JP3547672B2 - toothbrush - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a toothbrush that is excellent in interdental penetration of a brush and at the same time has a high brushing feeling.
[0002]
[Prior art]
Japanese Utility Model Laid-Open No. 5-15834 discloses a toothbrush in which a brush 52 in which both ends 51 and 51 are tapered as shown in FIG. However, this toothbrush has a drawback that the brushing feeling is low due to the use of a tapered brush. If the brush diameter is increased to increase the brushing feeling, the fluff becomes too strong and the tip of the hair becomes There was a problem that pain occurred when hitting the gums.
[0003]
Japanese Patent Application Laid-Open No. 9-322821 discloses a toothbrush in which a brush 62 having a double-core structure having a plurality of protruding core hairs 61 as shown in FIGS. Has been. However, in the case of this toothbrush, since the tip of the protruding core bristles 61 is not sharpened, there is a disadvantage that the penetration property into the interdental portion is inferior.
[0004]
Furthermore, Japanese Patent Laid-Open Nos. 58-15812 and 60-88110 show toothbrushes in which a brush having a cross-sectional shape of a brush base having an irregular cross section is implanted. However, these toothbrushes have the same problem as the toothbrush described in Japanese Utility Model Publication No. 5-15834 because the brush tip side is not branched.
[0005]
[Problems to be solved by the invention]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a toothbrush that is excellent in interdental penetration of a brush and has a high feeling of brushing.
[0006]
To achieve the above object, the toothbrush of the present invention, using a brush made of three-leaf clover shaped cross-section, with branches the tips of both ends of the brush formed of the three-leaf clover cross-section into three respectively, each branch bristle A brush having a sharp taper shape is folded in half at the central portion thereof, and is then implanted on the hair transplantation surface of the head portion . In addition, it is preferable that the length of the said branched hair part shall be 1/2 or less of the brush height (hair length) after flocking.
[0007]
In the case of the toothbrush having the above-described configuration, the brush tip side is branched and each branched hair is tapered, so that the interdental penetration property of the bristles is excellent and at the same time the brushing feeling can be enhanced. Furthermore, since the hair tip can be made soft while the hair ends are soft, the occurrence of pain to the gingiva can be extremely reduced.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of the toothbrush of the present invention. 1 is a side view of a tip branch taper brush used in the toothbrush of the present invention, FIG. 2 (a) is an enlarged side view of a branch hair portion of the tip branch taper brush, and FIG. 2 (b) is a diagram in FIG. 2 (a). FIG. 2C is a cross-sectional view taken along the line CC in FIG. 2A, and FIG. 3 is a side view of the toothbrush head portion in which the tip branch taper brush is implanted.
[0009]
As shown in FIG. 1 and FIG. 2, the tip branch taper brush 1 used in the present invention branches the brush tip side into a plurality (three in the illustrated example) and sharpens each branch hair 2 into a taper shape. In the toothbrush according to the embodiment, as shown in FIG. 3, the tip branching taper brush 1 is formed by bending the toothbrushing surface of the toothbrush head portion 3 into two at the center thereof and implanting the hair. .
[0010]
In the case of the illustrated example, the cross-sectional shape of the branched hair 2 portion is a three-leaf clover type as shown in FIGS. 2 (a) and 2 (b). In order to make the tip branch taper brush 1 having such a shape, a plurality of filaments each having a three-leaf clover-shaped cross section are bundled to form a hair bundle, and the hair bundle has a predetermined length (for example, 25 to 25). Or about 35 mm), the tip is immersed in a hydrolyzing agent such as an aqueous caustic soda solution, or a hair bundle in which filaments of a predetermined length having a clover-shaped cross section are bundled is implanted in the toothbrush head portion 3 Then, the tip can be made by immersing the tip in the hydrolysis agent.
[0011]
As the material of the brush, polybutylene terephthalate resin, polyester resin, polyamide resin, or the like can be used, but polybutylene terephthalate resin is most desirable from the viewpoint of physical properties and cost.
[0012]
As shown in FIG. 3, the length h of the branched hairs 2 is ½ or less, preferably の or less of the brush height (hair length) H after flocking. Further, the base side sectional area of the tip branch taper brush 1 excluding the branch hair 2 is 0.002 to 0.005 mm ² , preferably 0.003 to 0.004 mm ² .
[0013]
The toothbrush using the tip branch taper brush 1 having the shape as described above, the brush tip side is branched into three, and each branch hair 2 has a sharp taper shape, so that it easily enters the interdental portion. can do. In addition, it is possible to increase the feeling of brushing without the hair and waist becoming weaker than necessary. Furthermore, since the hair tip can be made soft while the hair ends are soft, the occurrence of pain to the gingiva can be extremely reduced.
[0014]
In the above embodiment, the case where the number of leaves of the clover-shaped cross section is three is illustrated, but the number of leaves is not limited to three, and is shown in FIGS. 4 (a) to 4 (c). Thus, it can be set to any number such as 2 to 4 leaves. In view of manufacturing cost and usability, it is most desirable to use a three-leaf clover type.
[0015]
Further, the shape of each leaf of the clover-shaped cross section is not limited to the circular leaf as in the above-described embodiment, but is also a triangle, a rectangle (diamond), a ginkgo as shown in FIGS. Any other leaf shape such as a shape, a hollow clover-type cross section, etc. can be adopted.
[0016]
【The invention's effect】
As described above , according to the present invention, the both ends of the brush having a three-leaf clover-shaped cross section are branched into three, and each branched hair has a sharp tapered shape, so that it easily enters the interdental portion. can do. In addition, it is possible to increase the feeling of brushing without the hair and waist becoming weaker than necessary. Furthermore, since the hair tip can be made soft while the hair ends are soft, the occurrence of pain to the gingiva can be extremely reduced. In addition, since it is possible to effectively clean the gap between teeth and the periodontal pocket, which is difficult with a conventional toothbrush, it is suitable for the prevention and treatment of periodontal diseases.
[Brief description of the drawings]
FIG. 1 is a side view of a tip branch taper brush used in the toothbrush of the present invention.
2A is an enlarged side view of a branched hair portion of a tip branch taper brush, FIG. 2B is a cross-sectional view taken along the line BB in FIG. 2A, and FIG. 2C is a CC line in FIG. It is sectional drawing.
FIG. 3 is a side view of a toothbrush head portion in which a tip branch taper brush is implanted.
FIGS. 4A to 4H are diagrams showing examples of cross-sectional shapes of branched hair portions. FIGS.
FIG. 5 is a side view showing a first example of a conventional tapered hair.
6A and 6B show a second example of a conventional tapered hair, where FIG. 6A is a side view, and FIG. 6B is an enlarged side view of a tip portion.
[Explanation of symbols]
1 Tip branch taper brush 2 Branch hair 3 Toothbrush head

Claims (1)

Using a brush made of three-leaf clover shaped cross-section, with branches the tip of brush at both ends made of the three-leaf clover cross-section into three respectively, the brush in which the respective branch hairs with sharp tapered, its central portion A toothbrush characterized by being folded in half and flocked on the head flocking surface .

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