JPH07227318A - Tooth brush - Google Patents

Abstract

PURPOSE:To achieve higher effect of removing bacterial plaque from an interdental part and a dental neck part by a method wherein an outer circumferential row of bristle bundle is arranged in a figure of O or in a figure of U on a bristle base and a step is provided at the position of the tip of an outer circumferential row and the inner circumferential row of bristle bundles or a bristle part is specified in width. CONSTITUTION:An outer circumferential row of bristles 11 are arranged in a figure of O on a bristle base 1 while a step is provided between the bundles of the bristles so that the position of the tips of the bristles of the outer circumferential row of bristle bundles is higher than that of the tips of the bristles of the inner row of bristle bundles The width of a bristle part in the direction orthogonal to a neck part 3 is in a range of 5.0-7.0mm. The outer circumferential row of arranged enables the brushing of a dental neck part recessed in the alignment of teeth efficiently. When the bristle bundles 11 are arranged in a figure of O, the neck part recessed in the alignment of the teeth on a lower jaw can be brushed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothbrush. The present invention relates to a toothbrush that is easy to grip.

[0002]

2. Description of the Related Art As conventional techniques related to conventional toothbrushes, Japanese Utility Model Publication No. 47-8368 and Japanese Utility Model Publication No. 2-863 are available.
No. 24, Japanese Utility Model Publication No. 54-128668 and Japanese Utility Model Publication No. 49-112479 are known. The conventional technique described in the above publication is described in Japanese Utility Model Laid-Open No. 47-8368, which describes a "toothbrush that utilizes the strength of a strain produced by adding shortness to the length of a bristle". 2-86324 discloses "Inverse U
"Toothbrush for back toothbrushing"
Japanese Patent No. 28668 discloses "a toothbrush in which a flat plate portion is provided at the tip of a handle having a triangular cross section, and a brush is planted in the flat plate portion".
However, Japanese Utility Model Application Laid-Open No. 49-112479 discloses "a toothbrush having a shape in which the neck portion of the toothbrush is smoothly deflected upward".

[0003]

However, in all of the conventional toothbrushes described in the above-mentioned publications, the lips and teeth interfere with the plaque on the interdental part and the cervical part of the recessed part of the tooth arrangement. There is no effective removal. Therefore, a first object of the present invention is to provide a toothbrush which has a high effect of removing plaque on the interdental part and the cervical part of the recessed part of the tooth arrangement and which can be used without being disturbed by the lips and teeth. . Also,
A second object of the present invention is to achieve the first object more effectively and to provide a toothbrush that is easy to grip when brushing teeth.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a bristle bristle bed 1 on which a plurality of bristle bundles are planted, a grip portion 2, and a neck portion 3 for connecting the bristle bristle board 1 and the grip portion 2 together. In the toothbrush, the bristle bundles 11 in the outer peripheral row are planted on the flocking table 1 so as to be O-shaped, or the bristle bundles 11 in the outer peripheral row except for the central portion near the neck 3 are U-shaped. And the step d is provided between the bristle bundles so that the positions of the bristle tips of the bristle bundles 11 in the outer peripheral row are higher than the positions of the bristle tips of the other bristle bundles (the bristle bundles in the inner row) 12. In addition, the width D of the flocked portion in the direction orthogonal to the neck part 3 is in the range of 5.0 to 7.0 mm, and the neck part 3 is inclined at an angle α to the opposite side with respect to the flocked surface 13. By providing a toothbrush characterized by being It is obtained by achieving the first object described above.

Further, in the toothbrush of the present invention, at least a portion of the grip portion 2 near the center thereof to the neck portion 3 has a cross section of a substantially isosceles triangle, and a bottom side 21 of the isosceles triangle has the flocking base 1 It is formed so as to be substantially parallel to the flocked surface 13 and is inclined to the same side with respect to the surface 23 including the bottom side 21 of the isosceles triangle of the grip portion 2, thereby achieving the second object. To be done.

[0006]

According to the toothbrush of the present invention, the bristle bundles 11 in the outer peripheral row are planted in the O-shape or the U-shape on the flocking table 1, and the bristle bundles 11 in the outer peripheral row are bristled. The step d is provided between the bristle bundles so that the tip position is higher than the bristle bundles 12 in the inner row, and the width D of the flocked portion in the direction orthogonal to the neck 3 is 5 Since the range is from 0.0 to 7.0 mm, the bristles can surely enter the interdental part and the cervical part of the recessed part of the tooth arrangement during use.

Since the neck portion 3 is inclined to the side opposite to the hair-implanted surface 13, even when the hair-implantation base 1 reciprocates or rotates about the grip portion 2 during use, There is a distance between the neck 3 and the lips and teeth, and it is difficult to interfere.

Further, at least a portion of the grip portion 2 near the center thereof near the neck portion 3 has a cross section of a substantially isosceles triangle, and the bottom side 21 of the isosceles triangle has the flocked surface 1
Since it is formed so as to be substantially parallel to 3, the thumb pad is put on the surface 23 and the grip portion 2 is held by the entire palm or the thumb pad is put on the surface 23 at the time of use. It is possible to easily and accurately correspond the usage angle and the like of the gripping portion 2 to the target site for tooth brushing by holding the side surface of the belly / middle finger with a knife or fork.

Furthermore, since the bristle tips of the bristles are spherically shaped, they are gently polished without damaging the weakened gums in the recessed part of the row of teeth that are not normally well-polished (the tips of the bristles do not reach and are not massaged). You can

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the toothbrush of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the toothbrush of the present invention. FIG. 1 is an enlarged perspective view showing a main part thereof, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is A of FIG. -A
FIG. 5 is an enlarged end view of the line cutting section, and FIG. 5 is an enlarged end view of the line cutting section of FIG. 6 is a perspective view showing a part of the alignment of teeth, FIG.
8 and FIG. 8 are explanatory views of one usage pattern according to the above embodiment.

In the toothbrush of this embodiment, as in the case of a normal toothbrush, as shown in FIGS. 1 to 3, the bristle implant base 1 in which a plurality of bristle bundles are planted, the grip portion 2, It is formed from the above-mentioned neck portion 3 connecting the flocking table 1 and the grip portion 2.

As shown in FIGS. 1 to 4, the toothbrush of this embodiment has a bristle bundle 11 in the outer peripheral row which is planted in a U shape on the bristle implant table 1, Further, the step d is provided between the bristle bundles so that the position of the bristle tips of the bristle bundles 11 in the outer peripheral row is higher than the position of the bristle tips of the bristle bundles 12 in the inner row, and the direction orthogonal to the neck portion 3 is provided. The width D of the above-mentioned flocked part is in the range of 5.0 to 7.0 mm. Since the bristle bundles 11 in the outer peripheral row are planted so as to have a U shape and the step d is provided, the neck portion (between the teeth and the gum) of the recessed portion of the tooth arrangement can be efficiently polished. You can If the bristle bundles 11 in the outer peripheral row are planted so as to be O-shaped, it is possible to polish the neck portion of the depressed portion of the row of teeth of the lower jaw without turning the toothbrush upside down. The width D of the flocked portion is 7.0.
If it exceeds 5.0 mm, it is difficult to make sure that the bristle tip does not easily enter the recessed portion even if the toothbrush is applied to the tooth brush when brushing the recessed portion of the tooth arrangement, and it is planted as less than 5.0 mm. The entire bristles bundle tend to fall over and are not stable, making effective plaque removal difficult. The width of the flocked portion in the longitudinal direction is preferably in the range of 10.0 to 25.0 mm.

Further, as shown in FIGS. 1 to 3 and 5, the grip portion 2 has a cross section of at least an isosceles triangle at least at a portion from the approximate center to the neck portion 3 and the isosceles triangle. The base 21 is formed so as to be substantially parallel to the flocked surface 13. As shown in FIGS. 1 and 3, the neck portion 3 is inclined to the opposite side with respect to the flocked surface 13, and with respect to the surface 23 including the bottom side 21 of the isosceles triangle of the grip portion 2. Are tilted to the same side.

The toothbrush of this embodiment will be further described. As shown in FIGS. 2 and 4, the bristle bundle is planted with 20 holes on the flocking table 1 having a flat surface. A bristle bundle is planted in each of the holes. The bristle 11 in the outer peripheral row, which is planted so as to have a U-shape, is planted in the lateral direction of the tip of the flocking table 1 2
Formed by a bristle bundle row a consisting of a set of long bristle bundles 11 and 6 pairs of bristle bundle rows b and b consisting of 6 pairs of long bristle bundles 11 which are planted on both sides in the longitudinal direction of the above-mentioned flocking table 1. Has been done. The bristle bundle 12 in the inner row is formed by a bristle bundle row c composed of 6 sets of short bristle bundles 12 which are planted in the center of the flocking table 1 in the longitudinal direction. A spherical portion is formed at the tip of the bristles forming the bristle bundles 11 and 12.

The bristle bundles 11 in the outer peripheral row (the bristle bundle row a and the bristle bundle row b in this embodiment,
The step d between the position of the bristles of b) and the position of the bristles of the bristle bundle 12 in the inner row (the bristle bundle row c in the present embodiment) ensures that the bristle bundles 11 in the outer row are bristles. From the viewpoints that the tooth surface of the recessed portion of the tooth arrangement is made to enter the interdental part and the neck portion of the tooth and the brush surface 12 of the inner row improves the cleaning ability of the tooth surface of the recessed portion of the tooth arrangement.
It is preferably in the range of 5 to 1.5 mm. Further, the length of the bristle bundle (long bristle bundle) 11 in the outer peripheral row is preferably in the range of 9.0 to 11.0 mm, and the length of the bristle bundle (short bristle bundle) 12 in the inner row Is preferably in the range of 8.0 to 10.0 mm.

Further, as shown in FIG. 5, the grip portion 2 has a substantially equilateral triangular cross section in which a portion near the neck portion 3 from the substantial center thereof is rounded, and is shown in FIGS. 1 to 3. As described above, the base 21 of the regular triangle is formed so as to be substantially parallel to the flocked surface 13. The cross section is the neck 3
And a plurality of non-slip projections 22 are provided on the surface of the grip portion 2 near the neck portion 3 corresponding thereto.

Further, as shown in FIGS. 1 and 3, the neck portion 3 is joined to the flocking table 1 by being inclined at an angle α to the opposite side to the flocking surface 13 and is the same as the front surface 23. It is connected to the grip portion 2 with an angle β inclined to the side. By providing the angles α and β, the angle α is in the range of 5 to 10 ° from the viewpoint of providing a distance between the neck 3 and the lips and teeth to prevent interference when brushing teeth. Is preferable, and the angle β is preferably in the range of 5 to 10 °. When the angles α and β are in the above range, the length of the neck portion 3 is preferably in the range of 30.0 to 50.0 mm.

The material of the bristles is not particularly limited as long as it is a material used for bristles of ordinary toothbrushes, and examples thereof include nylon, PET (polyethylene terephthalate resin), ABS (acrylonitrile butadiene styrene resin), PBT (polybutylene terephthalate), AS (acrylonitrile-styrene resin), PP (polypropylene resin), thermoplastic elastomer, etc. can be conveniently used.

The material of the grip portion 2 and the neck portion 3 is not particularly limited, but may be any material used for a grip portion of a normal toothbrush, such as ABS, PBT, AS,
PP, PC (polycarbonate resin), thermoplastic elastomer, propionate, etc. can be conveniently used.

The toothbrush of this embodiment is constructed as described above, and as shown in FIG. 7, at the time of brushing the interdental portion of the recessed portion of the tooth arrangement and the tooth neck as shown in FIG. When the toothbrush is applied to the vertical, the bristle bundles 11 in the outer peripheral row, which are planted in a U shape, correspond to the tooth and the gum in the recessed portion and between the teeth, and the width D of the flocked portion is the recess. Since the bristle bundle 12 in the inner row does not bulge on the tooth surface due to the step d, as shown in FIG. You can surely get in. As a result, the toothbrush of the present embodiment is capable of reliably polishing the interdental part and the cervical part of the recessed portion as compared with the conventional toothbrush, and is excellent in the plaque removal effect.

Further, in the toothbrush of this embodiment, since the grip portion 2 has a cross section of a substantially isosceles triangle, particularly a substantially equilateral triangle, when the toothbrush is gripped, the belly of the thumb is placed on the surface 23. When the entire gripping portion 2 is gripped by the entire palm with the first joint (or second joint) of the index finger along the ridge line on the side opposite to the surface 23, the shape of the hand and the finger is matched and the grip is very gripped. Even if you brush the toothbrush sideways and brush the fine part of the front tooth, put your thumb belly on the surface 23 and attach the belly of the index finger and the side of the middle finger to the other two sides and hold a knife or fork. The above-mentioned cross section has a very convenient shape for gripping.

Further, the toothbrush of this embodiment has the neck 3
Is inclined to the opposite side with respect to the flocked surface 13 and is inclined to the same side with respect to the surface 23, so that the flocked table 1 reciprocates and rotates about the grip portion 2 as an axis. However, since there is a distance between the neck portion 3 and the lips and teeth, it is difficult to interfere with each other, and the back side of the teeth and the surface of the back teeth are not disturbed by the lips and teeth.

In the toothbrush of this embodiment, the bristle bristle tips are processed into a spherical shape, so that the weakened gums in the recessed part of the row of teeth that are not usually well-polished (the tips are not massaged) Can be brushed, does not irritate and does not damage the gums. Further, the step d is also excellent in the ability to clean the surface of the tooth in the recessed portion of the bristle bundle 12 in the inner row.

The above-mentioned thumb / index finger of the grip portion 2
Since the non-slip protrusions 22 are provided on the portion corresponding to the middle finger, the hands and fingers get wet when brushing teeth, and the hands and fingers that want the toothpaste to grip the neck 3 become slippery. Even in the case, the tooth can be brushed by reliably gripping the grip part 2.

Further, as another embodiment of the present invention, an embodiment having exactly the same configuration as the above embodiment except that the bristle bundles 11 of the outer peripheral row are planted in an O shape in the above-mentioned embodiment is given. To be That is, this other embodiment is shown in FIGS.
The three bristle bundles near the neck 3 of the embodiment shown in the figure are changed to two long bristle bundles 11 and
A set of long bristle bundles 11 is arranged and planted in the same manner as the bristle bundle row a consisting of two pairs of bristle bundles which are planted in the short side direction of the tip of the flocking table 1, and the bristle bundles of the outer peripheral row are arranged. 11 is formed in an O-shape, and the above-mentioned flocked portion is configured by a total of 19 sets of bristle bundles.

The present invention is not limited to the above embodiment. That is, the bristle bundles 11 in the outer peripheral row may be planted in an O shape, and the bristle bundles 11 in the outer peripheral row and the bristle bundles 12 in the inner row may be formed by changing the lengths of the bristles constituting them. Although the step d is provided, a step may be provided at the tip of the bristle bundle by providing a step on the flocked surface 13 by using a bristle bundle composed of bristles of the same length.

The number of bristle bundles was set to 20 in the embodiment shown in FIGS. 1 to 3, but the number can be changed without departing from the spirit of the present invention. For example, in the embodiment shown in FIGS. 1 to 3, the bristle bundle row a is composed of two sets of bristle bundles in the lateral direction of the tip of the flocking table 1, and each is composed of six sets of bristle bundles in the longitudinal direction. Although three rows of bristle bundle rows b, c, b are planted, the number of bristle bundle rows, the number of bristle bundle rows, etc. may be appropriately changed.

That is, each of the bristle bundle rows b, c, b of the embodiment shown in FIGS. 1 to 3 may be composed of 7 sets of bristle bundles, so that a total of 23 sets of bristle bundles may be formed. In the embodiment shown in FIGS. 1 to 3, two sets of long bristle bundles 11 are further planted outside the three sets of bristle bundles closest to the neck portion 3 to form the bristle bundles 11 in the outer peripheral row. It may be planted in an O-shape and configured with a total of 22 sets of bristles. Further, the anti-slip projections 22 provided on the grip portion 2 may be provided with a plurality of hemispherical projections instead of the shape shown in the drawing, and may be recessed portions instead of projections.

[Test Example] In order to show the effect of this example,
Using the three types of toothbrushes (present invention product, comparative products 1 and 2) shown in the following [Table 1], the plaque removal rate of the recessed part of each tooth arrangement was measured by the following [measuring method of plaque removal rate]. Then, the easiness of polishing the recessed part of the tooth arrangement was evaluated by the following [Evaluation method of easiness of polishing], and the results are shown in [Table 2] below. The product of the present invention has the same form as the embodiment shown in FIGS. 1 to 3, and the comparative products 1 and 2 are the length of the bristle bundle in the inner row or the bending angle of the neck of the product of the present invention. Is changed to the length and angle shown in the following [Table 1].

[Measurement method of plaque removal rate] Having a clinically normal dentition without gingival retraction or tooth movement 1
Eight males and females aged 9 to 36 (who had no dental prosthesis and had no filling or caries) were used as test subjects. In advance, the test subjects were instructed to brush the recessed part of the tooth arrangement by brushing the toothbrush against the vertical surface as shown in FIG. 7, and the designated toothbrush (the present invention product, comparative products 1 and 2) was used. I got them used for one week so that they could get used to them. Oral cleaning was stopped on the day before the test, and during that period, sucrose solution was squeezed three times with a 15% sucrose solution. The plaque was removed by the brushing method (a method in which the subject brushes with a toothbrush) which the subject is constantly brushing. As shown in FIG. 9, the amount of plaque is obtained by dividing the tooth in the recessed part of the tooth arrangement into five parts and dividing the teeth into areas e to i as shown in the figure. The total height (mm) of the plaque from the gingival margin of the area is used as the amount of plaque, and the cervical part is evaluated by the teeth from the gingival margin of the areas f, g, and h in the figure. The total plaque height (mm) is used as the amount of plaque, and the total dental plaque height (mm) from the gingival margin in the areas e to i in the figure is used to evaluate the entire tooth. Used as the amount of The plaque removal rate is based on the following formula for the whole tooth,
It was determined for the interdental and cervical areas. Dental plaque removal rate (%) = [1- (plaque amount after brushing /
Amount of dental plaque before brushing)] × 100

[Evaluation Method of Ease of Polishing] There were 50 test subjects, and the invented product and comparative products 1 and 2 were evaluated for the easiness of polishing the recessed portions of the respective tooth arrangements by the following five-grade evaluation. 1. Easy to polish 2. Easy to polish 3. I can't say either 4. Slightly difficult to polish 5. Hard to polish From the above comparison results, 1. Easy to polish 2. The ratio of the total number of people who answered that it was slightly easy to polish was defined as the ratio of ease of polishing.

[0032]

[Table 1]

[0033]

[Table 2]

From the results shown in Table 2 above, the product of the present invention has a plaque removal rate of about 20 to 30 as compared with the comparative product 1.
% (The effect of arranging the bristle bundles 11 in the outer peripheral row to be O-shaped or U-shaped and the position of the bristle bundles 11 in the outer peripheral row are different from those of other bristle bundles 1).
The effect of providing the step d between the bristles so as to be higher than the position of the bristle tip 2), and in the example of the present application, the number of people who answered that it was easier to polish was increased by 32%. (Effect of bending the neck 3 by inclining the angles α and β).

[0035]

EFFECTS OF THE INVENTION The toothbrush of the present invention has a high effect of removing plaque on the interdental part and the neck part of the recessed part of the row of teeth and can be used without being disturbed by the lips and teeth (effect according to claim 1). . Further, the toothbrush of the present invention is easy to grip when brushing teeth (effects according to claims 1, 3 and 4).

[Brief description of drawings]

FIG. 1 is an enlarged perspective view showing a main part of an embodiment of a toothbrush of the present invention.

FIG. 2 is a plan view of an embodiment of the toothbrush of the present invention.

FIG. 3 is a side view of an embodiment of the toothbrush of the present invention.

4 is an enlarged end view of a cutting portion taken along the line AA in FIG.

5 is an enlarged end view of a cutting portion taken along the line BB in FIG.

FIG. 6 is a perspective view showing a part of a row of teeth.

FIG. 7 is an explanatory diagram showing a part of a usage pattern according to an embodiment of the toothbrush of the present invention.

8 is a view from below of FIG. 7, with the toothbrush illustrated as a cutaway end view corresponding to FIG. 4;

FIG. 9 is an enlarged perspective view showing a part of a tooth arrangement, and illustrates a method for measuring the amount of plaque when measuring the plaque removal rate.

[Explanation of symbols]

1 flocking table 11 bristle bundles in the outer peripheral row excluding the central part near the neck 12 other bristle bundles (brissle bundles in the inner row) 13 flocked surface 2 gripping part 21 bottom side (grinding section cut end is a roughly isosceles triangular cross section) 23) Surface of grip part (surface including the above-mentioned bottom 21) 3 Neck part

Claims (6)

[Claims] 1. A toothbrush comprising a hair-implanting table 1 on which a plurality of bristles are flocked, a grip portion 2, and a neck portion 3 connecting the hair-implanting table 1 and the grip portion 2, wherein the hair-implanting table 1 is provided. The bristle bundles 11 in the outer peripheral row are planted so as to be O-shaped, or the bristle bundles 11 in the outer peripheral row except for the central portion near the neck 3 are planted so as to be U-shaped. A step d is provided between the bristle bundles so that the positions of the bristle bundles 11 of the rows are higher than the positions of the bristle bundles of the other bristle bundles 12, and the bristle bundles 11 in the direction orthogonal to the neck portion 3 The width D is 5.0 to 7.
The neck portion 3 has an angle of α on the opposite side to the flocked surface 13.
A toothbrush characterized by being tilted. 2. The toothbrush according to claim 1, wherein the bristle bristles constituting the bristle bundle are spherically processed. 3. The grip portion 2 has a cross section of a substantially isosceles triangle at least at a portion near the neck portion 3 from substantially the center thereof, and a bottom side 21 of the isosceles triangle is the flocking surface 13 of the flocking table 1. The toothbrush according to claim 1 or 2, which is formed so as to be substantially parallel. 4. The toothbrush according to claim 3, wherein the neck portion 3 is inclined at the same angle β with respect to a surface 23 of the grip portion 2 including the base 21 of the isosceles triangle. 5. The toothbrush according to claim 1, wherein the step d is in the range of 0.5 to 1.5 mm. 6. The toothbrush according to claim 1, wherein the angle α is in the range of 5 to 10 ° and the angle β is in the range of 5 to 10 °.