JP2000175744A - Toothbrush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toothbrush heightening brushing effect in a brushing method using the tip part (toe) and rear end part (heel) of the toothbrush and preventing the damage of soft tissue of a gum and the like. SOLUTION: In a toothbrush with bristling holes of different hole diameters bored, a bristling part 3 is divided in three zones which are a tip part A, a center part B and a rear end part C, along the longitudinal direction of the toothbrush, and the hole diameters Da, Dc of bristling holes 4a, 4c of the tip part A and rear end part C are made larger than the hole diameter Db of bristle bristling holes 4b of the center part C. The stiffness of brush bristle of the tip part and rear end part can be made hard, and the stiffness of brush bristle of the center part can be made soft. Tooth filth removing effect can therefore be heightened in the case of brushing the last parts (centrifugal parts) of back teeth using the tip part and in the case of brushing the back side of front teeth using the rear end part. Moreover, force is moderately absorbed by the soft brush bristle of the center part. Force applied to the tip part or rear end part is therefore suppressed to prevent the damage of soft tissue of a gam and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enhances the brushing effect when brushing teeth using the front end (toe) and rear end (heel) of a toothbrush, and has no risk of damaging soft tissues such as gums. Related to toothbrush.

[0002]

2. Description of the Related Art In order to remove plaque, it is necessary to increase the total amount of force applied to a brush. However, if it is too strong, it may damage soft tissues such as gums, which is not preferable in use. Means for increasing the force applied to the brush include increasing the thickness of the brush, increasing the number of brushes, and shortening the length of the brush, all of which must take into account soft tissues such as gums. Must. As a toothbrush that has solved such a problem, Utility Model Registration No. 25
No. 48396.

[0003] In this toothbrush, the leading end side of the flocking table is formed into a rounded tapered portion, and three large-diameter holes having a diameter larger than a flocking hole formed behind the tapered portion are formed at the end of the tapered portion. With the tip position as one vertex, three points are arranged at each vertex position of the triangle set in the taper.

[0004]

However, in the case of a toothbrush in which three large-diameter holes are arranged, there is a problem in that the force is excessively concentrated in one of the leading holes. In addition, in order to ensure the durability as a toothbrush, the most advanced holes need the number of flocks of about two holes, but there is a concern that the gums may be damaged instead of increasing the durability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and enhances the brushing effect when brushing teeth using the tip (toe) and rear end (heel) of the toothbrush. Another object of the present invention is to provide a toothbrush that does not damage soft tissues such as gums.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a toothbrush in which flocked holes having different hole diameters are drilled.
It is divided into three regions of a central portion and a rear end portion, and the diameter of the flocking hole at the front end portion and the rear end portion is larger than the diameter of the flocking hole at the central portion.

In such a configuration, the bristle of the brush at the front end and the rear end can be strengthened, and the bristle of the brush at the center can be softened. The plaque removal effect can be enhanced when the last part (distal part) of the back teeth is polished or the back side of the front teeth is polished using the rear end part (heel). In addition, since the brush at the central portion of the bristle is capable of appropriately absorbing the force and suppressing the force applied to the leading end portion and the trailing end portion, the feeling of contact with the gingiva and the like are improved. For this reason, the soft tissue such as the gingiva is not damaged even though the brushing effect is high.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a head section according to the first embodiment of the present invention. For easy understanding, only a part of the brushes implanted in each of the flocked holes is hatched, and most of the flocked holes are not shown.

In the figure, 1 is a head, 2 is a head 1
A neck portion 3 connecting the handle and a handle portion (not shown) is a flocked portion. In the case of the present invention, the flocked portion 3 is divided into three regions along the longitudinal direction of the brush, namely, a front end portion A, a center portion B, and a rear end portion C, and the flocked holes 4a, 4a of the front end portion A and the rear end portion C are provided.
c, the hole diameters Da and Dc are the hole diameters D of the flocking holes 4b in the central portion B
It is designed to be larger than b. In actually manufacturing the toothbrush according to the present invention in accordance with such conditions, these flocked holes 4a, 4b and 4c are formed as holes having a shape satisfying any of the following conditions 1 to 4. is there.

(Condition 1) (1) The diameter ratio Da: Db of the hole diameter Da of the flocking hole 4a of the tip portion A to the hole diameter Db of the flocking hole 4b of the central portion B is 1.
5 to 3.2 and the hole diameter D of the flocking hole 4c at the rear end portion C
c to the diameter Db of the flocking hole 4b of the central portion B
c: Db is 1.5 to 3.2. (2) Da = 1.8 to 2.5 mm, Db = 1.4 to
1.8 mm, Dc = 1.8 to 2.5 mm.

(Condition 2) (1) The area of one hole of the flocking hole 4a at the tip end portion A is S
a, the total hole area of all the flocking holes 4a formed in the tip end portion A is defined as ΣSa, one hole area of the flocking hole 4b of the central portion B is Sb, and all the flocking holes 4b formed in the central portion B Is the total hole area of 植 Sb, and the flocking hole 4 of the rear end portion C
Assuming that one hole area of c is Sc and the total hole area of all the flocking holes 4c formed in the rear end portion C is ΣSc, the total hole area Sac of the front end portion A and the rear end portion C (= ΣSa +
ΣSc) and the total hole area T (= 毛 Sa + Σ)
Sac: T is 0.37-
0.69, and the hole area ratio of the total hole area ΣSa of the tip portion AＡSa and the total hole area T of the entire flocked portionΣSa: T is 0.
21 to 0.38. (2) Da = 1.8 to 2.5 mm, Db = 1.4 to
1.8 mm, Dc = 1.8 to 2.5 mm.

(Condition 3) (1) A brush 5a implanted in the implanted hole 4a of the tip portion A
The total number of the brushes 5c to be implanted in the flocking holes 4c of the rear end portion C is Fb, and the total number of the brushes 5c to be implanted in the flocking holes 4b of the central portion B is Fb. When the total number of the entire rear end portion C is Fc, the front end portion A
And the total number Fa + Fc of the brushes 5a and 5c at the rear end portion C
The ratio (Fa + Fc) :( Fa + Fb + Fc) of the total number of brushes Fa + Fb + Fc to the total number of brushes of the entire flocked portion is 0.32 to 0.82, and the total number Fa of brushes at the tip end portion A, and the entire flocked portion Total number of brushes Fa + Fb +
The ratio of the number of brushes to Fc (Fa): (Fa + Fb + Fc) is 0.20 to 0.51. (2) Da = 1.8 to 2.5 mm, Db = 1.4 to
1.8 mm, Dc = 1.8 to 2.5 mm.

(Condition 4) In each of the above conditions 1 to 3, the brush 5b implanted in the implanted hole 4b of the central portion C
The thickness of the brush 5 implanted on the front end portion A and the rear end portion C
a, the same as or thinner than 5c.

The handle materials including the head 1 and the neck 2 include polystyrene resin (PS), polypropylene resin (PP), polyethylene terephthalate resin (PET), acrylonitrile butadiene styrene resin (ABS), and cellulose propionate. Resin (CP),
Polyarylate resin (PAR), polycarbonate resin (PC), acrylonitrile styrene resin (AS) and the like are used alone or in combination, but polypropylene is most preferable in terms of moldability, cost and the like.

Hair (filament) for planting as brush
Are polyesters such as polyethylene terephthalate and polybutylene terephthalate, nylon 6, nylon 66, nylon 6-10, and nylon 6-1.
2. Materials that can be melt-spun, such as polyamides such as nylon 12, polyolefins such as polyethylene and polypropylene, and polyvinyl halides such as polyvinylidene fluoride are used. Nylon is most preferred from the viewpoints of usability and durability.

At the time of flocking, when the total ratio of the cross-sectional area of the bristle to the hole area is 65% to 85%, the frictional resistance between the brush and the handle portion is large, and the phenomenon of hair loss hardly occurs. In addition, at such a ratio, there is no occurrence of cracks around the flocking hole due to the impact at the time of flocking,
It is preferable that the number of hair transplants be within the above range.

The length (hair length) of the implanted brush is in the range of 6 mm to 12 mm. From the viewpoint of usability and durability, it is more preferably 8 mm to 10 mm for adults, and for children. Is more preferably 6 mm to 8 mm.

The thickness of the brush is 5 mils (1 mil is 1/1000 inch) to 14 mils, and from 8 mils to 11 mils for adults, from the viewpoint of usability and durability. Mills are more preferred, and 6 to 8 mils are more preferred for children.

The toothbrush manufactured under the above-described conditions is used in brushing the teeth using the tip portion (toe) A and the rear end portion (heel) C of the toothbrush.
The plaque on the back side of the back teeth and the front teeth can be effectively scraped off by the brushes implanted on the rear end portion C. In addition, since the brush portion having a soft bristle exists in the central portion B, the force can be appropriately absorbed at this portion, and the force applied to the front end portion and the rear end portion can be suppressed. For this reason,
It does not damage soft tissues such as gums.

In the first embodiment, the number of flocked holes 4a at the front end portion A is 5, the number of flocked holes 4b at the center portion B is 16, and the number of flocked holes 4c at the rear end portion C is five. Has been exemplified, but the present invention is not limited to this. For example, as another embodiment, 5 holes (tip portion A
No. of flocking holes 4a) +16 holes (flooring holes 4b of central portion B)
No.) + 3 holes (the number of flocking holes 4c at the rear end portion C) (FIG. 2), 3 holes + 20 holes + 3 holes (FIG. 3),
1 hole + 20 holes + 3 holes (FIG. 4), 1 hole + 16 holes + 1 hole, and the flocked hole 4a at the front end portion A has a cutout elliptical shape, and the flocked hole 4c at the rear end portion has an elongated hole shape. (FIG. 5), 5 holes + 12 holes + 3 holes, and the flocking hole 4b of the central portion B having an elliptical shape (FIG. 6).

[0021]

EXAMPLES (Example 1) Specific numerical examples of toothbrushes satisfying the condition 1 are shown below. (1) Example of diameter ratio Da: Db = 1.5 Da = 2.1 mm, Db = 1.4 mm (2) Example of diameter ratio Da: Db = 3.2 Da = 2.5 mm, Db = 1.4 mm

(Embodiment 2) Specific numerical examples of toothbrushes satisfying Condition 2 are shown below. (1) Example of hole area ratio Sac: T = 0.37 φ2.2 mm · 5 holes + φ1.8 mm · 20 holes + φ2.2
mm / 3 holes (2) Example of hole area ratio Sac: T = 0.69 φ2.5 mm / 5 holes + φ1.4 mm / 16 holes + φ2.5
mm · 6 holes (3) Example of hole area ratio ＴSa: T = 0.21 φ2.0 mm · 5 holes + φ1.6 mm · 20 holes + φ2.0
mm · 6 holes (4) Example of hole area ratio ΣSa: T = 0.38 φ2.5 mm · 5 holes + φ1.4 mm · 16 holes + φ2.5
mm / 3 holes

(Embodiment 3) Specific numerical examples of toothbrushes satisfying the condition 3 are shown below. (1) Brush number ratio (Fa + Fc): (Fa + Fb + F
c) = 0.32 example 2.2mm / 5 holes (37 hairs per hole for 8 mils)
+ Φ1.8mm ・ 20 holes (31 hairs for 7 mils per hole) + φ2.2mm ・ 3 holes (37 hairs for 8 mils per hole) (2) Brush number ratio (Fa + Fc): (Fa + Fb + F)
c) = 0.82 example φ2.5mm / 5 holes (58 mil hairs per hole 58 pieces)
+ Φ1.4mm / 16 holes (8 mil bristles 14 per hole) + φ2.5mm / 6 holes (8 mil bristles 58 per hole) (3) Brush number ratio (Fa): (Fa + Fb + Fc) ) =
Example of 0.20 φ2.2mm / 5 holes (37 hairs per hole for 8 mils)
+ Φ1.8mm / 20 holes (7 mil bristles per hole 31) + φ2.2mm / 3 holes (8 mil bristles 37 per hole) (4) Brush number ratio (Fa): (Fa + Fb + Fc) ) =
Example of 0.51 φ2.5mm, 5 holes (58 mil hairs per hole, 58 each)
+ Φ1.4mm / 16 holes (8 mil hairs 14 holes per hole) + φ2.5mm / 6 holes (8 mil hairs 58 holes per hole)

(Embodiment 4) Specific numerical examples of toothbrushes satisfying Condition 4 are shown below. (1) The thickness of the brush to be implanted in the implanted hole 4b of the central portion B = 7
Mill (2) Flocked holes 4a, 4c in front end portion A or rear end portion C
The thickness of the brushes 5a and 5c to be implanted on the surface = 8 mils

Next, the results of the actual use test of the toothbrush of the present invention are shown below. Total number of testers: N = 30 Usage period: 1 week Evaluation method: 7-step absolute evaluation

(1) Specification of toothbrush of product 1 of the present invention 5 holes (Da = 2.3 mm) +16 holes (Db = 1.6 m)
m) Using a toothbrush handle (head shape in FIG. 2) having +3 holes (Dc = 2.3 mm), a front end portion A and a rear end portion C
In the flocked holes 4a and 4c, 53 hairs of 7 mils are implanted in each hole.
The toothbrushes were planted with 24 holes at a time and the total hair length was cut to 10 mm, and then the bristles were rounded.

(2) Specification of toothbrush of product 2 of the present invention 5 holes (Da = 2.3 mm) +16 holes (Db = 1.6 m)
m) Using a toothbrush handle (head shape in FIG. 2) having +3 holes (Dc = 2.3 mm), a front end portion a and a rear end portion c
In the flocked holes 4a and 4c, 42 bristles of 8 mils are planted one by one, and in the bristled hole 4b of the central part b, 1 bristles of 7 mils are planted.
The toothbrush was planted with 24 holes in each hole, the hair length was cut to 10 mm, and the bristles were rounded.

(3) Specifications of the toothbrush of Comparative product 1 Using a 35-hole toothbrush handle (head shape in FIG. 7) in which all the flocking holes have a hole diameter of 1.6 mm, bristles of 8 mil were used in each flocking hole. Hair transplanted 19 holes per hole, hair length 10m
m and a toothbrush with rounded hair tips.

Using the above three types of toothbrushes, a usage test was conducted with a total of N = 30 testers, and a questionnaire survey was conducted on the feeling of use after one week of use. The results shown in Table 1 were obtained.

[0030]

[Table 1]

As is clear from the product 1 of the present invention in Table 1,
At the front end portion A and the rear end portion C, brushed holes 4a and 4b each having a hole diameter of 2.3 mm in which a bristle bristle is planted are arranged, and in the center portion B, a brush diameter of 1.6 mm in which a bristle bristle is planted is brushed. By arranging the flocking holes 4b, it is possible to demonstrate the power of plaque removal when using the toes to polish the rearmost part (distal part) of the back teeth or when using the heel to polish the back side of the front teeth. I understand.

Further, as is apparent from the product 2 of the present invention, when a brush having a thickness smaller than that of a brush planted on a toe or a heel portion at a central portion C, for example, a brush having a thickness of 7 mils with respect to a thickness of 8 mils is planted, It can be seen that the contact comfort and hardness are further improved.

Further, the effect of scraping plaque has a hole diameter of φ
It was confirmed that it was superior to the toothbrush having only 1.6 mm flocked holes B (Comparative product 1) (Product 1 of the present invention and Product 2 of the present invention), and it was confirmed that the contact with the gingiva was just right (the present invention). Article 2).

As described above, the toothbrush of the present invention is superior to the comparative product in all of the feeling of scraping plaque, the feeling of scraping plaque of the back teeth, and the feeling of scraping the back of the front teeth. Proven.

[0035]

As described above, according to the present invention,
In a toothbrush having a flocked hole having a different hole diameter, the flocked portion is divided into three regions along the longitudinal direction of the brush, a leading end portion, a central portion, and a trailing end portion. Is made larger than the diameter of the flocked hole in the central portion, so that in brushing the teeth using the leading end portion and the trailing end portion of the toothbrush, the brushing effect can be enhanced and the soft tissue such as gum can be prevented from being damaged.

[Brief description of the drawings]

FIG. 1 is a plan view of a head portion of a toothbrush according to a first embodiment.

FIG. 2 is a plan view of a head portion of a toothbrush according to a second embodiment.

FIG. 3 is a plan view of a head part of a toothbrush according to a third embodiment.

FIG. 4 is a plan view of a head portion of a toothbrush according to a fourth embodiment.

FIG. 5 is a plan view of a head part of a toothbrush according to a fifth embodiment.

FIG. 6 is a plan view of a head portion of a toothbrush according to a sixth embodiment.

FIG. 7 is a plan view of a head portion of a comparative toothbrush.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head 2 Neck part 3 Flooding part 4a Flooding hole at tip part 4b Flooding hole at center part 4c Flooding hole at rear end part 5a Brush planted at tip part 5b Brush planted at center part 5c Brushed at rear end part Brush A Tip area B Central area C Rear end area Sa Area of one implanted hole at the distal end area Sb Hole area of 1 implanted hole at the central area Sc Sc Area of one implanted hole at the rear end area Fa Fb Total number of brushes Fb Total number of brushes in entire central portion Fc Total number of brushes in entire rear end portion

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Eiichi Sekino 3-7-7 Honjo, Sumida-ku, Tokyo F-term in Lion Corporation (reference) 3B202 AA06 AB15 EA01 EC07 ED06

Claims (1)

[Claims] 1. A toothbrush having a flocked hole having a different hole diameter, wherein a flocked portion is divided into three regions along a longitudinal direction of the brush, namely, a front end portion, a center portion, and a rear end portion. A toothbrush characterized in that the diameter of the flocking hole is larger than the diameter of the flocking hole in the central part.