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WO2019054266A1 - 歯ブラシ - Google Patents

歯ブラシ Download PDF

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Publication number
WO2019054266A1
WO2019054266A1 PCT/JP2018/033018 JP2018033018W WO2019054266A1 WO 2019054266 A1 WO2019054266 A1 WO 2019054266A1 JP 2018033018 W JP2018033018 W JP 2018033018W WO 2019054266 A1 WO2019054266 A1 WO 2019054266A1
Authority
WO
WIPO (PCT)
Prior art keywords
view
neck portion
thickness
handle
toothbrush
Prior art date
Application number
PCT/JP2018/033018
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
洋子 明間
奥田　靖
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 SG11202002225WA priority Critical patent/SG11202002225WA/en
Priority to JP2019542017A priority patent/JP7557938B2/ja
Priority to CN201880059583.1A priority patent/CN111093430B/zh
Priority to KR1020207007323A priority patent/KR102697852B1/ko
Publication of WO2019054266A1 publication Critical patent/WO2019054266A1/ja

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand
    • A46B5/023—Grips or handles specially adapted for children
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • 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.
  • Priority is claimed on Japanese Patent Application No. 2017-175906, filed September 13, 2017, the content of which is incorporated herein by reference.
  • Patent Document 1 describes a toothbrush in which the head portion is thinned and the operability in the oral cavity is excellent.
  • Patent No. 3387591 gazette
  • toothbrushes it is firstly required that children unaccustomed to brushing can safely and safely brush along with plaque removal effects.
  • technical development of toothbrushes for children aiming to improve the operability of toothbrushes in the oral cavity has not progressed like toothbrushes for adults.
  • the present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a toothbrush capable of obtaining good operability in the mouth of a child.
  • the toothbrush according to the present invention includes a flocked portion comprising a plurality of hair bundles, a head portion provided with the flocked portion on the flocked surface, a neck portion, and a handle portion, and in a front view
  • the length of the neck portion is 15 mm or more and 35 mm or less
  • the total length of the head portion and the neck portion is 28 mm or more and 68 mm or less
  • the width of the neck portion is 4 mm or more and 6 mm or less
  • the head portion has a thickness of 2 mm or more and 4 mm or less in a side view, and moves 20 mm toward the handle portion from a first position located at the boundary between the neck portion and the head portion in a front view
  • the distance between the two positions and the position of the ridge line of the finger rest is 4 mm or more and 22 mm or less
  • the difference between the second position and the position of the ridge line of the finger rest in the side view is 3 m or more, and 9mm or less.
  • the relationship between the width of the neck in the front view and the thickness of the neck in the side view is toward the rear end in the section from the first position to the second position
  • the thickness change amount may be equal to or greater than the width.
  • the magnitude relation between the width and the thickness of the neck portion may be reversed from the first position to the second position.
  • the surface on the flocked surface side of the neck portion is a first point at the center of the thickness of the tip of the head portion in the side view, and the longitudinal center of the handle portion in the front view In the position, it may be configured to be linear along a straight line connecting the second point which is the center of the thickness in the side view.
  • the surface on the flocked surface side of the neck portion is a first point at the center of the thickness of the tip of the head portion in the side view and the rear end of the handle portion in the side view It is good also as composition constituted linear form along the straight line which connected with the 3rd point which becomes the center of thickness.
  • the handle body is convex toward the neck portion of the handle portion, the first finger rest being convex toward the flocked surface, and convex toward the back surface opposite to the flocked surface.
  • a second finger rest portion, and the first finger rest portion has a first curved surface having a center of curvature on the neck portion side on the flocked surface side in the side view, and the first finger rest portion on the flocked surface side
  • a second curved surface having a center of curvature on the handle portion side is formed at a crossing point, and the second finger rest portion has a center of curvature on the neck portion side on the flocked surface side in the side view. It is good also as composition formed in a portion which 4 curved surfaces and the 5th curved surface which has a curvature center in the above-mentioned handle part side by the side of the back intersect.
  • the first finger rest portion in the front view, is convex with a first ridge line formed at an intersection of the first curved surface and the second curved surface toward the neck portion.
  • the second ridgeline formed at the intersection of the fourth curved surface and the fifth curved surface faces the neck portion side. It may be configured to have a convexly curved shape.
  • the width in the longitudinal direction of the neck portion may be constant in the front view.
  • the handle body may be made of a polypropylene resin.
  • the handle body may be coated with a soft resin.
  • the total length of the handle may be 110 mm or more and 170 mm or less.
  • BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the whole structure of the toothbrush 1 of this embodiment.
  • BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows the whole structure of the toothbrush 1 of this embodiment.
  • BRIEF DESCRIPTION OF THE DRAWINGS The side view which shows the whole structure of the toothbrush 1 of this embodiment. The side view which expands and shows the principal part of FIG. 3A. The rear view showing the whole composition of toothbrush 1 of this embodiment.
  • FIG. 1 is a perspective view showing the entire configuration of the toothbrush 1 of the present embodiment.
  • FIG. 2 is a front view of the plain view which shows the whole structure of the toothbrush 1 of this embodiment.
  • FIG. 3A and FIG. 3B are side views of the side view showing the entire configuration of the toothbrush 1 of the present embodiment.
  • FIG. 4 is a rear view of the rear view showing the entire configuration of the toothbrush 1 of the present embodiment.
  • the upper surface of the head portion 2 provided with the flocked portion 11 is referred to as a flocked surface 2 a. As shown in FIG.
  • a virtual plane K forming the flocked surface 2a is a horizontal XY plane, a direction in which the handle body 5 extends as a whole is an X axis direction, and a direction orthogonal to the X axis is a Y axis direction.
  • the normal direction of the flocked surface 2a is taken as the Z-axis direction.
  • the dimension in the Y-axis direction of each member is referred to as the width of the member
  • the dimension in the Z-axis direction of each member is referred to as the thickness of the member
  • the dimension in the X-axis direction of each member is the length of the member It is called.
  • FIG. 2 is a view of the flocked surface 2 a side of the toothbrush 1 viewed from the + Z-axis direction.
  • the “side view” in FIGS. 3A and 3B is a view of the toothbrush 1 as viewed from the ⁇ Y axis direction.
  • the “rear view” in FIG. 4 is a view of the toothbrush 1 as viewed from the -Z direction on the back surface 2b opposite to the flocked surface 2a.
  • the toothbrush 1 As shown in FIG. 1, the toothbrush 1 according to the present embodiment includes a hair-implanted portion 11, a head portion 2 provided with the hair-implanted portion 11, a neck portion 3 extended from the proximal end side of the head portion 2, and a neck And a handle portion 4 extended from the proximal end side of the portion 3. That is, the head portion 2, the neck portion 3 and the handle portion 4 are integrally formed.
  • a portion where the head portion 2, the neck portion 3 and the handle portion 4 are integrated will be referred to as a handle body 5.
  • the handle body 5 is integrally formed in a long shape as a whole, and can be produced, for example, by injection molding using a resin as a material.
  • a resin as a material of the handle body 5
  • polypropylene (PP) polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexylene dimethylene terephthalate (PCT), polyacetal (POM), polyethylene naphthalate (PEN), polystyrene ( PS), acrylonitrile butadiene styrene resin (ABS), cellulose propionate (CP), polyarylate, polycarbonate, acrylonitrile styrene copolymer resin (AS) and the like.
  • a material such as POM, PBT, or PEN from the viewpoint of high strength and easy thinning of the head portion.
  • polypropylene has properties of high versatility and ease of processing and low cost, but low flexural modulus, as compared with resins such as polyacetal.
  • the flexural modulus (JIS K7171) of polyacetal is approximately 2500 MPa
  • the flexural modulus of polypropylene is approximately 1500 to 2000 MPa. Therefore, conventionally, polypropylene was a difficult material to use as a toothbrush material having a thin head and a narrow neck.
  • a resin having a relatively low flexural modulus such as polypropylene can also be used.
  • the flexural modulus (JIS K 7171) of the constituent material of the handle body 5, particularly the neck portion 3 is preferably 1000 MPa or more and 2800 MPa or less, more preferably 1200 MPa or more and 2500 MPa or less, 1500 MPa More preferably, the pressure is 2000 MPa or less.
  • One of the above resins may be used alone, or two or more resins may be used in combination.
  • one part or all part of the handle part 4 may be coat
  • the soft resin for example, a resin of preferably Shore A 90 or less, more preferably a resin of Shore A 10 to 40 can be mentioned.
  • an elastomer resin such as a polyolefin-based elastomer, a styrene-based elastomer, a polyester-based elastomer, a polyurethane-based thermoplastic elastomer, silicone, etc.
  • a flexible resin such as an elastomer
  • a polyolefin is preferable, and polypropylene is more preferable, from the viewpoint of enhancing adhesion.
  • the toothbrush 1 of the present embodiment is configured on the assumption of a toothbrush used by, for example, a child of 3 to 9 years old.
  • the entire length L5 of the handle body 5 can be determined in consideration of the operability and the like of the user.
  • the entire length L5 of the handle body 5 is, for example, about 110 mm to 170 mm.
  • the head portion 2 has a flat plate portion 2A having a flocked surface 2a and a back surface 2b parallel to each other in the thickness direction, and an extending portion 2B extending from one end side of the flat portion 2A.
  • the head portion 2 is in the form of a flat plate whose longitudinal direction of the handle body 5 is longitudinal and whose top portion is cut by a curve in a front view.
  • a plurality of flocked holes 2 h are formed in the flocked surface 2 a of the head portion 2.
  • the hair bundle 7 (FIG. 1) in which the use hairs are bundled is implanted in the flocking hole 2h to form a hair-implanted portion 11 (FIG. 1) composed of a plurality of hair bundles.
  • the head portion 2 spreads outward in the width direction from the tip of the head portion 2 toward the neck portion 3 in front view, and then extends with an equal width and then narrows inward in the width direction. It has a shape reaching the first position S1).
  • the length (head length) L2 shown in FIG. 2 indicates the length from the tip of the head portion 2 to the first position S1, which is the boundary with the neck portion 3.
  • the first position S1 is an end point of a curve forming a cornering from the neck portion 3 in the front view shape of the head portion 2, that is, a position where the bending direction of the curve forming the cornering changes. is there. That is, the first position S1 which is the boundary between the head portion 2 and the neck portion 3 is a curve or a straight line forming both edges where the width of the corner cut portion near the neck portion 3 in the head portion 2 in front view is narrowed It is a curve or a straight line whose width widens, or a position where the widths change in the same straight line. Further, in the case of a toothbrush in which the width becomes wider as the neck portion 3 moves toward the handle portion 4 in a front view, the first position S1 coincides with the smallest position in the head portion 2 and the neck portion 3 in a front view.
  • the dimensions of the head portion 2 are determined in consideration of characteristics such as intraoral operability. If the length L2 of the head part 2 is too long, the operability in the oral cavity is easily impaired, and if it is too short, the number of hair bundles 7 (FIG. 1) to be implanted is too small and the cleaning effect tends to be impaired . Therefore, the length L2 of the head portion 2 is preferably, for example, 13 mm to 35 mm.
  • illustration of the hair-implanted part 11 is abbreviate
  • the width W2 of the head portion 2 is preferably 5 mm to 13 mm, for example.
  • the thickness T2 of the head portion 2 can be determined in consideration of the constituent material of the handle 5, the bending elastic modulus, and the like.
  • the thickness T2 of the head portion 2 is preferably 2.0 mm or more and 4.0 mm or less, and more preferably 2.5 mm or more and 3.5 mm or less.
  • the shape of the flocking holes 2 h is not particularly limited, and may be a circle such as a perfect circle or an ellipse, or a polygon such as a triangle or a square.
  • the number of flocking holes 2h is not particularly limited, and is preferably, for example, about 10 to 60.
  • the most distal row is two holes aligned in the width direction
  • the second row from the tip side is three holes
  • the most rear row is also three holes.
  • three rows of four holes are formed side by side.
  • the diameter of the flocking holes 2h is determined according to the thickness of the hair bundle 7 shown in FIG. 1, and is preferably, for example, 1 mm to 3 mm.
  • the arrangement pattern of the flocking holes 2h is not particularly limited, and may be any arrangement pattern such as so-called lattice, zigzag or the like.
  • the material of the hair is, for example, polyamide such as 6-12 nylon, 6-10 nylon, etc., polyester such as PET, PBT, polytrimethylene terephthalate (PTT), PEN, polybutylene naphthalate (PBN), polyolefin such as PP Synthetic resin materials such as olefin elastomers and styrene elastomers can be used. These resin materials may be used alone or in combination of two or more.
  • the bristles may have a multi-core structure having a core and at least one or more layers of sheaths provided on the outer side of the core.
  • the cross-sectional contour of the bristles is not particularly limited, and, for example, a circle such as a perfect circle or an oval, a polygon such as a triangle, a quadrangle, a pentagon or a hexagon, a star, a clover of three leaves, a clover of four leaves Etc.
  • the tufts may be composed entirely of bristles of the same thickness, or bristles of two or more different thicknesses may be combined.
  • the hair length is preferably 6 mm to 13 mm.
  • the neck portion 3 integrally connects the head portion 2 and the handle portion 4.
  • the neck portion 3 extends from the first position S1 toward the handle portion 4 with the same width or widening and then further widens at the third position S3 with the handle portion 4 in a front view shown in FIG.
  • the length up to the length that is, the length L3 from the first position S1 to the third position S3.
  • the third position S3 is a position where the bending direction of the curve forming the ends of the straight line forming the two edges of the same or the widening of the neck portion 3 or both the edges of the widening part changes in a front view.
  • the length (neck length) L3 of the neck portion 3 is preferably 15 mm or more and 35 mm or less, so that the neck portion 3 touches the lips when the head portion 2 is inserted into the oral cavity of a child. More preferably, it is 30 mm or less.
  • the total length (L2 + L3) of the head portion 2 and the neck portion 3 is preferably 28 mm or more and 68 mm or less, more preferably 30 mm or more and 65 mm or less, in consideration of the length from the child's lip to the back teeth. More preferably, it is 33 mm or more and 61 mm or less.
  • the ratio (%) of the length L3 of the neck portion 3 to the entire length (full length) L5 of the handle body 5 is preferably 5.5% or more and 31% or less, and more preferably 8% or more and 24% or less 10% or more and 20% or less is more preferable.
  • the point at the center in the thickness direction (Z direction) of the tip of the head portion 2 in the side view shown in FIG. 3A is taken as the first point A1, and the length of the handle portion 4 in the front view shown in FIG.
  • the second point A2 is a point located at the center of the direction (X direction) and the width direction and at the center in the thickness direction (Z direction) of the handle portion 4 in the side view shown in FIG. 3A.
  • a point at the center in the thickness direction (Z direction) of the rear end of the handle portion 4 in the side view shown is taken as a third point A3.
  • a part of the surface 3a on the flocked surface 2a side is linear.
  • a part of the surface 3a on the flocked surface 2a side in the neck portion 3 has, for example, a linear shape along a virtual straight line L1 connecting the first point A1 and the second point A2.
  • a straight line is formed along a virtual straight line L2 connecting the first point A1 and the third point A3.
  • a straight line is formed along a virtual straight line L3 connecting the first point A1, the second point A2 and the third point A3.
  • the surface 3a of the neck portion 3 does not necessarily coincide with any of the straight lines L1, L2 and L3, and the thickness direction (Z direction) of the toothbrush 1 centering on the straight lines L1, L2 and L3. It should be within the tolerance set in.
  • the allowable range is, for example, a range of about ⁇ 1 mm in the upper and lower direction of the thickness direction (Z direction) of the toothbrush 1 with respect to the straight lines L1, L2 and L3, for example.
  • the surface 3a by the side of the flocked surface 2a of the neck part 3 extends to the handle part 4 side, and follows the 1st curved surface 4a1 which forms the 1st finger rest part 9A.
  • the back surface 3b of the neck portion 3 extends toward the handle portion 4 and is continuous with the fourth curved surface 4b1 forming the second finger rest 9B.
  • the neck portion 3 of this embodiment has the same width W from the first position S1 to the third position S3 in the length direction, but even if the diameter is enlarged Good.
  • the width W of the neck portion 3 is preferably 4.0 mm or more and 6.0 mm or less, and more preferably 4.5 mm or more and 5.5 mm or less.
  • the cross-sectional shape intersecting the length direction of the neck portion 3 gradually changes from the head portion 2 side of the neck portion 3 to the handle portion 4 side as shown in FIG. 3A, and the width and thickness of the neck portion 3
  • the magnitude relationship with the size is reversed in the length direction. That is, assuming that the position moved 10 mm from the first position S1 to the handle portion 4 side is the fourth position S4, and the position moved 20 mm from the first position S1 to the handle portion 4 side is the second position S2, After being thickened suddenly from the first position S1 to the fourth position S4 and the second position S2, the shape is gradually thickened toward the handle portion 4 side.
  • the width W of the neck portion 3 is preferably smaller and thinner than the thickness T, and the thickness is increased as it goes to the handle portion 4 side, and the cross-sectional area is increased. As a result, even if the thin head portion 2 and the short neck portion 3 are formed, the thin and strong neck portion 3 is formed.
  • the first width W1 is the first.
  • the cross-sectional shape is wider than the thickness T1 (W1> T1).
  • the second position S2 which is a position moved 20 mm from the first position S1 to the handle portion 4 side, as shown in Table 1, the second position S2 has a second width W2 than the second width W2.
  • the thickness T2 is larger (W2 ⁇ T2), and the cross-sectional shape of the thickness is taken.
  • the thickness of the first position S1 is 4 mm
  • the thickness of the fourth position S4 is 5 mm
  • the thickness of the fourth position S4 is 1.25 times the thickness of the first position S1.
  • the thickness of the second position S2 is 5.6 to 5.8 mm
  • the thickness at the second position S2 is 1.12 to 1.16 times the thickness of the fourth position S4, The thickness changes more gently than the change from the first position S1 to the fourth position S4.
  • the thickness of the neck portion 3 increases as going from the head portion 2 side to the handle portion 4 side, but the ratio of increasing the thickness is not constant.
  • the neck portion 3 is favorably bent to the head portion 2 without bending more than necessary during brushing. Power can be transmitted, and brushing can be performed stably.
  • the neck portion 3 of the above configuration makes the width of the portion corresponding to the tip of the mouth thin in use with respect to the thickness, so that the toothbrush 1 can be well managed in the oral cavity.
  • the thickness of the portion corresponding to the tip of the mouth at the time of use becomes thicker with respect to the width, it is difficult to break even when the child bites the neck portion 3 strongly. Even if the head portion 2 is thinned, the strength of the neck portion 3 can be secured.
  • the first thickness T1 which is the minimum thickness of the neck portion 3 can be determined in consideration of the constituent material of the handle body 5, the conditions such as the bending elastic modulus, and the like.
  • the first thickness T1 of the neck portion 3 is preferably 3.0 mm or more and 4.5 mm or less, and more preferably 3.5 mm or more and 4.3 mm or less. Moreover, it is preferable that it is 4.5 mm or more and 7.0 mm or less, for example, and, as for the maximum thickness of the neck part 3, it is more preferable that it is 5.0 mm or more and 6.5 mm or less.
  • the head portion 2 is thinner, and the operability in the oral cavity at the back of the back teeth is improved. Further, by making the thickness with respect to the width of the neck portion 3 thicker from the head portion 2 side toward the handle portion 4 side, excessive bending of the neck portion 3 at the time of use can be achieved while corresponding to the thinness of the head portion 2 It can be suppressed. Therefore, when the handle portion 4 is gripped and brushed, the position of the head portion 2 is not displaced too much, so even a child can firmly apply the hair bundle 7 to the tooth surface. Therefore, it becomes a toothbrush 1 which a child holds firmly and is easy to polish.
  • the handle portion 4 includes a first finger rest 9A and a second finger rest 9B respectively formed on the front and back of the neck 3 and the finger rests 9A, and a gripping portion 6 formed continuously to the finger rest 9B.
  • the length (handle length) L4 of the handle portion 4 is, in a front view, both ends of a straight line that forms both edges of the same or widening portion of the neck portion 3 or both edges of the widening portion It is the distance from the third position S3 where the bending direction of the formed curve changes to the rear end.
  • the length L4 of the handle portion 4 is preferably 80 mm to 110 mm in accordance with the size of the hand of the child who is the user.
  • the ratio (L4 / L3) of the length L4 of the handle portion 4 to the length L3 of the neck portion 3 is preferably 2.5 or more and 12.0 or less, more preferably 3.0 or more and 7.0 or less, More preferably, it is 3.5 or more and 5.5 or less.
  • the handle 4 has a first finger rest 9A convex on the flocked surface 2a and a second finger rest 9B convex on the back 2b And are formed.
  • first finger rest 9A is on the flocked surface 2a side and has a concave first curved surface 4a1 having a center of curvature near the neck portion 3 and the handle portion on the flocked surface 2a side. It is formed in the part which the concave-shaped 2nd curved surface 4a2 which has a curvature center in 4th place cross
  • the first finger rest 9A is a portion where the concave first curved surface 4a1, the concave second curved surface 4a2, the curved surface 4a1 and the curved surface 4a2 intersect, and the flocked surface 2a is It is convexly formed in the flocked surface 2a side by the convex-shaped 3rd curved surface 4a3 which has a curvature center in the back surface 2b side of the other side.
  • a straight line connecting a position P1 of the first curved surface 4a1 where the curvature changes and a position P2 of the second curved surface 4a2 where the curvature changes is an imaginary line J.
  • the first finger rest 9A has a desired height in the direction in which the perpendicular G with respect to the virtual line J extends, and has a convex shape on the flocked surface 2a side shown in FIG. 3A.
  • a ridgeline where the first curved surface 4a1 and the second curved surface 4a2 intersect is formed at a position where the distance from the virtual line J is the largest.
  • a ridgeline formed at the intersection of the first curved surface 4a1 and the second curved surface 4a2 forms a curved first ridgeline 8A as shown in FIG. 2 in the width direction of the handle portion 4.
  • the first finger rest 9A has an arc contour in which the first ridgeline 8A is convexly curved toward the neck portion 3.
  • the distance between the second position S2 and the first ridgeline 8A is preferably 4 mm or more and 22 mm or less, more preferably 5 mm or more and 18 mm or less, and still more preferably 6 mm or more and 15 mm or less.
  • the difference in thickness in side view between the second position S2 and the first ridgeline 8A is preferably 3 mm or more and 9 mm or less, more preferably 3 mm or more and 8 mm or less, and still more preferably 4 mm or more and 7 mm or less.
  • the distance between the second position S2 and the first ridgeline 8A is the second position S2 And the first ridge line 8A.
  • the curved surface formed by crossing the curved surface on the side of the neck portion 3 and the curved surface on the side of the handle portion 4 does not clearly exist, for example, at the joint between the neck portion 3 and the handle portion 4 in front view
  • the position where the curvature is changed and connected to the straight line or the curve forming the handle portion 4 can be set as the position corresponding to the first ridge line described above.
  • the toothbrush 1 when used for a child with a small mouth, it is a short neck portion 3 which is narrowed to the rear end, and a point from the tip to a thick handle portion 4 which can grip the goo
  • the neck portion 3 and the handle portion 4 are connected by a short distance in consideration of the above, stress concentration tends to occur on the strength surface, and operability is easily affected, but in the present embodiment, as described above
  • the neck is set by setting the distance between the second position S2 and the first ridgeline 8A in front view and the thickness difference between the second position S2 and the first ridgeline 8A in side view in an appropriate range. The strength and operability of the portion 3 can be improved.
  • the second finger rest 9B is on the flocked surface 2a side, and a convex fourth curved surface 4b1 having a curvature center near the neck 3 and a back surface opposite to the flocked surface 2a. It is formed at a portion where the concave fifth curved surface 4b2 having the center of curvature is closer to the handle portion 4 on the 2b side.
  • the second finger rest portion 9B is formed by two Rs of a convex fourth curved surface 4b1 and a concave fifth curved surface 4b2, and has a convex shape on the back surface 2b side.
  • a second ridgeline 8B as shown in FIG. 4 is formed across the width direction of the handle portion 4 at the intersection of the fourth curved surface 4b1 and the fifth curved surface 4b2.
  • the second finger rest portion 9B has an arc contour in which the second ridgeline 8B is curved in a convex shape toward the neck portion 3.
  • the amounts of projection of the first finger rest 9A and the second finger rest 9B are different from each other. Since the first finger rest 9A is formed of two concave curved surfaces having the center of curvature on the flocked surface 2a side, the intersection of the first curved surface 4a1 and the second curved surface 4a2 largely protrudes outward in the thickness direction ing.
  • the second finger rest portion 9B is formed by the convex fourth curved surface 4b1 whose center of curvature is located on the flocked surface 2a side and the concave fifth curved surface 4b2 whose center of curvature is located on the back surface 2b side
  • the intersections of the fourth curved surface 4b1 and the fifth curved surface 4b2 do not protrude so much to the outside in the thickness direction.
  • the second finger rest 9B is on the outer side than the back surface 3b of the neck 3 in the thickness direction (Z direction). It does not stand out.
  • the finger rest 9B Since the amount of projection of the second finger rest 9B is smaller than that of the first finger rest 9A, it is difficult for the second finger rest 9B to touch the lips during intraoral manipulation.
  • the finger is guided so as to be attracted to the first finger rest 9A by sufficiently securing the protrusion amount of the first finger rest 9A.
  • the user holds the handle 4 by applying the thumb and forefinger to the first finger rest 9A and the second finger rest 9B respectively, so that the slip of the finger is prevented and the toothbrush 1 is stabilized.
  • the abdominal side of the first joint of the thumb easily contacts the first finger rest 9A, and the lateral flank of the second joint of the forefinger easily contacts the second finger rest 9B. Positioning can be performed, and the sense of stability when gripping the handle portion 4 is enhanced.
  • the width of the gripping portion 6 gradually increases in diameter from the finger rest 9A and the finger rest 9B toward the rear end of the gripping portion 6, and then the diameter is reduced again. It gradually becomes thicker toward the rear end.
  • the above-mentioned diameter expansion and diameter reduction may be repeated two to four times.
  • the thickness of the grip portion 6 gradually increases in diameter from the finger rest portions 9A and the finger rest portions 9B toward the rear end side of the grip portion 6 and then reduces in diameter.
  • the minimum width W6min (FIG. 4) of the grip 6 is smaller than the maximum width W9max (FIG. 4) of the finger rest 9A and the finger rest 9B.
  • the maximum width W6max (FIG. 4) is larger than the maximum widths W9max (FIG. 4) of the finger rest 9A and the finger rest 9B.
  • the maximum width W9max of the finger rest 9A and the finger rest 9B is preferably 12.5 mm or more and 16.5 mm or less, and more preferably 13.5 mm or more and 15.5 mm or less.
  • the maximum width W6max of the gripping portion 6 is preferably 18.0 mm or more and 22.0 mm or less, and more preferably 19.0 mm or more and 21.0 mm or less.
  • the minimum width W6min of the gripping portion 6 is preferably, for example, 8.0 mm or more and 13.0 mm or less, and more preferably 9.0 mm or more and 12.0 mm.
  • the thickness of the holding part 6, 7.0 mm or more and 15 mm or less are preferable. If it is within the range of the above-mentioned size, even a child's small hand can hold firmly.
  • a recessed portion 6A which is recessed inward in the width direction is formed on side surfaces on both sides in the width direction.
  • the user can, for example, place the middle finger on the recess 6A, and the child can hold the handle 4 firmly, which facilitates brushing.
  • the handle portion 4 can be held by applying the thumb and forefinger to each of the recessed portions 6A. Therefore, for example, when brushing the side of the teeth with the toothbrush 1 sideways, stable operation can be performed.
  • the grip portion 6 Furthermore, on the side surface of the portion of the grip portion 6 that gradually thickens toward the rear end side, there are a plurality of curved surfaces that are continuous with the recessed portions 6A and 6A and are convexly curved outward in the width direction; A plurality of depressions formed between the faces are formed. Since the curved surface and the recess are alternately present in the length direction of the grip portion 6, the user's finger is naturally guided to the recess and the grip feeling is increased, and even a child with weak grip strength is stable. Can have. In addition, since the entire handle portion 4 is thick and has no corners, it can be firmly held by the small hand of a child.
  • the toothbrush 1 of this embodiment is manufactured according to the manufacturing method of a conventionally well-known toothbrush.
  • a hard resin is injected into a mold to mold the handle 15.
  • the toothbrush 1 is obtained by implanting the hair bundle 7 on the flocked surface 2 a of the obtained handle body 5.
  • a method of implanting the hair bundle 7 for example, flat wire type flocking, hair bundle 7 in which the hair bundle 7 is planted by folding the hair bundle 7 in two and driving a flat line sandwiched between them into the hair filling hole 2h.
  • the heat fusion method in which the lower end of the hair bundle 7 is pressed into the molten resin to be the flocked part 11 and fixed, the lower end of the hair bundle 7 is heated to form a molten mass, and then the molten resin is injected into the mold to In-mold method etc. which shape
  • molds are mentioned.
  • the toothbrushes of Examples 1 to 2 and Comparative Examples 1 to 8 were produced by injection molding according to the specifications shown in Table 1 for the toothbrushes shown in FIGS. 1 to 4. The dimensions of each toothbrush are as shown in Table 1.
  • the toothbrushes of Examples 1 and 2 provide good operability in the oral cavity of a child.
  • toothbrush 1 shown by each embodiment described above favorable operativity is obtained in a child's oral cavity.
  • toothbrush shape adapted to the child's growth it is possible to properly polish a hard-to-clean area in the oral cavity.
  • the anti-slip effect can be improved and the design can be improved.
  • the present invention is applicable to a toothbrush.

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  • Brushes (AREA)
PCT/JP2018/033018 2017-09-13 2018-09-06 歯ブラシ WO2019054266A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SG11202002225WA SG11202002225WA (en) 2017-09-13 2018-09-06 Toothbrush
JP2019542017A JP7557938B2 (ja) 2017-09-13 2018-09-06 歯ブラシ
CN201880059583.1A CN111093430B (zh) 2017-09-13 2018-09-06 牙刷
KR1020207007323A KR102697852B1 (ko) 2017-09-13 2018-09-06 칫솔

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017175906 2017-09-13
JP2017-175906 2017-09-13

Publications (1)

Publication Number Publication Date
WO2019054266A1 true WO2019054266A1 (ja) 2019-03-21

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PCT/JP2018/033018 WO2019054266A1 (ja) 2017-09-13 2018-09-06 歯ブラシ

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Country Link
JP (1) JP7557938B2 (ko)
KR (1) KR102697852B1 (ko)
CN (1) CN111093430B (ko)
SG (1) SG11202002225WA (ko)
TW (1) TWI767054B (ko)
WO (1) WO2019054266A1 (ko)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56136503A (en) * 1980-03-26 1981-10-24 Oriental Pharm Synth Chem Tooth brush
JPH10215949A (ja) * 1997-02-03 1998-08-18 Lion Corp 歯ブラシハンドル
JPH1175937A (ja) * 1997-09-10 1999-03-23 Kao Corp 乳幼児用歯ブラシ
JP2001299450A (ja) * 2000-04-27 2001-10-30 Lion Corp 歯ブラシ
JP2003275027A (ja) * 2002-03-22 2003-09-30 Sunstar Inc 歯ブラシ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5530776B2 (ja) * 2010-03-24 2014-06-25 ライオン株式会社 歯ブラシ
JP6170802B2 (ja) * 2013-10-02 2017-07-26 ライオン株式会社 歯ブラシ用のハンドル体及びその製造方法ならびに歯ブラシ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56136503A (en) * 1980-03-26 1981-10-24 Oriental Pharm Synth Chem Tooth brush
JPH10215949A (ja) * 1997-02-03 1998-08-18 Lion Corp 歯ブラシハンドル
JPH1175937A (ja) * 1997-09-10 1999-03-23 Kao Corp 乳幼児用歯ブラシ
JP2001299450A (ja) * 2000-04-27 2001-10-30 Lion Corp 歯ブラシ
JP2003275027A (ja) * 2002-03-22 2003-09-30 Sunstar Inc 歯ブラシ

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TW201927205A (zh) 2019-07-16
JP7557938B2 (ja) 2024-09-30
TWI767054B (zh) 2022-06-11
JPWO2019054266A1 (ja) 2020-10-15
KR20200051640A (ko) 2020-05-13
KR102697852B1 (ko) 2024-08-23
CN111093430A (zh) 2020-05-01
CN111093430B (zh) 2021-12-03
SG11202002225WA (en) 2020-04-29

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