KR101165264B1 - Toothbrush - Google Patents

Abstract

In the toothbrush of the flat hair type method which transplanted the hair | bristle bundle into a high density, there is no hair loss, such as a crack, whitening, a warpage state, or a bad parallel position, in a head part at the time of hair transplantation, and it is elastic, and it feels well, and it is a fine gap Provides a high quality toothbrush that is also excellent for entry. The toothbrush 6 composed of a plurality of brushes 5 is folded into two of the hair transplant holes 3 of the hair transplantation surface 2 of the head part 1 using the flat line 4, and the toothbrushes of the flat line 4 are formed. The thickness (t) is 0.10 mm or more and 0.22 mm or less, the width (h) is 0.9 mm or more and 2.5 mm or less, and the number of hair bundles (5) per unit planting area is 25 bundles / cm ² or more 80 bundles / cm ² The total cross-sectional area of the hair | bristle bundle transplanted in the folded state per one tuft hole shall be 1.0 mm <^2> or less.

Toothbrush, hairpin, flat

Description

Toothbrush

The present invention relates to a toothbrush of a flat tuft type in which a hair bundle in which a plurality of lines are tied together is folded and planted in two in a tuft hole of a head tuft surface using a flat line.

Conventional toothbrushes have 16-60 pieces per hole, 32-120 when folded, and the entire brush cross section in the hair transplantation holes formed at intervals of 1.0 mm or more on the planting surface of the toothbrush head in consideration of production efficiency and ease of planting. The thick hair bundle which tied the brush so that it may be 1.0 mm <^2> or more is fixed by the flat line. In the case of such a toothbrush, since the hair | bristle bundle is thick and rigidity becomes high, the plaque removal force of the smooth surface and the occlusal surface was especially high.

However, because the hair bundle is thick, the brushes constituting the hair bundle are supported by each other, and the original elastic movement of each brush itself is not exerted, and it is narrow that is considered to be the oral disease triggering part such as the cervical part, the interdental part, the interdental triangle, etc. Not only is the tip of the hair difficult to reach, but the hair bundles are thick and easy to harden, and there is a problem that the soft tissues such as the gums are largely irritated.

In addition, the head part and the handle part have been changed in shape, material, color, etc. so as to differentiate the product range.However, for the hair part, the thickness and spacing of the hair bundle are all similar specifications, and the appearance difference is low, and the toothbrush It lacked originality as.

The flat line in the toothbrush of the flat hair-growing method has a dimension slightly longer than the diameter of the hair-growing hole, and when it is put in the hair-growing hole, both ends of it become lodged in the head resin around the hole, and the hair bundle is folded into two hairs. It is fixed in the hole. Thereby, the hair | bristle bundle is fixed to the head part hair transplantation surface, without going out from a hair-planting hole. Usually, the flat line has a length of 1.9 mm-2. 3 mm, up and down width, that is, the width in the depth direction in which the flat line is embedded 1.3-2. It is 0 mm and thickness is about 0.25 mm, and brass is generally used as a material.

In the case of a toothbrush made of a flat hair, the hair bundle spacing adjacent to each other, such as a thin-walled hair hole, is narrow and the direction of the flat hair is arranged in a straight line, and the head resin between adjacent flat hairs is cracked or whitened. Or a flat line, the head may be bent due to stress deformation, which may damage the appearance of the toothbrush. In addition, when the head part cracks or cracks at the time of hair removal, the yield of a product is reduced, and production efficiency is also unpreferable. In addition, there is a risk of causing a problem such as breakage of the head portion due to material fatigue during long-term use, if the toothbrush is broken during brushing, there is a risk of damaging the fingers and oral cavity.

In order to prevent this, the method of defining the ratio of the length from the bottom of the tuft hole to the head load to the thickness of the head portion (see Patent Document 1: Japanese Patent Application Laid-Open No. 819423), and the method of modifying the angle of flattening (patent document) 2: see Japanese Patent Application Laid-Open No. 2001314231), a method of alternately arranging hair bundles by flat hairs and glued hairs (see Patent Document 3: Japanese Patent Application Laid-Open No. 200 2360343), which is raised on the seedling surface of the nearest part of the horizontal line. The method of forming a part (refer patent document 4: Unexamined-Japanese-Patent No. 10-257922) etc. is proposed.

On the other hand, plaque removal is important for the prevention of two major dental diseases such as periodontal disease and tooth decay, and every corner of the oral cavity can be wiped off. Toothbrushes are quite desirable.

In general, when the number of bristles that are planted on the toothbrush of the flat tuft type is small, the bristle spacing is widened, and plaque removal is not sufficiently performed. On the contrary, when the number of bristle bundles is high, bristle spacing is narrowed, and the flexible movement of the bristle is inhibited. Drops sharply In addition, when the hair bundle is thick, the stiffness of the hair bundle becomes too high, making it difficult to penetrate into the interdental portion or the minute gap, and also increase the risk of damage to the teeth or gums. On the contrary, when the hair bundle is thinned, the hair bundle strength is weakened, the feeling of loss of loss of hair loss decreases, the function of removing plaque at the site where tooth decay occurs well, and the durability as a toothbrush also decreases. Therefore, conventionally, the diameter is about 1.6-2. The hair | bristle bundle of the thickness about 0mm is planted about 20 bundles / cm <^{2> of} hair | bristle bundles per unit tuft area.

Here, a toothbrush having a good feeling of loss and having a small number of brushes as a toothbrush for completely cleaning every corner of the oral cavity (see Patent Document 5: Japanese Patent Application Laid-Open No. 11500946, Patent Document 6: Japanese Patent No. 2000342334) , Toothbrushes which shorten the diameter of the hair bundles in the long direction of the toothbrush and adjust the decay force by the hair bundles (Patent Document 7: Korean Utility Model Publication No. 2549935, Patent Document 8: Japanese Patent Application Laid-Open No. 10327930, Patent Document 9: Japanese Patent Laid-Open No. 10327931).

Toothbrushes, which have a small tuft of pores of about 1.0 mm, are also known as in electric toothbrushes. Since the electric toothbrush has a small bristle, the specification which makes the diameter of a hair | bristle bundle small and a hair | bristle bundle as many as possible is examined (refer patent document 10: Unexamined-Japanese-Patent No. 1150 8168).

In addition, with the recent improvement of the oral hygiene consciousness, there is a strong tendency to wipe every corner of the mouth, such as molar teeth, and for this purpose, a toothbrush for thinning the head using polyacetal (see Patent Document 11: Japanese Patent Application Laid-Open No. 7-143914) Etc. are also proposed.

Patent Document 1: Japanese Patent Application Laid-Open No. 8-19423 (previous page, entire drawing)

Patent Document 2: Japanese Patent Application Laid-Open No. 2001-314231 (previous page, entire drawing)

Patent Document 3: Japanese Patent Laid-Open No. 2002360343 (full page, entire drawing)

Patent Document 4: Japanese Patent Application Laid-Open No. 10257922 (Full Page, Entire Drawing)

Patent Document 5: Publication No. 11500946 (Full Page, Entire Drawing)

Patent Document 6: Japanese Patent Laid-Open No. 2000342334 (previous page, entire drawing)

Patent Document 7: Registered Utility Model No. 2549935 (All Pages, Entire Drawing)

Patent Document 8: Japanese Patent Laid-Open No. 10327930 (Full Page, Entire Drawing)

Patent Document 9: Japanese Patent Application Laid-Open No. 10-327931 (all pages, entire drawing)

Patent Document 10: Japanese Patent Application Laid-open No. 11-508168 (all pages, entire drawing)

Patent document 11: Japanese Patent Laid-Open No. 7143914 (previous page, entire drawing)

Problems to be Solved by the Invention

Conventional toothbrushes have a thick hair bundle and a high plaque removal force on the occlusal surface of the tooth, but have not reached the brush tip at the oral disease dispensing part such as the dental neck, the interdental part, the interdental triangle, or the like. Accordingly, attempts have been made to solve such problems by planting fine hairs at a high density, but little is known about optimal hair thickness or spacing.

Moreover, when hair | bristle bundles were planted at high density, the space | interval of a flat line narrowed and there existed a problem that a crack, whitening, a curved state, etc. generate | occur | produced in a head part. On the other hand, when the flat line was shortened for the purpose of preventing the occurrence of cracks and whitening, problems such as the bristle strength and the pull strength of the single sole were reduced.

As described above, various toothbrushes have been proposed to prevent the occurrence of cracks, whitening, bent heads, and the like. Could not be realized.

As a solution for cracking and whitening, there are methods such as widening the spacing between hair bundles and changing the type of resin.However, widening the hair spacing does not provide a sufficient function as a toothbrush. If considered, this could not be a possible option.

On the other hand, as a basic performance of the toothbrush can be cleaned every corner of the mouth, there is no fear of damage to the teeth or gums, there is a strong demand to implement a toothbrush with good sense of loss, to realize this, a small number of solo The method of planting the hair | bristle bundle with high density, the method of thinning the head part, etc. are applied, but the problem of cracking, whitening, or bending of the head part resin between adjacent flat lines at the time of planting Remained.

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The present invention has been made to solve the above problems, and is a toothbrush of a flat hair transplant method in which the hair bundle is transplanted at a high density, and has no elasticity, such as cracking, whitening, warpage, or missing flat lines, in the head portion during hair transplantation. It aims at providing the toothbrush of high quality which is excellent in a feeling of loss to a tooth and oral internal combustion tissue, and is excellent also in the entry into a minute gap.

MEANS FOR SOLVING THE PROBLEMS [

In order to achieve the above object, the toothbrush according to claim 1 is a toothbrush formed by folding a hair bundle of a plurality of brushes into two hair transplant holes of the hair transplant surface using a flat line, and the number per unit planting area of the planted hair bundle 25 bundles / cm 2 or more, 80 bundles / cm 2 or less, the total cross-sectional area of the hair bundle that has been cultivated per one bristle hole is 1.0 mm 2 or less, and the distance from the other hair follicles closest to the at least one hair follicle hole is 1.0 mm or less. In a flat toothbrush, the thickness of the flat wire is 0.10 mm or more and less than 0.22 mm, and the resin breaking volume due to the flat wire is in the range of 0.1 to 0.4 mm.

In the toothbrush of Claim 2, in the invention of Claim 1, the width | variety of the said flat line shall be 0.9 mm or more and 2.5 mm or less.

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In addition, the number of hair | bristle bundles per unit tuft area is the value which divided | segmented the total number of hair | bristle bundles (= total number of tuft holes) which were planted in the head part hair-planting surface by the hair-planting area (cm <^2> ). In addition, based on the regulation of JIS S3016, a hair-planting area is the inside of the part which tied the outer side of the hair-stitching hole 3 located in the outer periphery of the hair-planting surface 2 of the head part 1 by straight line. Area S (part enclosed by dotted lines).

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When the hair | bristle bundle is fixed using a flat wire like the toothbrush of this invention, since a flat wire will destroy resin in the vicinity of a tuft hole, when a flat wire gets stuck, a stress will generate | occur | produce in resin. Conventionally, the flat line has used a thickness of about 0.25 mm or more. However, when the number of hair bundles per thin-walled hat-hole or unit hair-planting area is large, the flat line is dense, so that a large stress is generated in the resin around the hat-hole. Cracks and whitening of the head resin between the lines may occur. In addition, cracks or whitening were caused even when the parallel lines were arranged in a straight line.

When a flat line having a thickness of about 0.25 mm or more is used, a warped state, whitening or cracking of the head portion is likely to occur. For example, when a hard and relatively hard to bend resin having a flexural strength of 600 kg / cm ² or more and 750 kg / cm ² or less is used as the head member, the hair is bent in the head portion by using a flat line having a thickness of 0.25 mm. did. Here, the thickness of 0.10 -0 employed in the present invention. When the hair was transplanted using a 22 mm flat line, the warpage of the head portion was reduced, and there was almost no problem in actual use.

On the other hand, when the bending strength of the resin is 150 kg / cm ² or more and 600 kg / cm ² or less, a soft and relatively bendable resin, for example, polyolefin resin such as polypropylene, is used as the head member, the thickness is 0.25 mm. The use of a flat line causes an extremely large warp in the head portion, and the seedling hole is shifted from the regular position, so that even the flat line can not be driven continuously. Here, thickness 0.10-0. Employed in the present invention. When the 22 mm flat line was used, the warped state of the head during the seedling was hardly seen, and the flat cutting could be performed smoothly. As described above, in the case of a relatively bendable resin having a bending strength of 150 k g / cm ² or more and 600 kg / cm ² or less, such as a polyolefin resin, the effect of reducing the warpage due to the thinning of the flat line is particularly remarkable. It turned out. In addition, the bending strength here is the value measured based on JISK6758.

In addition, when the flat line thickness was less than 0.10 mm, the strength against the head resin was insufficient, and it was found that deformation occurred in the flat line at the time of hair removal, which made the hair itself difficult.

In order to improve the operability in the oral cavity, it is preferable to make the thickness of the head portion thin. When the thickness of the head portion is thicker than 5.0 mm, the operability in the oral cavity is lowered. Although the operability improves when a head part is thinned, since the amount of resin which supports a hair | bristle bundle is inevitably reduced, the strength of a head part inevitably decreases, and curvature, a crack, whitening, etc. may arise in the flat line of normal thickness. In addition, when the head portion is too thin, the tuft hole becomes shallow and the tuft is difficult. Here, for the case where the head portion is 2.5 mm or more and 5.0 mm or less, a hair transplant experiment was performed using flat lines having various thicknesses, but the thickness was 0.10 mm or more and less than 0.22 mm, preferably 0.13 mm or more and less than 0.22 mm. If a flat line having a thickness of is used, it is certain that warpage, cracks, and whitening are less likely to occur.

Based on the various experimental results mentioned above, this invention makes the thickness of a flat line 0.10 mm or more and less than 0.22 mm, Preferably it is 0.13 mm or more and less than 0.22 mm.

About the width | variety of the depth direction to which a flat line pinches, since the contact area of the flat line to head resin will increase when width is enlarged, it is possible to raise a hair-planting strength, without increasing the width which a flat line overlaps. Therefore, in the case of a resin having a relatively soft hair because the head material is relatively soft such as polypropylene resin (PP), it is advantageous in terms of the hair strength to make the width of the flat line as large as possible. However, according to the experiments of the present inventors, when the width of the flat line is larger than 2.5 mm, the flat line is protruded outward from the seedling surface or when the seedling surface is seen from the tip of the head part, the flat line is visible, which is undesirable in appearance. It turns out that there are many things that produce results.

On the other hand, the head material is polyacetal resin (POM) or saturated polyester resin (e.g., acid-modified polycyclohexylenedimethylene terephthalate copolymer (PCTA), glycol modified polycyclohexylenedimethylene terephthalate copolymer ( In the case of a resin which is relatively hard and has a high bristle strength, such as PCTG), sufficient bristle strength can be obtained even if the width of the flat line is reduced. Therefore, if the width of the flat line is made small and the depth of the tuft hole is also shallow, the thickness of the head portion can be made thin, and the operability can be improved. However, if the width of the flat line is made too small, the hair strength is lowered, which causes problems in practical use. According to the experiments of the present inventors, when the width | variety of the flat line was less than 0.9 mm, it turned out that the hair-plant strength falls remarkably. Here, in the present invention, the width of the flat line is 0.9 mm or more and 2.5 mm or less.

Usually, in the case of the toothbrush of the flat tuft type, the number of hair | bristle bundles per unit tuft area is 20 bundles / cm <^2> , and the sum of the cross-sectional area of a brush is 1.1-2. Although it is about 5 mm ² , according to an experiment of the inventors, the number of hair bundles per unit tuft area is 25 bundles / cm ² or more and 80 bundles / cm ² or less, and the total number of hairs that have been planted in a folded state per one tuft When the cross-sectional area was 1.0 mm ² or less, it was found that the feeling of loss to the teeth and the gum was good, and the interdental entry and the plaque removal function were also excellent.

The total sum of cross-sectional area of the brush in the bent folded state implanted in one flocking holes 1.0mm ² or less is preferred, and more preferred is a range of 0.70mm ² at 0.10. In this case, the shape of the sole section is circular, for example, in the case of a 7 mil (0.178 mm) sole, it corresponds to approximately 5-14, or 10-28, per hole, but this is a design standard. It can set arbitrarily according to the toothbrush specification of a top, a brush diameter, a cross-sectional shape, etc.

When the total cross-sectional area of the hair | bristle bundle transplanted per one bristle hole is larger than 1.0 mm <^2> , the elasticity of a hair | bristle bundle will disappear and the hair | bristle bundle reach | attains to a minute clearance will worsen, and sufficient intraoral cleaning cannot be achieved. In addition, even if the total number of brush sections is 1.0 mm ² or less, when the number of hair bundles per unit planting area is more than 80 bundles / cm ² , the spacing between hair bundles becomes very narrow, and the interdental penetration is not only remarkably inferior. Since the range of freedom of movement is limited, it is difficult to clean the fine chain parts such as the cervical region. In addition, hygiene problems occur such as toothpaste that remains between the hairs and extremely poor drying after use. In addition, even if the total area of the brush sections is 1.0 mm ² or less, when the number of hair bundles per unit planting area is less than 25 bundles / cm ² , the appearance is not only very poor, but also the bristle strength is difficult and cleaning of the tooth surface becomes difficult. The durability of the toothbrush is also lowered.

In addition, in the case of planting hair bundles by the flat type planter, the hairs folded in two in the brace of the flat type planter have a restoring force to return to a straight shape, which gives a large repulsion force to the flat line. According to the experiments of the present inventors, the diameter is 1.6-2. In the case of a hair bundle having a thickness of 0 mm (cross section 2.0-3.1 cm ² ), a hair bundle can be inserted into a flat line having a thickness of about 0.25 mm, but a thin flat wire having a thickness of 0.10 mm or more and less than 0.22 mm employed in the present invention. In some cases, the flat line may not withstand the restoring force of the hair bundle, and the incidence rate of hair transplant failure may be very high, such as the flat line may deviate from or shift from the hair bundle. In this case, it has been found that when the flat material is made of hard metal such as stainless steel, the stiffness of the thin flat line is increased to reduce the incidence of hair transplant failure.

On the other hand, the inventors of the present invention have found a condition of hair bundle thickness that satisfies both the chain performance and the thin flat line, and as a result, the total cross-sectional area of the sole in the folded state is 1.0 mm ² or less, more preferably 0.1 mm ² or more. It is possible to use a hair bundle having a diameter of 0.7 mm ² or less, and a toothbrush that can sufficiently withstand the restoring force of the hair bundle during hair removal while maintaining high chain performance as a high-density hair removal toothbrush.

In addition, the distance between the at least one hair follicle and the other adjacent hair follicles adjacent to each other (nearly between the hair follicles) is preferably 1.0 mm or less, more preferably 0.25 mm or more and 0.75 mm or less. If the bristle spacing is too narrow, the sole does not enter the interdental and the interdental accessibility is reduced. On the other hand, when the spacing becomes wider, appearance differentiation and loss of feeling of loss decrease. In addition, when the spacing becomes wider, the repelling action of the hair bundle accompanying the brushing movement becomes stronger, not only the feel of the hair bundle becomes rough at the time of shading, but also the feeling of use decreases, the smooth movement of each brush is not exhibited, and the plaque removal effect also decreases. do.

In most conventional flat bristle toothbrushes, in order to secure the bristle strength prescribed by the JIS standard, a flat bristle hole having a circular cross section having a diameter of about 1.5-2.2 mm is used, and a flat line from the blood clot of the follicle hole is used. Overlap width is set to about 0.25 mm. Even in the toothbrush which has many hair follicles of a few hair | bristle bundles, although the thickness of a flat line and the width | variety of overlapping can be secured to some extent, the hair-planting strength can be ensured, but there exists a limit because it causes a crack and whitening.

Here, as a result of experiments and research conducted by the present inventors, in the minority bristles, the strength of the tufts is the packing factor PF = (sum of cross-sectional area of the brush) / (flocked hole area-cross section of the flat line located in the tuft hole) × 100 [%] (Density of hair bundles for hair-stripping holes per hole = 1), the length of the horizontal line and the type of the handle resin, and find that the parallel line is closely related to the volume (resin breaking volume) that destroys the handle resin. Paid. And as a result of further examination, it turned out that the range of the optimal resin destruction volume is the range of 0.1-0.4mm <^3> , More preferably, it is the range of 0.15-0.3mm <^3> . If it is less than 0.1 mm ³ , it is not enough to acquire the hair-planting strength which is an essential physical property as a toothbrush, and when it exceeds 0.4 mm ³ , it turned out that problems, such as the bending state of a head part and whitening of head part resin, arise.

Examples of the material of the toothbrush handle including the head portion include polystyrene resin (PS), polypropylene resin (PP), polyethylene terephthalate resin (PET), acrylonitrile butadiene styrene resin (ABS), cellulose propionate resin (CP), and polya Relate resin, polycarbonate resin (PC), saturated polyester resin (PCTA, PCTG, etc.), acrylonitrile styrene resin (AS), polyacetal resin (POM), polybutylene terephthalate (PBT), etc. Can be used alone or in combination. It is also possible to produce multicolor molded handles in combination with thermoplastic elastomers and the like. In addition, a handle material is not limited to the said resin. In addition, the shape, size and design of the toothbrush handle including the head is not limited.

The material of the flat wire is preferably a metal such as brass or stainless steel which is excellent in strength. Other hard plastics, including biodegradable plastics, can also be used. Growing strength can also be improved by making grooves on the outer surface of the flat to be perpendicular to the flat direction.

As described above, in the conventional toothbrush, although a flat line having a thickness of about 0.25 mm is used, it is very difficult in the art to manufacture a thinner than the conventional flat line made of metal. In other words, the flat wire is manufactured by rolling a metal wire called a round wire with a roll, and usually a thick round wire is stretched into a thin round wire while heating in a blast furnace.The round wire used for thin flat wire is thinner than usual, so it is uniform in one step. It was not possible to produce a ring wire with.

However, in recent years, the flat manufacturing technology has been improved, and the drawing process can be gradually extended by dividing the drawing step into multiple stages, thereby making it possible to obtain a ring line as thin as necessary. In addition, when rolling round rings, the force of pushing the round lines is too strong in a roll of a normal size, causing inconveniences such as hair loss, such as a flat line ripples, but to reduce the diameter of the roll to roll with a suitable pressure force It became possible to manufacture a thin flat line. Therefore, manufacture of the thin flat line of 0.10 mm or more in thickness, less than 0.22 mm, width 0.9 mm or more, and 2.5 mm or less used by this invention is possible.

Since the thickness and length of the flat line are directly related to the volume of the head resin broken by the flat line, based on the relationship between the shape and size of the hair growth hole, the overlapping width of the flat line relative to the blood, the depth of the flat line, etc., It is preferable to set the resin breaking volume to a thickness and a length of 0.1 mm ³ or more and 0.4 mm ³ or less.

The shape of the tuft hole is preferably a regular polygon such as a circle or a square, but may be a shape having a long diameter (long side) and a short diameter (short side), such as an ellipse, an ellipse, and a rectangle. Moreover, the combination of the direction of a hole is possible, and the specification which has the target interdental property, the comfort of a sole, and a loss of a loss of feeling is possible. In addition, in the case of a tuft hole having a long diameter (long side) and a short diameter (short side), if the short diameter (short side) is arranged in parallel with the outer edge of the head, the narrow short diameter (short side) of the width of the hair bundle transplanted when the head is viewed from the side As the side is visible, it is thinner than the original bristle with the same number of brushes, and the appearance difference can be improved.

Although the arrangement of the holes of the tuft hole is generally a lattice-like arrangement, the arrangement can be arranged in a zigzag shape in order to realize a higher density of hole arrangement while avoiding interference between adjacent flat lines. In addition, it is also possible to change the direction of the flat line in accordance with the position to make the hair bundle on the outermost side of the head portion thin, thereby improving the appearance differentiation.

When a flat line is put in the direction of the long diameter of the tuft hole, since the brushes are arranged along the flat line, the strength of the tufts is improved. At this time, it is preferable that the shape of the tuft hole is close to a rectangle in order to reduce the gap between the hair bundle and the tuft hole. Moreover, in order to make a flat line in a short diameter direction, it becomes possible to reduce the space between a hair transplantation hole and a hair | bristle bundle by matching the short diameter direction of a circumscribed circle with respect to a cross section of a hair | bristle bundle, and the hair | bristle bundle, Can generate wealth. At this time, when the cross section of the brush to be used is circular, it is preferable to make the shape of the hair-planting hole close to an ellipse or a rectangle.

Examples of the material of the filaments constituting the hair bundle include polyester such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polytrimethylene terephthalate (PTT), and nylon such as nylon 610 nylon 612 nylon 12 Dissolved and spun materials such as polyolefins such as amide, polyethylene, polypropylene, and polyhalide halides such as polyvinylidene fluoride are used, but nylon, polytrimethylene tere in terms of usability and durability Phthalates are preferred. In addition, a dual core-sheath structure can be manufactured using such a resin, and it can be combined according to the purpose, such as varying the material and the surface state at the inside and the outside.

The thickness of the sole is preferably 3-10 mils (0.076-0.254 mm), preferably 5-8 mils (0.125-0.203 mm), and the thickness within these ranges is considered in consideration of usability, reduced feeling, cleaning effect, and durability. It is also preferable to use other brushes in combination. Especially in the case of the high density specification which arranged a lot of hair-frilling holes, it is a feeling to change the hair | bristle bundle strength of the sole from the outer hair | bristle bundle to the center hair | bristle bundle, and to change the thickness, material, length, color, and cross-sectional shape of a sole. However, it is preferable for appearance differentiation.

Types of brushes include round bristles (hairs only), fine bristles (tapered brushes), diamond bristles (ridges with cross sections), feather bristles (brushes with multiple bristles like feathers), and other types of brushes. Irregular sectional hairs (brushes with non-circular cross section), wood grains (polishing brushes), spiral catch hairs (held grooved brushes), indicator hairs (double colored with outer layer) Various brushes, such as a brush having a poncho structure and informing the replacement time due to wear of the outer layer, can be used, but are not limited thereto.

Arbitrary shapes, such as a single planar shape, an inverted v-shape, an uneven | corrugated shape, can be employ | adopted as the truncated shape (profile) of a brush tip surface. Moreover, it can also be set as the cross-sectional shape in which the outer side and inner side of a head part transplantation surface, or a front end side and a rear end side differ.

The scope of the toothbrush referred to in the present invention includes not only a manual toothbrush but also an electric toothbrush.

EFFECTS OF THE INVENTION [

The toothbrush according to claim 1 has a number of unit hairs per planted area of at least 25 bundles / cm 2, 80 bundles / cm 2 or less, and a total cross-sectional area of the hair bundles folded in one flocked hole at 1.0 mm 2 or less, and at least one In the toothbrush of a flat hair transplanter having a distance from other hair holes closest to the hair-stucking hole of 1.0 mm or less, the thickness of the flat wire is 0.10 mm or more and less than 0.22 mm, and the resin breakage volume by the flat wire is 0.1 to Since it is in the range of 0.4 mm, it is a flat toothbrush with a high-density hair transplantation, and hair loss, such as cracking, whitening, warping, and flat pulling, does not occur at the head part during hair transplanting, and it is more elastic, and the teeth and oral cavity It is possible to provide a high-quality toothbrush with good touch to internal soft tissues and excellent entry into fine cracks.

Since the toothbrush of Claim 2 made the width | variety of a flat line 0.9 mm or more and 2.5 mm or less, sufficient hair transplant strength can be ensured, without damaging the external appearance of a hair-fed part, using a thin flat line.

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1A to 1C show a first embodiment of a toothbrush according to the present invention, FIG. 1A is a schematic plan view of a head portion, FIG. 1B is a schematic perspective view of a flat hair cutting hair, and FIG. It is a schematic explanatory drawing of the folded state.

Fig. 2 shows a second embodiment of the toothbrush according to the present invention and is a schematic plan view of the head portion of the electric toothbrush.

3A to 3F are plan views illustrating another example of the cross-sectional shape of the hair transplantation hole and the sole, respectively.

4A to 4C show a third embodiment of the toothbrush according to the present invention, FIG. 4A is a schematic perspective view showing the relationship between hair bundles and a flat line, FIG. 4B is a schematic plan view thereof, and FIG. It is a partial enlarged plan view.

5A to 5C are diagrams for explaining the resin breaking volume according to the present invention. FIG. 5A is a schematic plan view of a hair bundle and a flat line implanted in a tuft hole, FIG. 5B is a longitudinal cross-sectional view thereof, and FIG. 5C is a cross-sectional view.

6A to 6C show the shape of the head of the toothbrush used in the evaluation test, FIG. 6A is a schematic top view of the head of a type A toothbrush, FIG. 6B is a schematic top view of the head of a toothbrush of type B, and FIG. A schematic top view of the head of a toothbrush.

7A to 7C are schematic explanatory diagrams of the bent state and thickness of the head portion.

8 is a schematic plan view of a head portion showing an embodiment of a toothbrush according to the present invention.

Fig. 9 is a schematic plan view of a head portion showing another embodiment of the toothbrush according to the present invention.

Fig. 10 is a schematic plan view of a head showing another embodiment of the toothbrush according to the present invention.

11 is a schematic plan view of a head section showing another embodiment of the toothbrush according to the present invention.

12 is a schematic plan view of a head portion showing still another embodiment of the toothbrush according to the present invention.

Fig. 13 is a schematic plan view of a head showing another embodiment of the toothbrush according to the present invention.

Fig. 14 is a schematic plan view of a head portion showing still another embodiment of the toothbrush according to the present invention.

15A and 15B show another embodiment of the toothbrush according to the present invention, FIG. 15A is a plan view of the entire toothbrush handle without the tuft hole, and FIG. 15B is an enlarged plan view of the head portion.

16A and 16B show yet another embodiment of the toothbrush according to the present invention, Fig. 16A is a plan view of the entire toothbrush handle without the tuft hole, and Fig. 16B is an enlarged plan view of the head portion.

Fig. 17 is a schematic plan view of a head showing another embodiment of the toothbrush according to the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings.

1A to 1C show a first embodiment of a toothbrush according to the present invention. This 1st Embodiment shows the example at the time of applying this invention to a manual toothbrush, FIG. 1A is a top view of a head part, FIG. 1B is an enlarged perspective view of a flat line, FIG. It is a schematic explanatory diagram of a state. In addition, in order to make it easy to see, the illustration with respect to the brush implanted in the tuft hole is abbreviate | omitted in FIG.

In the figure, 1 is a head part of the toothbrush, 2 is a woolen face of the head 1, 3 is a woolen hole formed in the woolen face 2, 4 is for folding the hair bundle 5 into the woolen hole 3l in two. 6 is a brush which constitutes the hair | bristle bundle 5, and 25 bundles / cm <^{2> of} the number per unit tuft area of the hair | bristle bundle 5 implanted in the hair-planting hole 3l of the hair-planting surface 2 of the head part 1 or more, 80 bundles / cm ² and at the same time or less, flocking holes 3, the flocking mosok 6 is 1.0mm for the total cross-sectional area in the base implanted in a collapsed state flocking holes per ^second or less, the horizontal lines 4 To a thickness t of 0.10 mm or more and less than 0.22 mm, and the width of the horizontal line 4 (the width of the foil when the horizontal line 4 is driven to the seedling surface 2) h is 0.9 mm or more and 2.5 mm or less It is. In addition, reference numeral L represents the length of the flat line 4.

When the hair bundle 5 is set in the same manner as described above, even when the hair bundle 5 is folded in two in the hair growth hole 3l by the flat line 4, since the flat line 4 is thin, the hair of the head 1 is affected by the impact. The resin around the hole 3 does not cause cracks or whitening. Moreover, the head part 1 will not bend. Moreover, when folded in two, the flat line 4 does not deviate from the hair | bristle bundle 5 or a position difference arises by the elastic restoring force of the hair | bristle bundle 5 which tries to restore | restore in linear form.

2, the 2nd Embodiment of the toothbrush concerning this invention is shown. This 2nd Embodiment shows the example at the time of applying this invention to an electric toothbrush, and FIG. 2 shows the head part of an electric toothbrush. Also in the case of this electric toothbrush, 25 bundles / per unit hair area of the hair | bristle bundle 5 planted in the hair-planting hole 3l of the hair transplantation surface 2 of the head part 1 similarly to the case of an electric manual toothbrush. in cm ² or more, less than 80 bundles / cm ^2, and at the same time, by the mosok 6, the total cross-sectional area in the base implanted in a collapsed state implanted per hole implanted in flocking holes 3 to less than 1.0mm ^2, The thickness t of the flat line 4 is 0.10 mm or more, less than 0.22 mm, and width h is 0.9 mm or more and 2.5 mm or less.

In addition, the shape of the tuft hole 3 and the hair | bristle bundle 6 used by this invention is not limited to the example shown, For example, as shown to FIG. 3A-FIG. 3F, various shapes can be employ | adopted. have. Fig. 3a shows an example of a circular bristle hole and a circular cross section brush, Fig. 3b shows an example of a circular tuft hole and a spherical cross section brush, and Figs. 3c and 3d show an example of an elliptical tuft hole and a circular cross section brush, Fig. 3e. Is an example of a rectangular bristle hole and a circular cross section brush, FIG. 3F shows an example of a rectangular bristle hole having a rounded edge and a diamond cross section (rhombohedral cross section), respectively.

4A to 5C show a third embodiment of the present invention.

In this 3rd Embodiment, the hair | bristle bundle 5 which bundled the hair | bristle bundle 6 of several lines was folded in two by the hair-line hole 3 of the hair-planting surface 2 of the head part 1 using the flat line 4. With respect to the toothbrush which was planted, the sum of the cross-sectional areas of the hair | bristle bundles 6 which comprise the hair | bristle bundle 5 planted by the hair-planting hole 3 shall be 1.0 mm <2> or less, and the distance to the nearest bristle | bristle hole 3 closest (recently The distance between the grafts and the hairs) is set to 1.0 mm or less, and the volume V of the resin of the head 1 broken by the flat line 4 is set to 0.1 mm ³ or more and 0.4 mm ³ or less.

Here, "the sum of the cross-sectional areas of the hair | bristle bundle 6 which comprises the hair | bristle bundle 5" means the cross-sectional area of the hair | bristle bundle 5, ie, all hair | bristle bundles 6 planted in the tuft hole 3, as shown to FIG. 4B. Plus the value. Further, "Recent distance to contact any of the flocking holes 3 (Nearest Neighbor formula mohyeol distance) (D _min) is a plurality of flocking holes 3 as shown in Figure 4c the center, the distance is close flocking holes It is pointing to the distance between.

In the case of "horizontal lines is the volume (V) of the resin to be destroyed by 4, for example as shown in Figure 5a to 5c example, a circular cross-section flocking holes 3 of, V (mm ³⁾ is flat Thickness t (mm) of a line x foil of a flat line is a value obtained by the formula of the depth B (mm) x overlapping width C (mm) x 2 of a flat line.

In addition, in the case of the circular tuft hole 3 shown to FIG. 5A-FIG. 5C, since the part of the overlapped width C of the flat line 4 is partitioned by the circular arc wall of the tuft hole 3, resin breakdown volume V ( The value of mm ³ ) becomes an approximation in the above equation. However, when the flat line 4 is embedded in the short-diameter direction of the oval-shaped tuft hole 3 as shown in FIG. 4B, the overlapped width portion of the flat line 4 is the hair seedling. Since it is partitioned at the straight wall portion of the hole 3, the resin breakdown volume V (mm ³ ) is the thickness t (mm) of the flat line × the depth of the flat line B (mm) × the overlap width C (mm) x 2 of the flat line. You can get it exactly. Similarly, in the case of a tuft hole having a different cross-sectional shape, it can be obtained with an approximation or an accurate value.

According to the said embodiment, since the sum total of the cross-sectional area of the hair | bristle bundle 6 which comprises the hair | bristle bundle 5 planted by the hair-frilling hole 3 was 1.0 mm <^2> or less, the hair | bristle bundle which is flexible and feels well to a tooth and oral internal tissue is good. do. In addition, since the distance D with any of the closest tuft holes 3 adjacent to each other is set to 1.0 mm or less, the hair bundle having excellent interdental penetration and a feeling of loss of wear with moderate hair density is obtained. At the same time, the volume V of the resin of the head 1 broken by the flat line 4 is set to be 0.1 mm ³ or more and 0.4 mm ³ or less, so that appropriate hair strength can be obtained and the warpage of the head and the Whitening or cracking can be prevented. As a result, each of the above effects is combined, and the touch to the teeth and oral internal tissue is good. A crack does not generate | occur | produce and it can manufacture with the toothbrush which has sufficient tuft strength.

1. Quality characteristic evaluation test

The quality characteristic evaluation test was done using the toothbrush which concerns on the 1st and 2nd embodiment of this invention, and the toothbrush of a conventional specification. The results are shown in Table 1. In addition, the toothbrush of A-C type of Table 1 is a toothbrush of the following shapes and specifications, respectively.

(i) Type A

Head portion shape: Fig 6a

Hair hole shape: rectangle (short side 1.35mm × long side 1.8mm) Number of hair bundles per unit planting area: 19 genera / cm ²

Total cross section of hair bundle per 1 hole: 1. 52 mm ²

Length of flat line L: 2.2mm

(ii) type B

Head Shape: Fig 6b

Hair hole shape: round (diameter 1.3mm)

Number of hair bundles per unit planting area: 28 genera / cm ²

Total cross section of hair bundle per 1 hole: 0. 78 mm ²

Length of parallel line L: 1. 8 mm

(iii) type C

Head Shape: Fig 6c

Wool hole shape: oval (short axis 0.64mm × longest diameter 1.52mm in ellipse)

Number of hair bundles per unit planting area: 44 genera / cm ²

Total cross section of hair bundle per 1 hole: 0. 39mm2

Length of parallel line L: 1. 8 mm

As is clear from the test results in Table 1, the toothbrush of the present invention (Example 1-22) has a hair growth state, a warpage of the head portion, cracks and whitening, and a hair growth strength, compared to a toothbrush (Comparative Example 1-12) of the conventional specification. It was confirmed that each was excellent.

Head material
Head thickness
(mm) Line thickness
(mm) Flat piece width h (mm) Mosque installation
Condition Warpage Crack / whitening Hair strength Intraoral
Operability Overall assessment T
y
p
e

A Example 1
PP 4.5 0.20 1.8 ○ ◎ ◎ ◎ ○ ◎ Example 2
PCTA 4.5 0.20 1.5 ○ ◎ ◎ ○ ○ ◎ Comparative Example 1
PP 4.5 0.25 1.8 △ × △ ◎ ○ × Comparative Example 2
PCTA 4.0 0.25 1.0 × △ ~ × △ ~ × ○ ◎ × T
y
p
e

B Example 3
PP 4.5 0.20 1.8 ○ ◎ ◎ ◎ ○ ◎ Example 4
PCTA 4.5 0.20 1.5 ○ ◎ ◎ ○ ○ ◎ Comparative Example 3
PP 4.5 0.27 1.8 ○ × △ ~ × ◎ ○ × Comparative Example 4
PCTA 4.0 0.27 1.0 × △ △ ~ × ◎ ◎ ×

T
y
p
e

C








Example 5 PP 4.5 0.12 1.3 △ ◎ ◎ △ ○ ○ Example 6 PP 4.5 0.12 1.8 △ ◎ ◎ △ ○ ○ Example 7 PP 4.5 0.12 2.5 △ ○ ◎ ○ ○ ○ Example 8 PP 4.5 0.15 1.3 ○ ◎ ○ ○ ○ ○ Example 9 PP 4.5 0.15 1.8 ○ ○ ○ ◎ ○ ○ Example 10 PP 4.5 0.15 2.5 ○ ○ ○ ◎ ○ ○ Example 11 PP 4.5 0.20 1.3 ◎ ○ ○ ◎ ○ ◎ Example 12 PP 4.5 0.20 1.8 ◎ ○ ○ ◎ ○ ◎ Example 13 PP 4.5 0.20 2.5 ◎ ○ △ ◎ ○ ○ Example 14 PCTA 4.5 0.12 1.5 △ ◎ ◎ ○ ○ ○ Example 15 PCTA 4.2 0.12 1.2 △ ◎ ◎ △ ◎ ○ Example 16 PCTA 3.9 0.12 0.9 △ ◎ ◎ △ ◎ ○ Example 17 PCTA 4.5 0.15 1.5 ○ ○ ○ ○ ○ ○ Example 18 PCTA 4.2 0.15 1.2 ○ ◎ ○ △ ◎ ○ Example 19 PCTA 3.9 0.15 0.9 △ ◎ ○ △ ◎ ○ Example 20 PCTA 4.5 0.20 1.5 ◎ ○ ○ ◎ ○ ◎ Example 21 PCTA 4.2 0.20 1.2 ○ ○ ○ ◎ ◎ ◎ Example 22 PCTA 3.9 0.20 0.9 △ ◎ ○ ○ ◎ ○ Comparative Example 5 PP 3.8 0.20 0.7 × ○ ○ × ◎ × Comparative Example 6 PP 4.5 0.20 2.7 × △ △ ○ ○ × Comparative Example 7 PP 4.5 0.08 1.5 × ○ ○ △ ○ × Comparative Example 8 PP 4.5 0.28 1.5 ○ × × ○ ○ × Comparative Example 9 PCTA 3.8 0.20 0.7 × ○ ○ × ◎ × Comparative Example 10 PCTA 4.5 0.20 2.7 × △ ○ ○ ○ × Comparative Example 11 PCTA 4.5 0.08 1.5 × ○ ○ △ ○ × Comparative Example 12 PCTA 4.5 0.28 1.5 ○ × △ ○ ○ ×

 In Table 1, the curved state is an extension line of the dotted line m after hair transplanting as shown in FIG. 7B when the intersection point between the dotted line m and the tip of the head portion 1 in front of the hair transplantation is shown in FIG. 7A. The distance n between the intersection point and the intersection point P is shown. In addition, as shown in FIG. 7C, the thickness of the head portion represents the thickness T of the thinnest portion of the head portion 1 (the same in each test below).

In addition, each evaluation of Table 1 is based on the following criteria.

(1) planting state

◎: There is no nonuniformity of the brush

○: less uneven brush, good appearance

△: non-uniform brush but within the limit

×: large degree of unevenness of the brush and poor appearance

(2) bent head

◎: No warpage (n = 0mm)

○: greater than 0 mm and less than 0.1 mm

△: 0.1 mm or more, less than 0.5 mm

×: 0.5 mm or more

(3) Cracking and whitening (discoloration of the head resin around the horizon)

◎: No cracks or whitening

○: hardly cracks or whitening

(Triangle | delta): There is a little whitening

X: There is a crack and whitening

(4) wool strength

The measurement of the hair-planting strength was performed based on the method of the prescription | regulation to JIS S3016.

◎: 25N or more on average

○: 15N or more on average, less than 25N

△: average 8N or more, less than 15N

×: average less than 8N

(5) comprehensive evaluation

◎: Very good

○: Good

△: middle

×: not good

2. Sensory evaluation test

The sensory evaluation test of the toothbrush of this invention was performed by 30 expert panelists in the applicant's company. The average value of evaluation by 30 professional panelists was made into evaluation result. The results are shown in Table 2. As is apparent from Table 2, it was confirmed that the toothbrush of the present invention (Examples 23-26) had a better feel than the conventional toothbrush (Comparative Example 13-16), and was superior also in interdental entry and a feeling of loss of interdentation. .

Hair count per unit planting area
(Bundle / cm ² ) Total cross section of planted hairs per hole
(mm ² ) Flat thickness
(mm) Width of parallel line h (mm) touch Interdental
Accessibility cleaning
effect all
evaluation Example 23 44 0.8 0.20 1.8 ○ ○ ◎ ◎ Example 24 50 0.2 0.20 1.5 ○ △ ○ ○ Example 25 35 0.5 0.15 1.3 ○ △ ○ ○ Example 26 50 0.3 0.15 1.8 ○ ○ ○ ○ Comparative Example 13 40 1.8 0.18 1.5 × × ◎ × Comparative Example 14 20 0.8 0.15 1.3 △ × × × Comparative Example 15 22 1.2 0.20 1.4 △ △ △ △ Comparative Example 16 22 0.6 0.16 1.3 △ △ △ △

The sensory evaluation was based on the following criteria.

(1) texture

◎: Very good

○: Good

△: middle

×: not good

(2) interdental accessibility

◎: Very good

○: Good

△: middle

×: not good

(3) feeling of loss

◎: Very good

○: Good

△: middle

×: no feeling

(4) comprehensive evaluation

◎: Very good

○: Good

△: middle

×: not good

3. Test of bending state of head part by difference of resin used

The bent state test of the head part by the difference of resin used was done. The results are shown in Table 3l. As is clear from Table 3, in any case of the PP resin and the PCTA resin, the toothbrush of the specification of the present invention (flat thickness 0.15mm, 0.20mm) has a more curved state of the head than the toothbrush of the conventional specification (0.25mm flat thickness). It was confirmed that it did not occur.

Resin Flexural strength Line thickness Head bending PP 500 kg / cm ² 0.25 mm (conventional specification) Impossible to plant PP 500 kg / cm ² 0.15mm (original invention specification) ○ PCTA 680 kg / cm ² 0.25 mm (conventional specification) × PCTA 680 kg / cm ² 0.15mm (original invention specification) ○

Evaluation of the curved state of the head part was based on the following criteria.

◎: No warpage (n = 0mm)

○: greater than 0 mm, less than 0.1 mm

△: 0. 1 mm or more, less than 0.5 mm

×: 0. 5mm or more

4. Test the bending state of the head part by the difference in head thickness

In the case of the specification of this invention, and the case of a conventional specification, the test was done about the relationship between the thickness of a head part, and the state of bending. The results are shown in Table 4. As apparent from Table 4, in the case of the toothbrush hair of the specification of the present invention, it was confirmed that the warped state was small with respect to the thickness of a wide range of head portions as compared with the toothbrush of the conventional specification.

Head thickness T (horizontal) 2.0
mm 2.5
mm 3.0
mm 4.0
mm 4.5
mm 5.0
mm 5.5
mm Parallel thickness t (vertical column) 0.25 mm (conventional specification) × × × △ △ △ ○ 0.20 (invention specification) × ○ ○ ○ ○ ○ ○

Evaluation of the curved state of the head part was based on the following criteria.

◎: No warpage (n = 0mm)

○: greater than 0 mm, less than 0.1 mm

△: 0. 1 mm or more, less than 0.5 mm

×: 0. 5mm or more

In addition, a toothbrush (Experimental Example 27-38) and a toothbrush (Comparative Experimental Example 17-24) of the conventional specification according to the third embodiment of the present invention were produced, and the hair-planting strength, the pulling strength of the single brush, the bending of the head, Comparative experiments were conducted to evaluate the quality characteristics of cracks and bleaching, and to evaluate the goodness of touch, interdental entry, and sensory feeling. The results are shown in Table 5. As apparent from Table 5, it was confirmed that the toothbrush of the specification of the present invention was superior to the toothbrush of the conventional specification in all of the comprehensive evaluations.

Resin breaking volume
(mm ³ ) Nearest meal
Distance between holes
(mm) Total cross section of the brush
(mm ² ) Evaluation results Hair bundle installation strength Single brush pull strength warp Crack / whitening touch Interdental
Accessibility Cleaning effect Overall assessment Experimental Example 27 0.16 0.4 0.4 △ △ ◎ ◎ ◎ ○ ○ ○ Experimental Example 28 0.20 0.4 0.4 ○ ○ ◎ ◎ ◎ ○ ○ ◎ Experimental Example 29 0.30 0.4 0.4 ◎ ◎ ○ ○ ◎ ○ ○ ◎ Experimental Example 30 0.40 0.4 0.4 ◎ ◎ △ △ ◎ ○ ○ ○ Experimental Example 31 0.10 0.6 0.4 △ △ ◎ ◎ ◎ ○ ○ ○ Experimental Example 32 0.20 0.6 0.4 ○ ○ ◎ ◎ ◎ ○ ○ ◎ Experimental Example 33 0.30 0.6 0.4 ◎ ◎ ○ ○ ◎ ○ ○ ◎ Experimental Example 34 0.40 0.6 0.4 ◎ ◎ △ △ ◎ ○ ○ ○ Experimental Example 35 0.10 0.6 0.8 △ △ ◎ ◎ ○ ○ ◎ ○ Experimental Example 36 0.20 0.6 0.8 ○ ○ ◎ ◎ ○ ○ ◎ ◎ Experimental Example 37 0.30 0.6 0.8 ◎ ◎ ○ ○ ○ ○ ◎ ◎ Experimental Example 38 0.40 0.6 0.8 ◎ ◎ △ △ ○ ○ ◎ ○ Comparative Example 17 0.03 0.6 0.4 × × ○ ○ ○ ○ ○ × Comparative Example 18 0.08 0.6 0.4 × × ○ ○ ○ ○ ○ × Comparative Example 19 0.45 0.6 0.4 ◎ ○ × × ○ ○ ○ × Comparative Example 20 1.0 0.6 0.4 ◎ ○ × × ○ ○ ○ × Comparative Example 21 0.20 1.5 0.4 ○ ○ × × △ × ○ × Comparative Example 22 0.20 1.5 0.8 ○ ○ ○ ○ △ △ × × Comparative Example 23 0.30 1.5 0.8 ◎ ○ × × △ × ○ × Comparative Example 24 0.30 1.5 0.4 ◎ ○ ○ ○ △ △ × ×

Each evaluation of Table 5 was based on the following criteria.

1. Quality characteristic evaluation test

(1) wool strength

The measurement of the hair-planting strength followed the method of the prescription | regulation to JIS S3016.

◎: 25N or more on average

○: 15N or more on average, less than 25N

△: average 8N or more, less than 15N

×: average less than 8N

(2) single brush pulling strength

◎: 5N or more on average

○: 3N or more on average, less than 5N

△: average 1.5N or more, less than 3N

×: average less than 1.5N

(3) the bent state of the head

◎: No curling up (n = 0mm)

○: greater than 0 mm and less than 0.1 mm

△: 0. 1 mm or more, less than 0.5 mm

×: 0. 5mm or more

(4) Cracks or whites 7 (discoloration of the resin on the head around the horizon)

◎: No cracks or whitening

○: hardly cracks or whitening

(Triangle | delta): There is a little whitening

X: There is a crack and whitening

2. Sensory evaluation test

The average value of evaluation by 30 in-house professional panelists was made into evaluation result.

(1) good touch

◎: Very good

○: Good

△: middle

×: not good

(2) interdental accessibility

◎: Very good

○: Good

△: middle

×: not good

(3) feeling of loss

◎: Very good

○: Good

△: middle

×: no feeling

(4) comprehensive evaluation

◎: Very good

○: Good

△: middle

×: not good

Next, the specific design example of the toothbrush concerning this invention is shown below.

8 shows Example 39 which is a specific example of a toothbrush according to the present invention. In Example 39, the specifications of each part were set as follows.

Material of the head part: Polypropylene (PP) + SANTOPRENE (olefinic elastomer manufactured and sold by Advanced Elastomer Systems Co., Ltd. under the trademark `` Santoprene '')

Hair follicle: approx.square hole (short side 0.64mm × long side 1.32mm × depth 3.8mm), 71 holes

Number of hair bundles per unit planting area: 41 genera / cm ²

Sole: straight hair of nylon, diameter 8mil (0.203mm), 6 holes / 1 hole (number of brushes after folding: 12/1 hole)

Total cross section of hair bundle per 1 hole: 0. 388 mm ²

Flat line: Brass (thickness 0.17mm × length 1.6mm × width 1.5mm)

9 shows Example 40 which is a specific example of a toothbrush according to the present invention. In Example 40, the specifications of each part were set as follows.

Head Material: Saturated Polyester (PCTA)

Filamentous hole: Elliptical blood (short axis 0.64mm × longest diameter in ellipse 1.52mm ×, depth 3.0mm), 79 holes

Number of hair bundles per unit planting area: 44 genera / cm ²

Sole: straight hair of nylon, diameter 8mil (0.203mm), 6 holes per hole (number of brushes after folding: 12 holes per hole)

Total cross section of hair bundle per 1 hole: 0. 388 mm ²

Flat line: Brass (thickness 0.15mm × length 1.8mm × width 1.3mm)

10 shows Example 41 which is a specific example of a toothbrush according to the present invention. In Example 41, the specifications of each part are set as follows.

Head Material: Polyacetal (POM)

Hair donation: Approximately rectangular hole (short side 0.64mm X long side 1.32mm X depth 2.5mm), 64 holes

Number of hair bundles per unit planting area: 45 genera / cm ²

Sole: Fine bristles of polybutylene terephthalate (PBT), Base diameter: 8 mil (0.203 mm), 6 holes per hole (number of brushes after folding: 12 holes per hole)

Total cross section of hair bundle per 1 hole: 0. 388 mm ²

Flat wire: Stainless steel with grooves (thickness 0.2mm × length 1.8mm × width 1.5mm)

11 shows Example 42 which is a specific example of a toothbrush according to the present invention. In Example 42, the specifications of each part were set as follows.

Head Material: Polyacetal (POM)

Hair transplantation: approx. Rectangular hole (short side 0.64mm × long side 1.52mm × depth 2.0mm), 74 holes

Number of hair bundles per unit planting area: 41 genera / cm ²

Sole: Fine trimmed hair of polytrimethylene terephthalate (PTT), base diameter 8mil (0.203mm), 6 holes / 1 hole (12 holes / 1 hole after folding)

Total cross section of hair bundle per 1 hole: 0. 388 mm ²

Flat line: Outside = uneven diagnosis (thickness 0.2mm × length 1.8mm × width 2.0mm)

       Inside = uneven diagnosis (thickness 0.2mm × length 0.8mm × width 2.0mm)

12 shows Example 43, which is a specific example of a toothbrush according to the present invention. In Example 43, the specifications of each part were set as follows.

Material of the head part: Saturated polyester (PCTA) + PRIMAALLOY (polyester-based elastomer manufactured and marketed by Mitsubishi Chemical Corporation under the trademark `` PRIMALLOY '')

Feeding blood: 72 holes

(1) Round Hole (Diameter 0.8mm × 3.5mm Depth), 2 Holes

(2) Round Hole (Diameter 1.0mm × Depth 3.5mm), 24 Holes

(3) Approximately rectangular hole (short side 0.64mm X long side 1.30mm X depth 3.80mm), 46 holes

Number of hair bundles per unit planting area: 42 genera / cm ²

Brush:

(1) Nylon straight hair, 8mil (0.203mm) diameter, 4/1 holes (8/1 holes by number of brushes after folding)

(2) Nylon straight hair, 8mil (0.203mm) diameter, 7/1 holes (14/1 holes by number of brushes after folding)

(3) Polytrimethylene terephthalate (PTT) straight hair, diameter 6mil (0.152mm), 19/1 hole (38/1 hole by the number of brushes after folding)

 Total cross section of the hair bundle per 1 hole:

(1) 0.259 mm ²

(2) 0.454mm2

(3) 0.693mm2

Normal line:

(1) Slotted stainless steel (thickness 0.13mm × length 1.2mm × width 1.3mm)

(2) Slotted stainless steel (thickness 0.13mm × length 1.4mm × width 1.5mm)

(3) Slotted stainless steel (thickness 0.13mm × length 0.8mm × width 1.5mm)

13 shows Example 44 which is a specific example of a toothbrush according to the present invention. In Example 44, the specifications of each part are set as follows.

Material of the head part: Polypropylene (PP) + MILASTOMER (Olefin-based elastomer manufactured and sold by Mitsui Chemicals Co., Ltd. under the trademark "Miratomer")

Hair follicle: approximately rectangular hole (short side 0.65mm × long side 1.30mm × depth 3.2mm), 69 holes

Number of hair bundles per unit planting area: 40 genera / cm ²

Sole: Spiral catch hair in nylon

(1) Head tip = diameter 9mil (0.229mm), 5/1 holes (10/1 holes by number of brushes after folding)

(2) Other parts = 7 mils (0.178mm) in diameter, 7/1 holes (14/1 holes by number of brushes after folding)

Total cross section of the hair bundle per 1 hole:

(1) 0.412 mm ²

(2) 0.348mm ²

Flat wire: Stainless steel (thickness 0.2mm × length 1.5mm × width 2.3mm)

14 shows Example 45 as a specific example of a toothbrush according to the present invention. In Example 45, the specifications of each part are set as follows.

Material of head part: Polyethylene naphthalate (PEN) + plating

Seedling hole:

(1) Round hole (diameter 1.0mm × depth 3.0mm), 2 holes

(2) Approximately rectangular hole (short side 0.65mm X long side 1.30mm X depth 3.2mm), 39 holes

Number of hair bundles per unit planting area: 26 genera / cm ²

Sole: nylon straight hair

(1) 6 mil (0.152mm) diameter, 13/1 holes (26/1 holes by number of brushes after folding)

(2) 6 mil (0.152mm) in diameter, 25/1 holes (50/1 holes by number of brushes after folding)

Total cross section of the hair bundle per 1 hole:

(1) 0.472mm ²

(2) 0.901mm ²

Normal line:

(1) Stainless steel (thickness 0.14mm × length 1.3mm × width 2.3mm)

(2) Stainless steel (thickness 0.14mm × length 1.3mm × width 2.3mm)

15A and 15B show Example 46 which is a specific example of a toothbrush according to the present invention, and specific dimensions of each part of the toothbrush are shown as an example.

16A and 16B show Example 47 which is a specific example of the toothbrush according to the present invention, and specific dimensions of each part of the toothbrush are shown as an example.

In Table 6, another specific example of the toothbrush concerning this invention is shown.

In the table, Examples 48-54 show examples of manual toothbrushes, and Example 55 shows examples of electric toothbrushes, respectively. These toothbrushes all have a condition of the present invention as described above, that is, the sum of the cross-sectional areas of the brushes constituting the hair bundles that have been planted in the tuft holes is 1.0 mm ² or less, and the distance from other tuft holes closest to the at least one tuft hole (recently It is a contact type mohyeol distance) D is the volume (volume of resin destruction of the resin destroyed by 1.0mm or less, and horizontal lines) V is such that more than 0.1mm ^3, 0.4mm ³ or less, set the specifications of each part.

Example
Modus installation matters Other specifications Distance between nearest bristles (mm) Total cross section of hair bundle (mm ² ) Resin Breaking Volume (mm ³ ) 1) Head Material
2) Wool hole (shape, volume ^{* 1} , number)
3) Hair bundle (material, shape, diameter, number)
4) Horizontal line (thickness X length X width, material) Example 48 0.50 0.388 0.37 1) PP + Santoprene ^{* 2}
2) Approx. Rectangular, 0.64 × 1.32 × 3.8mm, 71 holes
3) Nylon, straight sole, 8mil, 6 folded hair bundles
4) 0.15 × 1.60 × 2.0mm, brass Example 49 0.50 0.388 0.16 1) PCTA
2) Oval, 0.64 × 1.52 × 3.0mm, 79 holes
3) Nylon, straight sole, 8mil, 6 folded hair bundles
4) 0.20 × 1.8 × 1.3mm, brass Example 50 0.60 0.388 0.13 1) POM
2) about rectangular, 0.64 × 1.32 × 2.5mm, 64 holes
3) PBT, super brush, 8mil, 6 folded hair bundles
4) 0.15 × 1.70 × 1.0mm, grooved stainless steel Example 51 0.49 0.388 (a) 0.17 (outside)
(b) 0.07 (inside) 1) POM
2) Rectangular, 0.64 × 1.52 × 3.0mm, 74 holes
3) PTT, super brush, 8mil, 6 folded hair bundles
4) 0.20 × 1.80 × 2.0mm, impurity containing brass (outer)
0.15 × 0.80 × 2.0mm, impurity containing brass (inside) Example 52 0.28 (a) 0.259
(b) 0.454
(c) 0.693 (a) 0.16
(b) 0.16
(c) 0.24 1) PCTA + Mistomer ^{* 3}
2) (a) Round, 0.8 mm diameter x 3.5 mm, 2 holes
(b) Round, 1.0 mm diameter × 3.5 mm, 24 holes
(c) Approximately rectangular, 0.64 × 1.32 × 3.8mm, 46 holes
3) (a) Nylon, straight sole, 8 mil, 4 folded hair bundles
(b) Nylon, straight sole, 8 mil, 7 bundles
(a) PTT, straight sole, 19 folded hair bundles
4) (a) 0.13 × 1.2 × 1.3mm, grooved stainless steel
(b) 0.13 × 1.4 × 1.5mm, grooved stainless steel
(c) 0.13 × 0.80 × 1.5mm, grooved stainless steel Example 53 0.50 (a) 0.412
(b) 0.348 0.12 1) PP + Mistomer ^{* 4}
2) Approx. Rectangular, 0.65 × 1.30 × 3.2mm, 69 holes
3) (a) Nylon, spiral catch, 9 mil, 5 bundles of hair (high-tech)
(b) Nylon, spiral catch, 7 mil, 7 folded hairs (other)
(c) PTT, straight sole, 19 folded hair bundles
4) 0.20 × 1.5 × 2.3mm, stainless steel Example 54 0.65 (a) 0.472
(b) 0.901 (a) 0.11
(b) 0.11 1) PEN + coating
2) (a) Round, 1.0 diameter x 3.0 mm, 2 holes
(b) Approx. rectangular, 0.70 × 2.0 × 3.0mm, 39 holes
3) (a) Nylon, straight sole, 6 mil, 13 bundles
(b) nylon, straight sole, 6 mil, 25 bundle
4) (a) 0.14 × 1.3 × 2.3mm, stainless steel
(b) 0.14 × 2.3 × 2.3mm, stainless steel Example 55 0.50 0.837 0.11 1) polyacetal
2) Round, 1.3 diameter x 3.0mm, 32 holes
3) Nylon, straight sole, 8mil, 12 folded hair bundles
4) 0.14 × 1.6 × 2.3mm, stainless steel

Remark:

* 1 single axis x major axis x depth or diameter x depth

* 2 Olefin-based elastomer produced and sold by Advanced Elastomer Systems, Inc. under the trademark `` Santoprene ''.

* 3 polyester-based elastomer produced and sold by Mitsubishi Chemical Corporation in trademark `` Prima Roy ''

* 4 Olefin-based elastomer manufactured and sold by Mitsui Chemicals Co., Ltd. under the trademark `` Mistomer ''

Explanation of symbols

1 head

2 cotton wool

3 seedling hole

4 parallel

5 hairs

6 brush

Studded Depth of B Line

Overlap width of C

D Distance to any of the nearest hair follicles (distance between the most recent hairs)

h width of horizontal line

Length of L

m dotted line

n bent head

P intersection

S planting area

t thickness

T head thickness

Volume of resin in the head portion broken by the V horizontal line (resin breaking volume)

Claims (4)

A toothbrush formed by bridging a plurality of brushes with two hairs in a hair transplantation hole of the head of the hair transplanting surface using a flat line, wherein the number of hairs per unit hair area of the planted hairs is 25 bundles / cm 2 or more, 80 bundles / cm 2 or less In the toothbrush of the flat type | mold type | formula which made the total cross-sectional area of the hair | bristle bundle transplanted per hair-frilling state into 1.0 mm <2> or less, and the distance from the other hair-follicle hole closest to at least one tuft hole to 1.0mm or less, A toothbrush characterized in that the thickness t of the flat line is 0.10 mm or more and less than 0.22 mm, and the resin breakage volume due to the flat line is in the range of 0.1 to 0.4 kPa. The method according to claim 1, A toothbrush having a width h of the flat line of 0.9 mm or more and 2.5 mm or less. delete delete

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