGS. 1 to 8 was manufactured by injection molding according to the specifications shown in Tables 1 and 2.
  • the hair bundle made by Toray Monofilament's hair (diameter: 5.0 mils for large holes, 6.0 mils for small holes) is folded in half, and the flat wire sandwiched between them is put into the flock holes of the head according to the specifications shown in Table 2.
  • a toothbrush was made by implanting and planting hair bundles.
  • Examples 2 to 4 Comparative Examples 1 to 4
  • a toothbrush was prepared in the same manner as in Example 1 except that the specifications of the flock holes and the flat wires were changed as shown in Tables 1 and 2.
  • Tables 1 and 2 show the specifications of the toothbrushes in each example, and Table 3 shows the evaluation results.
  • the specification of the flock hole and the flat wire in Examples 1, 2, and 4 and Comparative Examples 1 and 2 in Table 2 shows only the flock hole having a large diameter.
  • the P 1, P 2 and Q 2 columns of Comparative Examples 3 and 4 in Table 2 showed a value calculated with respect to the small diameter of the flocking holes instead of flocking holes of large diameter.
  • the thickness of the head portion, the toothbrush of the ratio Q 1 and Examples 1-4 the percentage Q 2 is controlled to the range defined in the present invention, cracking and whitening of the head portion is suppressed In addition, sufficient flocking strength was secured. In addition, the back teeth were easy to clean, the feeling of removing plaque was high, and the feeling of gum massage was high. Rate Q 2 is high, the stress generated parameter P 1 is low Comparative Examples 3 and 4, increases the risk of cracking or whitening of the head portion, tufts omission strength tended to decrease. Moreover, in the toothbrushes of Comparative Examples 3 and 4 having no large flock hole with a diameter of 1.8 mm or more, the actual feeling of massage on the gums was insufficient as compared with the Examples. In Comparative Examples 1 and 2 in which the thickness of the head part is too thick, the back teeth were difficult to clean compared to the example.

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PCT/JP2019/021391 2018-05-31 2019-05-29 歯ブラシ WO2019230838A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001314231A (ja) * 2000-05-08 2001-11-13 Lion Corp 歯ブラシ
JP2012034844A (ja) * 2010-08-06 2012-02-23 Lion Corp 歯ブラシ
JP2016063912A (ja) * 2014-09-24 2016-04-28 サンスター株式会社 歯ブラシ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4738603B2 (ja) * 2000-11-06 2011-08-03 ライオン株式会社 歯ブラシ
JP5427486B2 (ja) 2009-06-24 2014-02-26 ライオン株式会社 歯ブラシ
JP6598352B2 (ja) * 2015-03-31 2019-10-30 ライオン株式会社 歯ブラシ
MY189446A (en) * 2015-07-24 2022-02-14 Lion Corp Toothbrush
CN108778049B (zh) * 2016-03-09 2020-03-24 狮王株式会社 牙刷

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001314231A (ja) * 2000-05-08 2001-11-13 Lion Corp 歯ブラシ
JP2012034844A (ja) * 2010-08-06 2012-02-23 Lion Corp 歯ブラシ
JP2016063912A (ja) * 2014-09-24 2016-04-28 サンスター株式会社 歯ブラシ

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TW202002846A (zh) 2020-01-16
JP7382927B2 (ja) 2023-11-17
CN112203559A (zh) 2021-01-08
JPWO2019230838A1 (ja) 2021-06-24
CN112203559B (zh) 2023-01-06
KR20210016326A (ko) 2021-02-15
TWI818028B (zh) 2023-10-11

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