WO1999058019A1 - Brosse a dents - Google Patents

Brosse a dents Download PDF

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Publication number
WO1999058019A1
WO1999058019A1 PCT/JP1999/002469 JP9902469W WO9958019A1 WO 1999058019 A1 WO1999058019 A1 WO 1999058019A1 JP 9902469 W JP9902469 W JP 9902469W WO 9958019 A1 WO9958019 A1 WO 9958019A1
Authority
WO
WIPO (PCT)
Prior art keywords
flocking
longitudinal direction
hole
toothbrush
handle
Prior art date
Application number
PCT/JP1999/002469
Other languages
English (en)
Japanese (ja)
Inventor
Atsushi Yamamoto
Shinya Sakurai
Kazushi Ebisudani
Original Assignee
Sunstar Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP13081898A external-priority patent/JP3813734B2/ja
Priority claimed from JP11006923A external-priority patent/JP2000201739A/ja
Application filed by Sunstar Inc. filed Critical Sunstar Inc.
Priority to EP99919556A priority Critical patent/EP1080663A1/fr
Priority to CA002331186A priority patent/CA2331186A1/fr
Publication of WO1999058019A1 publication Critical patent/WO1999058019A1/fr

Links

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
    • A46B9/04—Arranged like in or for toothbrushes
    • 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
    • A46B9/045—Arranged like in or for toothbrushes specially adapted for cleaning a plurality of tooth surfaces simultaneously

Definitions

  • the present invention relates to a toothbrush which is excellent in cleaning properties for interdental parts and cervical parts and cleaning properties for smooth surfaces such as tooth surfaces.
  • the toothbrush cleans, that is, brushes the teeth in the oral cavity by the repulsive force of the monofilament of the hair bundle implanted in the implanted hole of the handle. Since the greater the repulsion, the greater the cleaning effect, a toothbrush that basically has a high repulsion in the brushing direction is required. In addition, the toothbrush needs to be devised so that it can exert its own cleaning power on each part according to the condition of the part to be cleaned. There are various types of cleanliness according to the condition of the part to be cleaned, and typical ones are cleanliness for smooth tooth surfaces and cleanliness for intricate details. The intricate details include the interdental area, the cervical area, and the occlusal surface.
  • the interdental area which is the corner area, is liable to deposit food residues and plaque,
  • the ability to clean the interdental area is of particular importance, as it often causes periodontal disease.
  • toothbrushes have a general problem of increasing the repulsive force, and at the same time, have a problem of improving the cleaning effect on interdental portions while maintaining a cleaning effect on smooth surfaces. Is waiting.
  • a toothbrush disclosed in Japanese Patent Application Laid-Open No. 9-149815 by the present applicant has been developed to meet such a purpose.
  • This toothbrush has, in a bristle bundle constituting a flocking portion, a bristle bundle having a substantially elliptical cross-sectional shape widened in the longitudinal direction of a handle and having a tip converged in a roof shape. At least one or more.
  • Such a bundle has a different amount of filament accumulation depending on the direction. Therefore, it is possible to improve the smoothness of the clean surface by matching the direction in which the bristle is strong with the brushing direction.
  • the tip of the hair bundle converges, it is easy to insert details such as between teeth. Also has a great advantage of being excellent.
  • a hair bundle converging section is constructed by inclining adjacent bristle bundles so as to support each other and bringing the bristle bundles into contact at the tips. Some have done it. Since the bristle bundle converging part has high density and strong bristle, and the bristle bundles are not easily disintegrated, the supporting direction is set according to the brushing direction, so that it can be applied to the interdental region and the cervical region. There is an advantage that a toothbrush which is excellent in the detail insertion of the toothbrush and has improved cleaning properties for these parts can be obtained.
  • a toothbrush that is suitable for brushing by the scrubbing method, has a high cleaning effect, and has excellent smooth surface cleaning properties and fine cleaning properties is required. Appearance and durability cannot be ignored. For example, for the appearance of a toothbrush, it is important that monofilaments are evenly distributed in the flocked holes and beautiful wool is realized. It is important that the hair tips do not spread (the so-called “sagging”) and cracks do not occur in the flock during use. Disclosure of the invention
  • the toothbrush of the present invention is characterized in that the flocking hole formed in the flocking portion is substantially elliptical or substantially rectangular, and the flocking hole is inclined with respect to the flocking surface.
  • the hair bundle is fixed to the flocking hole using a flat line as in the past, but with this toothbrush, the flocking hole has a substantially elliptical shape or a substantially rectangular shape, and is inclined with respect to the flocking surface.
  • the implanted hair bundle has a substantially elliptical or substantially rectangular cross-sectional shape, and becomes a hair bundle inclined with respect to the flocking surface.
  • the flocked holes have a substantially elliptical shape or a substantially rectangular shape, and the number of the filaments constituting the bristle bundle differs between the wide and narrow directions of the bristle bundle. The difference comes out. Therefore, by setting the longitudinal direction of the flocking hole in consideration of the brushing method, a high hair stiffness can be obtained, and an excellent cleaning effect can be obtained.
  • the waist is a concept expressed by the magnitude of the repulsive force (restoring force) that acts when the hair bundle is deformed under pressure.
  • a converging portion having a large repulsive force is formed at a tip portion of a converging block of the hair bundle formed by supporting the inclined hair bundles.
  • This tip can be easily inserted into intricate details such as between teeth and cervical cervix, and the inserted hair bundle can be used to clean these parts vigorously.
  • the hair bundle can be streamlined, so that the contact resistance when starting to contact the teeth can be reduced.
  • the arrangement direction of the substantially oval or substantially rectangular flocking holes is selected according to the brushing operation.
  • the longitudinal direction of the flocking hole is made to extend along the longitudinal direction of the handle.
  • the expression “along the longitudinal direction” includes not only a state parallel to the longitudinal direction but also a slightly inclined state.
  • both ends of the bristle bundle in the longitudinal direction of the handle become curved narrow tops.
  • the flocked holes face each other and are inclined inwardly to form a pair of hair bundles, and at least one of the bundles is provided.
  • the monofilament constituting the hair bundle implanted in the hair implantation hole may have a circular cross section, but is more preferably a rectangular cross section.
  • a monofilament having a rectangular cross section is used, and the hair is implanted in the longitudinal direction in the cross-sectional shape of the monofilament, that is, the long side is along the longitudinal direction of the implanted hole, the repulsive force of the monofilament when brushing is performed by the scrubbing method. Can be further enhanced.
  • the stimulus felt in the oral cavity is correlated with the cross-sectional area of the monofilament. If the cross section of the monofilament is small, the irritation is also small.
  • the cross-sectional area required to obtain the same repulsive force is smaller for a monofilament with a rectangular cross section, so that a toothbrush using a monofilament with a rectangular cross section is used in the oral cavity. Irritation to the tissue can be reduced.
  • the hair bundle implanted in the slanted hair implantation hole constitutes a pair of converging blocks by leaning two facing hair bundles on each other, and that a plurality of these converging blocks are provided.
  • each bristle bundle is processed into a mountain-cut shape from the viewpoint of improving the cleanability in detail.
  • the tip By making the tip a mountain-cut shape, the detail cleaning performance is further enhanced.
  • the cleaning ability in the handle width direction as well as the cleaning in the handle longitudinal direction is enhanced.
  • the number of filaments included in one bundle forming a mountain-cut shape is larger than that of a general toothbrush forming one mountain in two bundles, and the repulsive force of the hair bundle is extremely strong.
  • the number and arrangement of the converging blocks constituted by the pair of hair bundles leaning and joining together can be set as appropriate, but it is preferable to provide at least a converging block at the front end or the rear end in the longitudinal direction of the handle. .
  • next row of convergence blocks be positioned behind the gap formed between the convergence blocks arranged in the front row in the longitudinal direction of the handle. In this way, the remaining row of the converging block in the front row is polished by the converging block in the next row. The smooth surface will be polished throughout.
  • the bristle bundle is bent at the center position in the longitudinal direction, and is embedded in the flocking hole by a flat line having a length crossing the bent portion, whereby the bristle bundle is fixed and supported in the flocking hole.
  • the flat wire is driven in a position substantially parallel to the long side or the short side of the flocking hole and at a position that bisects the opening area of the flocking hole. To do. By doing so, the filling state of the filaments pressed into the respective areas defined by the flat lines is made uniform, and it is possible to eliminate hair loss due to the density of the filling density.
  • the appearance after flocking is also beautifully arranged.
  • the flat line When the flat line is arranged in a posture substantially parallel to the longitudinal direction of the flocking hole, it is desirable that the flat line is arranged within ⁇ 10 ° with respect to a center line along the longitudinal direction of the flocking hole.
  • the formation position of the flocking hole may be shifted so that the center of the flocking hole does not line up in a straight line in the longitudinal direction of the handle.
  • the existing range of the flocking hole is in the range of 10 to 30 nun in the longitudinal direction of the handle and 5 to 15 bandages in the width direction of the handle.
  • the presence of a flocked hole like this By defining the range, the size of the brush brush cleaning surface is defined as a result. If the area where the flocked holes are present is within the above range, the operability in the mouth does not decrease while the smooth surface such as the front teeth can be efficiently polished.
  • the short side of the flocking hole is set to a size range of 0.8 to 2.0 and the long side is set to a size range of 1.5 to 5.0 thigh. If the size of one flocking hole is within this range, the size of the tip of the converging portion formed by the support of adjacent bristle tufts is important for realizing both smoothness cleaning and detail cleaning. It will be optimal. It is preferable that the separation distance at the base of the pair of hair bundles constituting the converging block is set in the range of 0.2 to 4.0 thighs.
  • the converging shape can be obtained even during long-term use. Collapse can be prevented.
  • the toothbrush obtained in this way, five rows of bristle bundles are provided in the longitudinal direction of the flocking table, and the first row and the fifth row are converging blocks at the center in the width direction of the flocking table.
  • the second and fourth rows two converging blocks are arranged on both sides of the center of the flocking table in the width direction, and in the third row, one converging block is arranged in the center of the flocking table in the width direction.
  • one independent hair bundle is arranged outside the convergence block in the same direction as the hair bundle constituting the convergence block and inclined at an angle range in which the tip does not contact the convergence block.
  • FIG. 1 is a plan view showing the overall configuration of the toothbrush of the present invention
  • FIG. 2 is a perspective view showing a flocking portion of a representative embodiment of the present invention
  • FIG. 3 is a plan view of the flocking portion
  • Fig. 5 is a left side view of the flocking section viewed from the front end side
  • Fig. 6 is a plan view showing the shape and arrangement of flocking holes formed in the flocking table
  • Fig. 7 is Fig. 6 is a sectional view taken along the line I-I in Fig. 6,
  • Fig. 8 is a sectional view taken along the line IV-IV in Fig. 6,
  • Fig. 9 is a sectional view taken along the line m-m in Fig.
  • FIG. 11 is a sectional view taken along line V--V in FIG. 6,
  • FIG. 11 is an explanatory view showing a mode of driving a flat wire into a flocking hole, and an arrangement of flocking holes into which the flat line is driven;
  • Fig. 13 shows how a flat wire is driven into the flocking hole and this flat wire
  • FIG. 14 is an explanatory view showing the arrangement of the flocking holes into which the flat lines are driven, and
  • FIG. 14 is an explanatory view showing an arrangement of the flat lines into the flocking holes in the conventional toothbrush, and the arrangement of the flocking holes into which the flat lines are driven.
  • FIG. 15 is an explanatory view showing a hair bundle tip portion in a mountain-cut shape
  • FIG. 16 is a modified example of the mountain-cut shape
  • FIG. 17 is a modified example of the mountain-cut shape
  • FIG. 18 is a mountain-cut shape
  • FIG. 19 is an explanatory view showing a tooth row
  • FIG. 20 is an explanatory view showing a state where a flocked portion is applied to the front of the tooth row
  • FIG. FIG. 22 is an explanatory view showing the brushing state
  • FIG. 22 is an explanatory view showing the brushing of the molars
  • FIG. 23 is an explanatory view showing the movement of the molars sequentially moving between the bristle bundles
  • FIG. 24 shows a modified example of the hair bundle array
  • Fig. 25 is an explanatory diagram of the verification part of the smooth surface cleaning performance and detail cleaning performance
  • Fig. 26 shows the comprehensive evaluation of the smooth surface cleaning performance and corner cleaning performance.
  • Fig. 28 is a graph showing the evaluation of the cleanliness of a smooth surface
  • Fig. 30 is a monofilament with a rectangular face cut into a roughly oval-shaped flocking hole
  • FIG. 31 is a cross-sectional view showing a flocked portion of the second embodiment
  • FIG. 31 is a plan view showing a flocked portion of a modified example in which the number and arrangement of flocked holes are changed in the same embodiment.
  • Fig. 33 is an explanatory view showing a rectangular flocking hole with a circular monofilament implanted
  • Fig. 33 is an explanatory diagram showing an oval flocking hole with a rectangular monofilament implanted
  • Fig. 34 is a monofilament with a rectangular cross section
  • Fig. 35 shows the flow of molten synthetic resin when forming a rectangular flocking hole.
  • Fig. 36 shows the oval flocking hole.
  • the longitudinal direction refers to the longitudinal direction of the handle
  • the width direction refers to the width direction of the handle.
  • the handle longitudinal direction is the same direction as the flocking table longitudinal direction
  • the handle width direction is the same direction as the flocking table width direction.
  • Fig. 1 shows the handle before hair bristle implantation.
  • the toothbrush of the present invention is characterized by the mode of the flocked portion indicated by A in the figure, and the shape of the neck portion B and the grip portion C is arbitrary.
  • the configuration of the flocking section A will be described.
  • the feature of the toothbrush of the present invention is that the opening shape of the flocking hole formed in the flocking portion is substantially oval. Or a substantially rectangular shape, and the flocking holes are inclined with respect to the flocking surface. It is important to note that the resilience when brushing in the longitudinal direction and the width direction of the flocking hole differs due to the fact that the flocking hole has a substantially elliptical shape or a substantially rectangular shape. In addition, a large repulsive force is obtained, and in addition to this, the flocking holes are inclined, and the tips of the bristle bundles implanted in the flocking holes have a shape that converges in the inclined direction, so that cleaning properties for details are improved. (Hereinafter referred to as detail cleaning).
  • a hair bundle to be implanted in the hair implantation hole is configured by assembling monofilaments.
  • the cross-sectional shape of the monofilament is not limited.
  • a monofilament having a generally circular cross section may be used, or a monofilament having a rectangular cross section may be used as described later.
  • the repulsive force in the longitudinal direction of the monofilament cross section is used. Becomes big.
  • the cross-sectional area required to obtain the same repulsive force can be made smaller than that of a monofilament having a circular cross section, the stimulation of the tissue in the oral cavity becomes mild.
  • embodiments of the toothbrush of the present invention will be described.
  • a case where a monofilament having a circular cross section is planted in a rectangular flocking hole will be described, and then a case where a monofilament having a circular cross section will be planted in an oblong flocking hole.
  • Fig. 2 shows the appearance of the implanted portion of a typical embodiment
  • Fig. 3 is a plan view of the implanted portion
  • Fig. 4 is a front view
  • Fig. 5 is a side view of the flocking portion as viewed from the front end side.
  • the flocking hole has a rectangular shape, and a monofilament having a circular cross section is used.
  • the hair bundles 11, 12, 21-24, 31-34, 41-44, 51, 52 are arranged in five rows in the longitudinal direction, and the maximum in the width direction. Four rows of hair bundles are arranged.
  • the vertical cross-sectional shape of the flocking hole into which the bristle bundles are planted is indicated by adding “a j” to the reference numeral of the corresponding bristle bundle.
  • Each bristle bundle is set up from a rectangular flocking hole whose longitudinal side is aligned with the longitudinal direction of the handle. Then, the hair bundles that are adjacent to each other in the width direction of In this configuration, a block of hair bundles that converge toward the tip (hereafter referred to as a convergence block R) is formed in units of a pair of hair bundles facing each other, and a plurality of blocks of convergence blocks R are provided.
  • the convergence block R crosses the formation position of the convergence block R between the front row and the rear row so that when the brushing operation for reciprocating the handle in the longitudinal direction is performed, the entire tooth surface, which is a smooth surface, can be uniformly cleaned. Staggered from each other.
  • the inner bristle bundles 32 and 33 are brought together, so that the outer bristle bundles 31 and 34 are isolated bristle bundles.
  • the hair bundles 31 and 34 are slightly inclined inward, but may be upright.
  • the spacing W between the converging blocks R adjacent to the flocking table width direction is set slightly smaller than the average tooth width, and cleaning is performed when brushing that reciprocates the handle in the longitudinal direction is performed.
  • the target tooth is pinched between the converging blocks R, and both sides of the tooth are sufficiently cleaned.
  • the hair bundles are tilted by inclining the hair implantation holes themselves and press-fitting the hair bundles into the inclined hair implantation holes using a flat wire.
  • inclining the flocking hole itself even when the acting force that breaks the inclining posture of the bristle bundle is repeatedly applied during brushing, the inclining posture of the bristle bundle can be maintained firmly.
  • FIG. 6 shows the arrangement of the flocked holes on the flocking table 1, and cross-sectional views of each of the five rows arranged in the longitudinal direction of the flocking table are shown in FIGS.
  • the inclination angle of the flocking hole may be set according to the strength of the hair to be obtained, but is usually set in the range of 2 ° to 10 ° with respect to the vertical direction of the inclined hole. If the inclination is smaller than 2 °, it is necessary to make the hair length extremely long in order to bring the tips of the facing hair bundles into contact with each other, which is not preferable. On the other hand, if it is larger than 10 °, it is difficult to form the handle. Further, it is preferable that the distance between the bases of the hair bundles constituting the converging block R be set in the range of 0.2 to 40.
  • the angle of inclination of the flocking hole may be changed depending on the position where the converging block R is formed, or may be the same as in this embodiment.
  • the bristle tips have a mountain-cut shape with a slope along the long side of the flocking hole to further enhance the insertion into interdental details, and the tip has a sharp mountain-cut shape to penetrate. Increases the effect of exposing plaque and food residues in the details.
  • the size of the rectangular flocking hole is such that the short side S is 0.8 to 2.0 ridges and the long side L is 1.5 to 5.0 thighs.
  • the direct surface pressure on the tooth surface depends on the shape of the tip of the bristle bundle, but if the size of the flocking hole is smaller than the above range, the pressing force to be transmitted to the tip of the bristle bundle is insufficient.
  • the reason for using a rectangular square hole as a flocking hole here is that brushing is performed by giving a difference depending on the direction to the number of accumulated filaments and giving repulsive force when the hair bundle is pressurized, that is, by giving direction to the hair waist. This is to obtain strong hair stiffness depending on the direction.
  • the long side of the flocking hole is formed along the longitudinal direction of the handle, so that reciprocation in the longitudinal direction of the handle is mainly performed. This is to ensure that strong hair is obtained when brushing is performed.
  • the area where the flocking holes exist is set in the range of 10 to 30 rows in the longitudinal direction of the handle, and in the range of 5 to 15 rows in the handle width direction. If the area where the flocked holes exist is too small, the contact area with the tooth surface is small and cleaning efficiency is reduced.
  • the hair bundle is fixed to the flocking hole by driving a flat line in the same way as a conventional toothbrush.
  • the flat line is a metal plate having a size of about 1.6 mra X 0.22 thighs. It is inserted into a U-shaped bristle bundle and driven into the flocking hole with the bristle bundle. By fixing both ends in the direction to the peripheral wall of the flocking hole, the hair bundle is fixed to the flocking hole.
  • the flocked hole was circular, so the flat line was driven along the diameter of the flocked hole as shown in Fig. 14, but in the present invention, as shown in Fig.
  • a flat line P is inserted in a position parallel to the long side of the flocking hole H and at a position where the opening area of the flocking hole bisects the sections HI and H2. Also, in order to avoid the possibility of trap cracking as a result of the driven flat lines P being aligned on a straight line, the position of the flocked holes is slightly shifted in the width direction.
  • the area is divided by the flat line P.
  • the occurrence of hair loss is significantly reduced. Also, since the filament can be filled uniformly, the appearance after flocking is beautiful.
  • FIG. 15 shows a hair bundle tip processed into a mountain-cut shape.
  • the slopes r, r toward the top are provided along the bristle bundle wide direction.
  • the present embodiment is also characterized in that a single bundle of hair forms the peak of the chevron.
  • the slopes r, r toward the top of the chevron are perpendicular to the direction in which the hair bundles lean.
  • the tip of the handle is narrowed in the direction orthogonal to the convergence direction by the mountain-cut shape, so that the handle In addition to being able to insert into the details when brushing in both directions of operation and left and right operation, it is effective to remove food residue and plaque by obtaining a sharp and strong hair tip. To be able to do it.
  • the slope toward the top of the chevron may be formed along the direction in which the hair bundles lean. Also, various shapes may be considered as long as they fall within the category of the mountain-cut shape.
  • a trapezoidal slope r1 is formed as a slope on the front and back sides in the direction in which the hair bundle leans, or an isosceles triangle as shown in Fig. 17.
  • Those formed with r2, and those formed with a right-angled triangular slope r3 as shown in Fig. 18 can be appropriately adopted.
  • the toothbrush of the present invention has an excellent cleaning effect on the smooth surface Z1, and has an intricate portion between adjacent teeth Z2, an occlusal surface Z3 of a molar, etc.
  • the cervical Z4 as shown in FIGS. 20 and 21 has an excellent cleaning effect, the interdental Z2 exerts a particularly remarkable cleaning effect.
  • FIG. 20 shows how the tooth surface is cleaned using the toothbrush of this embodiment. As shown in this figure, there is a gap SP between the convergence blocks R and R that constitute each row of the flocking section, and the corresponding position in the next row, which is the position behind this gap SP, is as follows. There is a column convergence block R.
  • FIG. 21 shows how the cervical part Z4 is cleaned. As shown in the figure, the converged tip of the converging block enters the cervix, and the food residue and plaque deposited on the cervical site can be effectively extracted.
  • Cleaning between teeth Z2 is performed by reciprocating the toothbrush in the vertical direction, but this reciprocating operation may be performed along the longitudinal direction of the teeth in the dentition direction or perpendicular to the dentition direction. It may be performed in a posture. In the former case, the fact that the tip of the bristle bundle has a mountain-cut shape greatly contributes to the improvement in the insertion between teeth.
  • the converging shape of the tip of the bristle bundle that is leaning ensures insertion between teeth and allows sediment between teeth to be extracted.
  • Fig. 22 shows the occlusal surface Z3 of the molar tooth being brushed by the third row of hair bundles in the implanted portion.
  • the tip of the converging hair bundle of the converging block R composed of two bundles leaning inside penetrates deeply into the intricate groove of the occlusal surface Z3, and the sediment on the occlusal surface Z3 is pushed with strong hair.
  • the outer two bundles function to hold the molars and clean both sides of the molars.
  • the third row which is most effective in cleaning the occlusal surface Z3, has been described as an example. The insertability can be exhibited.
  • the toothbrush of this embodiment also has the following characteristic cleaning action.
  • the mechanism shown in Fig. 23 works.
  • the first molar is the first ⁇ * i
  • the target posterior teeth were separated from the second row of hair bundles as indicated by arrows in the figure, and the imaginary line in the figure.
  • the target molar is surrounded by a bristle bundle, and the front surface in the advancing direction is cleaned by the central convergence block R3 in the third row. They are cleaned by the second row of tresses. The same operation is performed at the time of the next transition to the third position P3, and the target molar is sufficiently cleaned.
  • the mode of the second, third, and fourth rows of the hair bundle row that constitutes the flocking section is such that two pairs of converging blocks are arranged, or one pair of converging blocks in the center.
  • the hair bundles are arranged so that a bundle of hairs slightly inclined inward is provided on each side, but the configuration of each hair bundle row is not limited to this.
  • the bristle bundles located on both sides of the bristle row are inclined outward, or no convergence block is provided as shown in Fig. 24 (b).
  • the four bundles of hair may all be inclined outward.
  • the present inventor compared a conventional toothbrush with a conventional toothbrush using a jaw model for smooth surface cleaning performance and fine cleaning performance.
  • a toothbrush having the flocked form shown in Fig. 2 (hereinafter referred to as a prototype 1) was used as a toothbrush to substitute the present invention, and a commercially available product conventionally known was used as a comparative object. did.
  • a comparative product A and a comparative product B were prepared as toothbrushes to be compared (hereinafter referred to as comparative products).
  • Comparative product A is a toothbrush that has a substantially rectangular flocked hole and forms a mountain-cut shape in two bundles.
  • Comparative product B is a toothbrush having a substantially rectangular flocked hole and having a hair cutting mode in which a bristle height is provided for each row of flocked holes in the longitudinal direction of the handle.
  • the lower right first molar was selected as the target site for comparison of cleanability.
  • the detail cleaning property means cleaning property for intricate parts such as interdental, cervical, occlusal surfaces, etc.
  • corner cleaning property which is cleaning property between teeth, was verified.
  • Brushing is a posture in which the longitudinal direction of the handle is aligned with the tooth row direction (almost horizontal posture), and this toothbrush is reciprocated in the longitudinal direction of the handle.
  • the brushing conditions are as follows. The brushing speed was set to 0 g, the brushing time was set to 6 seconds, the amplitude was set to 10 mm, the brushing speed was set to 37 mm per second, and the stroke time was set to 0.225 seconds.
  • the cleaning result of the lower right first molar was evaluated.
  • the tooth surface of the molar was occupied by a 70% area of a "smooth surface" (portion indicated by F in the figure).
  • the portion occupying% was defined as a “corner” (portion indicated by K in the figure), and the cleanability of both these portions was evaluated.
  • the cleanability is calculated by subtracting the area of the soil after the cleaning test from the area of the soil before the cleaning test and dividing the result by the area of the soil before the cleaning test. is there.
  • the results are shown in Tables 1 and 2, and the average values are shown in Figures 26, 27, and 28.
  • the test method was as follows. After subjecting one subject to brushing at least twice a day for 7 days, the amount of plaque before and after brushing was measured, and the plaque removal rate by brushing was evaluated.
  • FIG. 30 shows a flocked portion of the toothbrush.
  • this toothbrush has one flocking hole 100, two flocking holes 110, 120, three flocking holes 130, 140, 1 5 0 is arranged, and the flocking hole 1 0 0 at the tip and the flocking hole 1 4 0 at the center of the 3 flocking holes at the rear end are vertical holes, and 2 flocking holes in the second row 1 1 0 and 120 are inclined at an angle of 3 ° toward each other (toward the center of the flocking table), and flocking holes 130 and 150 located on both sides of the central flocking hole 140 at the rear end. Are inclined at an angle of 3 ° toward each other, and monofilaments having a rectangular cross section are implanted in these implanted holes.
  • the collection of monofilaments is represented as a set of small rectangular bodies in each flocking hole, and the flat line is drawn across the center in the width direction of each flocking hole in the longitudinal direction.
  • the hair bundles located on both sides in the width direction of the flocking table are tilted inward, so that when brushing is performed to reciprocate the handle in the longitudinal direction, the filaments move outward in the width direction of the flocking table. It is intended to prevent escape toward the head and reduce the repulsion due to the escape of the filament.
  • a toothbrush with a relatively small number of flocked holes and a relatively small size of the flocked bed is illustrated as an example. As shown in the drawing, various arrangements can be adopted, such as an arrangement having the same arrangement of flocking holes as in the above embodiment.
  • an oval flocking hole is targeted, but any shape close to an oval is included in the concept of a substantially oval shape defined in the present invention.
  • the concept of a substantially elliptical shape is, in addition to the literally elliptical flocking hole 100 as shown in Fig. 33, and the substantially elliptical flocking hole 100 'as shown in Fig. 34. included.
  • a monofilament having a circular cross section was implanted in the rectangular implanted hole 100 "as shown in FIG. 32, whereas in the present embodiment, such an oval or elliptical shape was used.
  • the difference is that a monofilament having a rectangular cross section is implanted in a slanted implanted hole having an opening shape.
  • the reason why the detail cleaning property is enhanced is that if the implanted hole is oval and the longitudinal direction of the implanted hole matches the longitudinal direction of the handle, the hair bundle implanted in the implanted hole is streamlined at both ends in the longitudinal direction of the handle This is because the width becomes narrow and the insertability into the details is improved. The reason for the breakage of the flocking table is eliminated and the durability of the toothbrush is increased for the following reasons.
  • the toothbrush is molded using an injection molding die, and the flocking table with the flocking holes is formed by filling a molten synthetic resin into the space (cavity) for forming the flocking table of the mold.
  • the cavity there are a number of pins for forming flocking holes.Molten synthetic resin is poured around these pins for forming flocking holes, and after the synthetic resin is cured, the mold is opened, and at the same time, the pins for forming flocking holes are formed. A flocked hole is formed by pulling out.
  • the flocking hole is formed in this manner, and a pin having a shape corresponding to the shape of the flocking hole to be obtained is used as the flocking hole forming pin, and the molten synthetic resin flows due to the shape of the flocking hole forming pin.
  • the aspect is different, and this affects the bed split of the flocking table. For example, when the shape of the flocking hole is a rectangular hole, the corner portion 201 exists in the flocking hole forming pin 200 as shown in FIG.
  • the corner portion 201 exists, the molten synthetic resin that passes through the corner portion 201 and flows into the gap 205 between the adjacent flocked hole forming pin 210 and the flocked hole forming pin It is difficult to flow along the surface of 200, and as a result, it is not possible to perform good resin bonding when merging past the flocking hole forming pin 200. Therefore, cracks are likely to occur from a portion where the resin bonding is not sufficient, and particularly when a flat wire is driven in parallel with the longitudinal direction of the flocking hole, the flat wire is driven into a portion where the resin bonding is not sufficient. Therefore, a base crack is more likely to occur. This is particularly remarkable when the widthwise centerline of the adjacent flocking hole overlaps the extension line on the widthwise centerline of the flocking hole as shown in Fig. 35, that is, when the gap between the adjacent flocking hole is narrow. .
  • the flocking hole is oval
  • the flocking is performed as shown in Fig. 36.
  • the molten synthetic resin flows smoothly along the semicircular curved surface of the hole forming pin 300, and the resin bonds when the molten synthetic resin passes through the flocking hole forming pin 300 and merges. Is performed well, and the resin bonding is performed with sufficient strength. Therefore, the possibility of cracks can be drastically reduced, and a highly durable tooth brush that does not crack even if a flat wire is driven in parallel with the longitudinal direction of the flocking hole. be able to.
  • the longitudinal direction of the rectangular cross section is made to coincide with the longitudinal direction of the handle using a monofilament having a rectangular cross section, when the brushing method of reciprocating in the longitudinal direction of the handle is adopted, the repulsive force of the hair bundle is It is extremely large, and the bristle bundles located on both sides in the width direction of the flocking table are inclined inward, so that the filament does not escape when brushing is performed, and the repulsive force of the bristle bundle is effectively reduced Fired.
  • the present inventor conducted a test on a toothbrush using an oval-shaped flocking hole to examine how the presence or absence of the flocking hole and the difference in the cross-sectional shape of the monofilament affect the repulsion force when the brushing operation is performed. went.
  • prototype 2 according to this example and comparative products C, D, and E in which monofilaments having a circular cross section were implanted were prepared, and the repulsive force of the monofilaments of these toothbrushes was compared.
  • the toothbrushes shown in Fig. 30 had the same shape and arrangement of the flocking holes as those shown in Fig. 30, and the comparative product C had 17 flocking holes.
  • the comparative product C had 17 flocking holes.
  • the implanted hole of comparative product C is a vertical hole with a circular cross-section of ⁇ .190 dia.
  • the implanted hole of comparative product D is a vertical hole of circular cross-section with a diameter of ⁇ 0.160.
  • the flocking hole of the prototype 2 of this embodiment is a flocking hole with a rectangular cross section of 0.25 4 mraX 0.16 2 pressure.
  • the four flocking holes located on the outer side in the width direction of the flocking table were inclined inward by 3 °.
  • the measured repulsion force is "repulsion force per unit area in the longitudinal direction of the handle” and “repulsion force per unit area in the handle width direction”, and the ratio of these two repulsion forces is calculated. It was expressed as “the ratio of repulsive force in the longitudinal direction to the width direction” and compared.
  • the repulsive force of a monofilament is calculated according to the International Standard (ISO), and measures the reaction force generated when a resistance is applied to a 1/3 length portion of a monofilament and elastically deformed. The unit is expressed in Newton (N). Table 4 shows the results.
  • the toothbrush of prototype 2 according to the present invention has a larger repulsive force per unit area in the longitudinal direction of the handle than all of the comparative products C, D, and E, and has a rebound in the longitudinal direction of eight handles. It was confirmed that the force was much larger than in the width direction. Thus, it was found that the toothbrush of prototype 2 according to the present invention was suitable for the brushing method in which the handle was reciprocated in the longitudinal direction of the handle as typified by the scrubbing method, and was a toothbrush having an excellent cleaning effect. .
  • the toothbrush of the prototype 2 is compared with the comparative product CDE.
  • This is not to increase the absolute value of the repulsion force, but to increase the repulsion force in the longitudinal direction of the handle by changing the distribution of the repulsion force acting in the longitudinal direction and width direction of the handle.
  • the cleaning effect can be enhanced without increasing irritation to tissues in the oral cavity. This also confirms that the toothbrush of this example is a toothbrush extremely suitable for the scrubbing method.
  • the prototype 2 toothbrush (the comparative CDE is the same in this regard)
  • both ends of the handle of the hair bundle in the longitudinal direction are formed into streamlined curved tops, and the width is adjusted.
  • the teeth can be made narrower, and the teeth can be brought into contact with the narrow top of the curve, so that the contact resistance at the start of contact with the teeth can be reduced.
  • the monofilaments at both ends in the longitudinal direction of the handle of the bristle bundle can easily enter between the teeth, and this can increase the repulsive force of the monofilaments, thereby further improving the cleaning effect. Contribute to higher.
  • the toothbrush of this embodiment uses an oval-shaped flocking hole, a portion between the flocking table and an adjacent flocking hole is unlikely to cause a trapezoidal crack. There is no fear of cracking. Therefore, in the toothbrush of this embodiment, as shown in FIG. 30, a flat line can be driven along the longitudinal direction of the flocking hole at the center in the width direction of the flocking hole extending in the longitudinal direction of the handle. As shown in Fig. 33, the hair bundles can be implanted symmetrically at the center in the width direction of the implanted holes, so that the density of the monofilaments located on both sides of the flat line can be made uniform. Therefore, all of the monofilaments can be directed almost perpendicularly to the flocked surface, the hair can be made good, and a good-looking toothbrush can be provided.
  • the present inventors conducted a test to determine how the difference in the flocking hole shape, the cross-sectional shape of the monofilament, and the difference in the driving direction of the flat wire affected the hairiness (appearance) of the monofilament. Appearance) was evaluated. Table 5 shows the test results.
  • a to f are conventional toothbrushes
  • g is the toothbrush according to the present embodiment
  • h is the same as the above g
  • the driving direction of the flat wire is the longitudinal direction of the handle. This is an example of tilting by 15 ° with respect to. (Table 5)
  • the toothbrush of the present invention can provide a difference in the repulsive force of the bristle bundle in the longitudinal direction and the lateral direction of the flocking hole because the flocking hole has a substantially elliptical shape or a substantially rectangular shape.
  • the brushing effect can be enhanced by adjusting the direction of the movement.
  • controlling the inclination direction can also increase the brushing force in a specific direction.
  • the flocking hole itself is inclined, even if the pressing force accompanying the brushing operation repeatedly acts, the inclined posture does not collapse, and a stable brushing force can be obtained over a long period of time.
  • a toothbrush that improves both detailed cleaning of interdental, cervical and occlusal surfaces and cleaning of smooth surfaces on tooth surfaces Can be obtained.
  • the monofilaments located at both ends in the longitudinal direction of the flocking hole which can reduce the contact resistance at the start of contact with the teeth because the bristle bundle can be streamlined and are narrow Can easily enter between the teeth, and the cleaning effect can be further enhanced.
  • the bristle bundles planted in the flocking holes support each other to reinforce the bristle, and the tips converge. Therefore, it is possible to provide a toothbrush capable of penetrating into details between teeth, the cervix, and the occlusal portion, and for strongly removing the food residue and the teeth accumulated at these sites.
  • the pressing force between the teeth, the cervix and the occlusal surface will be appropriate, and the degree of convergence of the hair bundle tip will also be appropriate.
  • a toothbrush excellent in insertability between teeth and the like can be obtained.
  • the monofilament constituting the hair bundle implanted in the flocking hole has a rectangular cross-section and the long side direction in the cross-sectional shape is along the longitudinal direction of the flocking hole, the monofilament with respect to the longitudinal direction of the flocking hole
  • the repulsive force of the toothbrush can be increased, and the cleaning power of the toothbrush can be further increased.
  • the cross-sectional area for obtaining the same repulsive force is smaller than that of a monofilament having a circular cross section, so that there is less stimulation to the oral tissues.
  • the tip of each hair bundle is processed into a mountain-cut shape, the detail cleaning property is further improved.
  • fine cleaning in the handle width direction and fine cleaning in the handle width direction are possible. The nature also increases.
  • At least the convergence blocks are provided at the front end and the rear end of the handle in the longitudinal direction of the handle, and the convergence blocks of the next row are provided behind the gap formed between the convergent blocks arranged in the front row in the handle longitudinal direction.
  • the convergence block in the front row is polished, the portion left behind by the convergence block in the front row will be polished by the convergence block in the next row. Can be polished over its entire area.
  • the smooth surface can be polished efficiently, but in the mouth. The operability does not decrease.
  • the short side of the substantially rectangular flocked hole is set to 0.8 to 2.0 bandits, and the long side is set to 1.5 to 5.0 haze.
  • the size of the tip of the convergent portion formed by the leaning is the most suitable for achieving both smoothness cleaning and detail cleaning.
  • the angle of inclination of the bristle bundle forming the convergence block is in the range of 2 to 10 °.
  • the distance is set to 0.2 to 4.0 awake, it is possible to prevent the convergent shape from being broken even during long-term use.
  • Five rows of bristle bundles are provided in the longitudinal direction of the flocking table, one converging block at the center of the bristle bed width direction in the first and fifth rows, and the center of the flocking table width direction in the second and fourth rows.
  • one converging block is placed at the center in the width direction of the flocking table, and the outer side of the converging block is in the same direction as the hair bundle forming the converging block.
  • one bundle of independent hair bundles is arranged, each of which is inclined at an angle where the tip does not touch the convergence block, the target site is cleaned by the first row of convergence blocks after the front surface in the traveling direction is cleaned.
  • the hair bundles on the both sides in the width direction constituting the second row are separated by passing over the hair bundles, and both sides are brushed by the hair bundles in the second row, and the front face is applied to the third row.
  • the same state from the third row to the fourth row It means that repeated even when moving to, toothbrush high cleaning effect is obtained.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Brushes (AREA)

Abstract

L'invention porte sur une brosse à dents dont on a amélioré les propriétés de nettoyage des parties entre les dents sans porter préjudice aux propriétés de nettoyage des surfaces lisses. Dans un premier aspect, l'invention porte spécifiquement sur une brosse à dents destinée à améliorer les propriétés de nettoyage des parties entre les dents et dont la solidité permet de conserver ces propriétés, et dans un second aspect, sur l'excellente esthétique et solidité de la brosse. Dans la réalisation du premier aspect, les trous accueillant les touffes de poils formés dans une tête bloc sont de forme ovale ou rectangulaire, approximativement, et des monofilaments de section rectangulaire sont utilisés pour améliorer les propriétés de brossage. Dans la réalisation du second aspect, on fait appel à un procédé permettant de tracer des lignes parallèles de sorte que les trous accueillant les touffes soient décalés afin que ces lignes parallèles ne reposent pas sur une ligne linéaire.
PCT/JP1999/002469 1998-05-13 1999-05-12 Brosse a dents WO1999058019A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99919556A EP1080663A1 (fr) 1998-05-13 1999-05-12 Brosse a dents
CA002331186A CA2331186A1 (fr) 1998-05-13 1999-05-12 Brosse a dents

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP10/130818 1998-05-13
JP13081898A JP3813734B2 (ja) 1998-05-13 1998-05-13 歯ブラシ
JP11006923A JP2000201739A (ja) 1999-01-13 1999-01-13 歯ブラシ
JP11/6923 1999-01-13

Publications (1)

Publication Number Publication Date
WO1999058019A1 true WO1999058019A1 (fr) 1999-11-18

Family

ID=26341147

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/002469 WO1999058019A1 (fr) 1998-05-13 1999-05-12 Brosse a dents

Country Status (6)

Country Link
EP (1) EP1080663A1 (fr)
KR (1) KR100581613B1 (fr)
CN (1) CN1148131C (fr)
CA (1) CA2331186A1 (fr)
ID (1) ID28002A (fr)
WO (1) WO1999058019A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD753922S1 (en) 2013-12-16 2016-04-19 Colgate-Palmolive Company Toothbrush
USD764175S1 (en) 2013-12-16 2016-08-23 Colgate-Palmolive Company Toothbrush
USD764805S1 (en) 2013-12-16 2016-08-30 Colgate-Palmolive Company Toothbrush
USD765984S1 (en) 2013-12-16 2016-09-13 Colgate-Palmolive Company Toothbrush
USD765986S1 (en) 2013-12-16 2016-09-13 Colgate-Palmolive Company Toothbrush
JP2021007554A (ja) * 2019-06-28 2021-01-28 サンスター株式会社 歯ブラシ

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7934284B2 (en) * 2003-02-11 2011-05-03 Braun Gmbh Toothbrushes
EP1800562A1 (fr) * 2005-08-24 2007-06-27 Curaden International AG Systeme de brosses

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934209A (ja) * 1982-08-20 1984-02-24 岡崎　健一 歯ブラシ
JPS62106523U (fr) * 1985-12-23 1987-07-07
JPH09502110A (ja) * 1993-09-02 1997-03-04 リングナー＋フィッシャー・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 歯ブラシについての剛毛配列

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934209A (ja) * 1982-08-20 1984-02-24 岡崎　健一 歯ブラシ
JPS62106523U (fr) * 1985-12-23 1987-07-07
JPH09502110A (ja) * 1993-09-02 1997-03-04 リングナー＋フィッシャー・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 歯ブラシについての剛毛配列

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD753922S1 (en) 2013-12-16 2016-04-19 Colgate-Palmolive Company Toothbrush
USD764175S1 (en) 2013-12-16 2016-08-23 Colgate-Palmolive Company Toothbrush
USD764805S1 (en) 2013-12-16 2016-08-30 Colgate-Palmolive Company Toothbrush
USD765984S1 (en) 2013-12-16 2016-09-13 Colgate-Palmolive Company Toothbrush
USD765986S1 (en) 2013-12-16 2016-09-13 Colgate-Palmolive Company Toothbrush
JP2021007554A (ja) * 2019-06-28 2021-01-28 サンスター株式会社 歯ブラシ

Also Published As

Publication number Publication date
KR20010071168A (ko) 2001-07-28
CA2331186A1 (fr) 1999-11-18
KR100581613B1 (ko) 2006-05-22
CN1299245A (zh) 2001-06-13
EP1080663A1 (fr) 2001-03-07
ID28002A (id) 2001-05-03
CN1148131C (zh) 2004-05-05

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