JP7450147B2 - toothbrush - Google Patents

Description

The present invention relates to a toothbrush and aims to solve the following two problems. The first problem is related to removing plaque between teeth and in periodontal pockets, and the second problem is related to keeping the toothbrush itself clean.

First, the background technology for the first problem will be described. Toothbrushes in various forms are currently on the market for the purpose of efficiently removing plaque between teeth and in periodontal pockets, and there are many ideas for toothbrushes in various forms in patent literature. Commercially available products include brushes with flat contact surfaces, wavy brushes, chevron-shaped brushes, and brushes with a mixture of long and short bristles. In addition, the shapes of the tips of individual hair materials vary, such as those cut diagonally, those that are extremely thin, and those that are round.

On the other hand, in patent documents, there are more diverse products than commercially available products, as shown below.
(A) Hair with forked ends (B) Hair with bent ends (C) Hair with looped hair (D) Hair with wave-shaped bends (E) Hair with spherical ends (f) Hair material with unevenness (g) Hair material with flat parts formed (h) Hair material with cuts made to form split ends (k) Split ends on the trunk hair The numerous patent documents provided can be classified as shown above.

Both commercially available products and patent documents have the same purpose of efficiently removing plaque between teeth and in periodontal pockets, but each of these products has a unique tendency. The tendency is that most of the commercial products have straight hair, whereas most of the products of patent documents do not have straight hair. And among the numerous patent documents, there are almost none that have been commercialized and popularized for hair that is not straight.

It is true that non-straight bristles with a variety of shapes are more advantageous in removing plaque from gaps such as between teeth, but most of these patent documents do not It has not yet been commercialized. There are three possible reasons for this:
(b) If the bristle material has split ends, dirt will easily stick to the toothbrush itself, making cleaning difficult. The present invention has focused on these three reasons why toothbrushes with non-straight bristles, which are limited in size, are difficult to commercialize due to their increased manufacturing costs.

Next, the background technology for the second problem will be described. Among the currently popular products on the market, it is rare to see products that take special care to maintain the cleanliness of the toothbrush itself. There are many patent documents related to toothbrush storage containers and support devices, and toothbrush cleaning tools, but there are few related to the structure of the toothbrush itself, and the above-mentioned [Patent Document 20], [Patent Document 21], and [Patent Document 21] Only three patent documents (Reference 22) were noticed.

The contents of these three patent documents are generally as follows.
- A hole is provided in the pedestal on which the bristles are flocked to make it easier to wash away dirt. - The spacing between the bristles is widened to make it difficult for dirt to adhere. - The brush part is cylindrical. These products may have a better cleanliness retention effect than conventional products, but they all have areas where the bristles are densely packed, so they remove moisture by rotating the radial bristles. Its effectiveness is limited because it is unavoidable that it gets tangled easily and is difficult to dry.

Here, the following words and phrases in "" used in this specification will be defined.
"Tooth surface" includes the gingival surface. "Bristles" refers to the bristle material for brushes. In the product of the present invention, the "tip part" consisting of the stem hair and the tip is located at the tip of the stem hair, "Stem hair" is a component of the hair material, which is composed of split ends on the side of the shaft hair. ``Hair length'' refers to the length of the hair, including short, branch-like hairs that are derived from protrusions. ``Straight hair'' refers to the straight hair, and ``pressure'' refers to the length of the hair. The "axis" of the pressure required for removal is the line along the longitudinal direction of the bristle material, and the "angle between the tooth surface and the bristle material" is the line between the tangent line 21 of the tooth surface and the axis 22 of the bristle material in FIGS. 25 and 26. Regarding the angle 23, "the bristles and the tooth surface are perpendicular" means that the angle 23 between the axis 22 of the bristles and the tangent line 21 of the tooth surface in FIG. 25 is 90 degrees, and "the bristles and the tooth surface are parallel" means in FIG. The angle 23 between the axis 22 of the bristles and the tangent line 21 of the tooth surface in FIG. The angle 23 in FIG. 26 is approximately 0 degrees to 20 degrees.

Prior patent documents related to the present invention are shown below. Among these, [Patent Document 1] to [Patent Document 19] are the first problem and are related to the removal of dental plaque between teeth and in periodontal pockets, and [Patent Document 20] to [Patent Document 22] are the first problem. The second issue concerns keeping the toothbrush itself clean.

Japanese Patent Application Publication No. 09-140450 Japanese Patent Application Publication No. 2000-139964 Japanese Patent Application Publication No. 2000-189252 Japanese Patent Application Publication No. 2002-355121 JP2003-225123A JP2007-097850A Japanese Patent Application Publication No. 2009-172344 Japanese Patent Application Publication No. 2010-194071 Jito No. 3110225 Publication Jito No. 3129736 Publication Utility Model Publication No. 05-080324 Utility Model Publication No. 07-023435 Jitszen No. 51-076768 Jitszen No. 56-132938 Jitszen No. 61-097923 Jitszenhei 01-097729 publication Jitszenhei 02-045025 publication Publication No. 42-021925 Publication number 05-031942 Japanese Patent Application Publication No. 2011-015816 Jito No. 3104452 Publication Utility Model Publication No. 06-052550

As mentioned above, the present invention aims to solve the following two problems. The first problem is related to removing dental plaque between teeth, and the second problem is related to maintaining the cleanliness of the toothbrush itself. Below, we will discuss in detail the issues we are trying to solve.

First, we will discuss the first issue. The tooth row has unevenness, grooves, gaps between teeth and periodontal pockets, and has an extremely complex shape, so plaque can be efficiently removed from every corner of these areas. It is difficult to remove. Particularly difficult areas are interdental areas and periodontal pockets. In other words, the interdental and periodontal pockets are narrow and deep spaces, so removing plaque from the side walls of the teeth has been a long-standing challenge for conventional toothbrushes with straight bristles. It has become a challenge. The fact that patients have no choice but to rely on interdental brushes and floss toothpicks shows how difficult it is to remove plaque from these areas.

Generally, in order to efficiently remove dental plaque with a toothbrush, the following two conditions (A) and (B) need to be satisfied.
(A) The tip of the bristles contacts the tooth surface at an angle that is approximately perpendicular to the bristles and the tooth surface. (B) When the bristles make contact, pressure is applied to the tip of the bristles to push the tooth surface. According to this condition (A), ,
(a) The axial rigidity of the bristles is much higher than the bending rigidity, so pressure is applied efficiently to the tooth surface. (b) Pressure is inversely proportional to the pressurized area, so the contact area of the bristles is extremely small, so pressure is applied (c) The tips of the bristles are able to penetrate into the minute recesses on the tooth surface, allowing for thorough cleaning.Three functions work, making it extremely effective in removing plaque.

However, with a toothbrush that uses straight bristles, it is almost impossible to satisfy the above two conditions (A) and (B) in narrow and deep gaps such as between teeth. This is because, as shown in FIGS. 20, 22, and 24, the straight bristles that have entered the gap are forced to be approximately parallel to the tooth surface of the side wall. The bristle material that is parallel to the tooth surface has extremely low bending rigidity, so it is not possible to obtain pressure to push the tooth surface. In other words, with straight bristles, even if the tips of the bristles come into contact with the tooth surface of the side wall, they can only produce the effect of caressing the tooth surface, and cannot achieve the effect of applying pressure and rubbing, so no plaque removal effect can be expected.

Therefore, many of the above-mentioned prior patent documents that do not have straight hair seem to have been invented, and it is true that hair materials with a change in shape by bending, bifurcating, or providing split ends are more straight. Although it is true that they are more advantageous in removing plaque than hair, these documents have the following problems.

In the documents of classifications (A) and (B) above, the tips of the bristles are bifurcated or bent, so the tips of the bristles that have entered the gap come into contact with the tooth surface of the side wall, making the bristles less straight than straight bristles. This works advantageously, but since the bending rigidity of the bristles is low, it is questionable whether the pressure to press the tooth surface can be maintained.

In the documents of classifications (C), (D), (E), (F), and (G), the bristles are looped, waved, or have spherical tips, so that the bristles that get into the gaps can be easily removed. It is more effective than plain straight bristles because the curved and bulbous parts come into contact with the tooth surface of the side wall, but the number of bristles that fit into the gap depends on the width of the gap. As a result, the tooth surface on the side wall is pressurized, but since there are countless recesses in the tooth surface that are smaller than the curved portions and bulbous portions of the bristles, it is possible to thoroughly clean the recesses on the tooth surface on the side wall. I doubt it.

The documents in the above classifications (h) and (k) demonstrate that the provision of split ends in the bristles exhibits a remarkable plaque removal effect. This partially shares the technical idea of the present invention. The four patent documents mentioned above are [Patent Document 2], [Patent Document 7], [Patent Document 12], and [Patent Document 17]. These meet the above two conditions (A) and (B) for obtaining a plaque removal effect, and can be expected to be highly effective in removing plaque. However, they have a flaw that can be said to be fatal to toothbrushes. . In other words, it has both great advantages and disadvantages.

The fatal flaw in the four documents listed in (h) and (e) above is that food particles and dirt tend to adhere to the toothbrush itself, and once they have adhered, it is extremely difficult to remove them. Even with traditional straight-bristled toothbrushes, it can sometimes be difficult to remove dirt that gets stuck near the roots of the bristles. Even with straight hair, it is difficult to remove dirt near the roots of the hair, and it is even more difficult to remove dirt from hair with split ends near the roots. The above-mentioned four documents do not consider or mention this defect at all, and the products of these documents are considered to be unusable because food particles and dirt get entangled in them, making them difficult to clean. This problem is also related to the second problem to be solved by the present invention, which will be described below, which is keeping the toothbrush itself clean.

Next, the second issue, maintaining the cleanliness of the toothbrush itself, will be discussed. Toothbrushes are always exposed to dirt and polishing agents when they are used, so they must be cleaned after each use, but simple cleaning may not be enough to remove dirt. After cleaning, the toothbrush becomes wet and mold and bacteria can easily grow there, so it is extremely important to keep the toothbrush itself clean. A toothbrush with excellent hygiene and cleanliness must be able to sufficiently remove dirt with simple cleaning and dry in a short time.

In general, in conventional toothbrushes like those shown in Figures 15 and 16, the area near the tip of the bristles, which is the contact surface of the brush part, is easy to clean and dirt can be removed with relatively simple washing, but the area near the base is easy to clean. Cleaning may not remove dirt. In other words, the bristles of conventional toothbrushes are bundled to form a tuft, and the root of the tuft is pushed into the hole in the pedestal and implanted, so the bristle material sticks tightly and is densely packed near the root. be. Dirt that clings to such areas and clings to them may not be removed by simple cleaning.

In addition, near the roots of the bristles of conventional toothbrushes and in the holes in the pedestal, the bristles are densely packed and adhere to each other, and there are countless minute gaps. Even if your clothes look clean after cleaning, in reality, invisible dirt and bacteria remain in the crevices. The area near the root of the hair clump tends to be damp and difficult to dry, making it a potential breeding ground for mold and bacteria. The discoloration near the roots of the bristles on slightly old toothbrushes is due to the buildup of dirt, mold, and bacterial growth that are visible to the eye. In conventional toothbrushes that form bristles and implant bristles, uncleanness and unsanitary conditions near the roots of the bristles are a structural problem that can be said to be fate. The present invention attempts to solve all the problems mentioned above.

Since the following solving means solves the two problems of the present invention at once, the solving means will be described without dividing them into the first and second problems of the present invention.

In general, the cleaning function of a toothbrush exists only near the tip of the bristles, which is the contact surface of the brush, both in the product of the present invention shown in FIG. 1 and in the conventional product shown in FIG. Therefore, there is almost no presence near the root. Therefore, even if the split ends that act to remove plaque are only near the tips, the cleaning function is not impaired at all. In other words, the split ends that work to remove plaque only need to be present near the tip of the bristles, and are not needed anywhere other than the tip. This brings about a great deal of trouble. Therefore, the toothbrush of the present invention is configured such that the split ends are provided only near the tip of the bristle material, and are not provided anywhere other than near the tip.

The above-mentioned bristle material does not form hair bundles and is planted independently at intervals, thereby reducing the crowding and close contact of the bristle material, which causes uncleanness and unsanitary conditions. Avoided. However, if the hair materials are planted independently without bundling, it becomes difficult to secure the hair density. In the conventional toothbrushes shown in FIGS. 15 and 16, the structure of a bristle bundle made of bundled bristle materials has the function of ensuring the stiffness of the bristles. In other words, even if the hair is thin and has a weak stiffness, it can be tied up to increase its rigidity and maintain its stiffness. This tuft of bristles is not only convenient for manufacturing conventional toothbrushes, but also greatly helps in maintaining the elasticity of the bristles. The bristle material needs to have an appropriate stiffness; if the bristles are weak, it will not be possible to apply pressure to rub the tooth surface, and it will be difficult to insert the bristles into interdental spaces or periodontal pockets. Therefore, the hair material of the present invention is tapered so that the tip is thin and the base is thick so that the hair stiffness can be ensured even if the hair material is implanted independently without forming a hair bundle. The basic concept of the solution of the present invention has been described above, and the specific configuration will be described below based on the drawings.

A toothbrush 1 according to the present invention has a configuration as shown in FIGS. 1 to 6. That is,
A toothbrush 1 in which a brush bristle material 4 is implanted in a pedestal 13 of a head part 3,
As shown in FIGS. 7 and 8, the brush bristle material 4 has a structure in which a tip portion 10 is provided on the trunk hair 5,
The stem hair 5 has a tapered shape with a thin tip 8 and a thick root 9 in order to obtain an appropriate length.
As shown in FIG. 8, the tip portion 10 is located at the tip 8 of the stem hair 5,
As shown in FIGS. 9 and 10, the tip portion 10 has a structure in which a plurality of split ends 6 are derived from the side surface of the trunk hair 5,
The split ends 6 are substantially orthogonal to the side surface of the trunk hair 5 and are provided radially around the side surface of the trunk hair 5,
As shown in FIGS. 8 and 10, the length of the split ends 6 is gradually shortened toward the tip 8 and the root 9.
In order to prevent dirt from adhering to the vicinity of the root 9 of the stem hair 5, the length of the tip portion 10 is limited to approximately 20 % to approximately 50% of the length of the stem hair 5 including the tip portion 10. can be,
As shown in FIGS. 2, 5, and 6, the brush bristle materials 4 are placed on the pedestal of the head portion 3 of the toothbrush 1 independently, with a space 14 between each bristle to avoid crowding or close contact. A plurality of them are arranged in 13. The present invention is a toothbrush 1 characterized by the above configuration.

As shown in FIGS. 11 and 12, the length of the split ends 6 may be shortened and the split ends 6 may be formed into protrusions 6a,
Further, as shown in FIGS. 13 and 14, the height of the protrusion 6a is further reduced, the protrusion 6a is made into a convex convex part 6b, and the tip part 10 has an uneven side surface at the tip 8 of the stem hair 5. It may also have a solid shape.

The toothbrush of the present invention solves the above two problems at once by having the above-described configuration. In other words, the structure of the bristles is such that split ends are placed only at the tip, which has a cleaning function, and not near the roots, where it is difficult to remove dirt. The structure of the brush part, in which the bristles are planted independently at intervals without forming bundles, and the shape of the trunk hairs, which are tapered toward the roots to ensure the stiffness of the hair, are unique to this book. This is the most important component of the invention, and as a result, a toothbrush with strong bristles and excellent plaque removal and cleanliness maintenance effects was realized. The details of this effect are described below.

First, the effects of the means for solving the first problem, the problem of removing dental plaque, will be described. Since the hair material of the present invention has split ends perpendicular to the trunk hair as shown in FIG. Even if they are parallel to the surface, the split ends will be perpendicular to the tooth surface. As shown in FIG. 21, since the number of bristles corresponding to the width of the gap enters, pressure is generated on both opposing tooth surfaces to push each other against each other, like action and reaction. The function is similar to that of using different sizes of interdental brushes depending on the width of the space between the teeth. In other words, rather than lightly stroking the side walls between the teeth, it acts as if applying pressure and rubbing. The split ends of the bristles satisfy the two conditions (A) and (B) mentioned above, so it is extremely effective in removing plaque from the spaces between teeth, even without using interdental brushes or thread picks. A toothbrush that demonstrates this has been realized.

In order to make the above situation easier to understand, FIGS. 18, 21, and 23 show the state in which the bristle material of the toothbrush of the present invention has entered between the teeth. The difference can be better understood by comparing this with FIGS. 20, 22, and 24, which show the state in which the bristles of a conventional toothbrush are inserted between the teeth. Of course, as shown in FIG. 17, the toothbrush of the present invention can not only remove plaque between teeth and periodontal pockets, but also brush the entire dentition and massage the gums in the same way as a conventional toothbrush.

Next, the effects of the means for solving the second problem, that of maintaining the cleanliness of the toothbrush itself, will be described. Although the bristle bundles of conventional toothbrushes are necessary for the production of toothbrushes and to ensure the consistency of the bristles, they cause the bristle materials to become dense and close together, which is the source of uncleanness and unsanitary conditions. The hair materials do not form hair bundles, but are planted independently at intervals. By tapering the stem hair, it is now possible to maintain firmness without forming hair bundles. By eliminating the hair clumps, it is possible to eliminate crowding and adhesion near the roots of the hair material, making it difficult for dirt to get entangled near the roots, allowing dirt to be sufficiently removed with simple washing, drying in a short time, and preventing mold and mildew. We have created an extremely hygienic toothbrush that is resistant to the occurrence of bacteria and the propagation of bacteria.

However, since split ends are densely packed near the tip of the bristle material, there is a concern that dirt may easily adhere to it. However, unlike the tightly packed state of split ends near the root of the hair bundle, the split ends in this area are only lightly touching each other, and can be easily separated by gentle handling. can. Moreover, since the area near the tip of the bristles is easy to clean, it can be easily cleaned by gently brushing the contact surface of the brush part with your fingertips, as shown in Figure 27, and dirt can be removed with simple cleaning. Can be removed completely.

The present invention has solved two major problems that conventional toothbrushes have had for a long time, and created a toothbrush that can be considered ideal, but one problem remains. Only one of the three reasons hindering commercialization mentioned in paragraph number [0005] above could not be resolved. The problem is increased costs, and because the product of the present invention has no bristle bundles, conventional bristle-planting machines cannot be used in the toothbrush manufacturing process. Although I have purposely mentioned the disadvantage of increased cost of the present invention, the choice between the merits of the present invention and the merits of the present invention must be determined based on the values of the manufacturer and the user. This disadvantage of increased costs can be overcome through technological innovation.

It has been more than 100 years since the basic structure of the conventional toothbrush, which forms bristles and implants hair, was created.Since then, manufacturing technology, manufacturing machinery, and material development have made remarkable progress and development, but the basic structure of the toothbrush itself The configuration has not changed at all. The bristle strands, which are a component of conventional toothbrushes, are extremely important both in terms of manufacturing and functionality, and even though they are a source of uncleanness and hygiene, they still exist untouched. It is. Ultra-fine processing technology has progressed, high-performance 3D printers have been developed and put into practical use, manufacturing technology has made dramatic progress and development, and material research has also made dramatic progress and development, and the hair material has become pig hair. From natural materials such as hair and horsehair, to superior man-made materials such as nylon and polyester, and even dream-like new materials such as cellulose nanofiber are being developed. In today's world, where we have achieved dramatic progress and development in various fields through breakthroughs that overcame conventional wisdom and preconceived notions, things that were thought to be impossible have become possible. It seems that toothbrushes are no exception.

The present invention was created as a result of thorough pursuit of the cleaning function and cleanliness that are originally required of a toothbrush, and it is no exaggeration to say that it is a new next-generation toothbrush with a completely different structure from conventional types. Values and needs change with the times. It is conceivable that this configuration without hair bundles will become the norm in the future. Both producers and consumers must become more aware of the fact that this hair bundle has an extremely negative impact on hygiene. In other words, there is a latent but extremely high need for hygiene. If hair clumps can be eliminated by any means of the present invention, the hygienic benefits brought about by this will be immeasurable.

Furthermore, the present invention brings about another great effect in addition to the above-mentioned effects. In other words, the toothbrush of the present invention provides a different level of feel in use that cannot be experienced with conventional toothbrushes that use straight bristles. In other words, you can feel the bristles with split ends getting into the space between your teeth and scraping away plaque. Further, since the thickness of the stem hair of the hair material of the present invention can be slightly changed in each part from the tip to the root, there is a high degree of freedom in setting the hair thickness. In addition to the simple settings of a conventional toothbrush, such as normal, hard, and soft, a wide variety of settings are possible. For example, it is not difficult to create a toothbrush that is soft to the touch, yet strong. According to the present invention, a toothbrush with three features that is excellent in terms of function, hygiene, and feel has been realized. Comfort and texture are also important factors in toothbrushes.

A schematic perspective view of main parts of an embodiment of the present invention A schematic enlarged perspective view of a head portion according to an embodiment of the present invention A schematic plan view of main parts of an embodiment of the present invention A schematic side view of main parts of an embodiment of the present invention A schematic enlarged plan view of a head portion according to an embodiment of the present invention A schematic enlarged side view of a head portion according to an embodiment of the present invention A schematic plan view of a bristle material according to an embodiment of the present invention A schematic side view of a bristle material according to an embodiment of the present invention A schematic enlarged plan view of the tip of the hair material according to the embodiment of the present invention A schematic enlarged side view of the tip of the hair material according to the embodiment of the present invention A schematic enlarged plan view of a tip portion in which split ends are protrusions according to an embodiment of the present invention A schematic enlarged side view of a tip portion in which split ends are protrusions according to an embodiment of the present invention A schematic enlarged plan view of the tip portion where the split ends are convex portions according to the embodiment of the present invention A schematic enlarged flat side view of the tip portion where the split ends are convex portions according to the embodiment of the present invention Schematic side view of main parts of conventional product A schematic enlarged perspective view of the head of the conventional product Schematic diagram of the usage of embodiments of the invention A schematic diagram of how the bristles are inserted between the teeth in the usage situation of the embodiment of the present invention Schematic diagram of usage status of conventional product Schematic diagram of how the bristle material is inserted between the teeth when using the conventional product A schematic enlarged view of how the bristle material according to the embodiment of the present invention is inserted between teeth A schematic enlarged view of the conventional bristles inserted between the teeth A schematic enlarged view of the bristle material according to the embodiment of the present invention inserted into a periodontal pocket A schematic enlarged view of the conventional bristles inserted into a periodontal pocket Enlarged diagram showing general bristles in contact with the tooth surface almost perpendicularly Enlarged diagram showing general bristles in contact with tooth surfaces approximately parallel to each other An explanatory diagram showing the brush part of the embodiment of the present invention being handled with a fingertip

The embodiment of the toothbrush 1 of the present invention has an appearance as shown in FIGS. 1 to 6, and the overall size and material are the same as those of a general conventional toothbrush 1a. What changes is the configuration of each individual bristle material 4 and the state in which the bristle material 4 is planted.

As shown in FIGS. 7 and 8, the brush bristle material 4 of the present invention has a structure in which a tip portion 10 is provided at the tip 8 of the trunk hair 5. The structure is such that a plurality of split ends 6 are arranged radially around the side surface of the trunk hair 5 and substantially perpendicular to the side surface of the trunk hair 5 . As shown in FIG. 8, the length of the tip portion 10 is a limited range of approximately 20% to approximately 50% of the total length of the stem hair 5 including the tip portion 10. In order to prevent dirt from adhering to the vicinity of the root 9, the length of the tip portion 10 is limited to this range. In other words, the area where the split ends 6 are provided is limited to only the tip 8, which is the tip section 10, and the split ends 6 are not provided near the root 9, where it is difficult to get dirt attached.

As shown in the enlarged views of FIG. 2, FIG. 5, and FIG. 6, the brush bristle material 4 having the above structure is not tied together in order to avoid crowding and close contact, but is carried out individually. A plurality of them are planted on the pedestal 13 of the head portion 3 of the toothbrush 1 at intervals of 14 from each other. In order to compensate for the loss of stiffness due to the brush bristles 4 being planted independently, the stem bristles 5 are tapered so that the tip 8 is thin and the root 9 is thick, as shown in FIG.

The length of the split ends 6 can also be shortened to form a shape like a protrusion 6a. A plan view of this configuration is shown in FIG. 11, and a side view is shown in FIG. 12. Furthermore, the height of the protrusion 6a may be reduced to form a shape similar to a convex portion 6b. A plan view of the configuration is shown in FIG. 13, and a side view is shown in FIG. Further, the tapered shape of the trunk hair 5 may be a linear taper shape in which the thickness changes linearly, an exponential taper shape or a parabolic taper shape in which the thickness changes in a curved manner, and various shapes can be selected. A tapered shape in which the thickness changes in a curved line allows for a wider variety of hair waist settings than a linear taper shape in which the thickness changes linearly.

The structure of the bristle material in which split ends are arranged only at the tip, like the bristle material of the present invention, can be used not only for toothbrushes but also for other cleaning tools, such as brooms, general cleaning, and cleaning brushes. Applicable. It is especially suitable for cleaning tools that clean deep depressions, holes, grooves, gaps, nets, and lattice-like objects, and is extremely effective in removing dirt from the side walls of these objects, making it difficult for dirt to adhere to the tools themselves. We can provide clean and highly functional cleaning tools.

A perspective view of an embodiment of the toothbrush 1 of the present invention is shown in FIG. 1, and an enlarged perspective view of the head portion 3 is shown in FIG. The external dimensions are similar to those of a general conventional toothbrush 1a, and the length of the bristles 4 is 12 mm. The length of the tip portion 10 is 3.5 mm, and the thickness is 1.6 mm, which gradually tapers toward the tip. The thickness of the split ends 6 is 0.1 mm, the length is 0.7 mm, and they are gradually shortened toward the tip. The tip 8 of the trunk hair 5 has a thickness of 0.2 mm, and the root 9 has a tapered shape of 0.7 mm. The spacing 14 between the bristle materials 4 to be planted is 1 mm, and the number of bristle materials 4 to be planted is 8 rows vertically and 20 rows horizontally, and is 160 in total.

The number, thickness, and length of the split ends 6 provided on the tip portion 10, the thickness of the tip and root of the stem hair 5, the width of the interval 14 at which the hair material 4 is planted, and the hardness of the material are variously set. It is possible to create a wide variety of variations, and it is possible to precisely respond to user preferences. The above values are given as examples that are considered appropriate, but it is necessary to more optimally select the thickness of the bristles, the spacing between the bristles, and the number of bristles depending on the hardness of the material used for the bristles. . The numerical values described above, as well as the drawings, do not limit the technical scope of the present invention.

1 Toothbrush main body of the present invention 1a Conventional toothbrush main body 2 Brush portion 3 Head portion 4 Brush bristle material of the present invention 4a Conventional brush bristle material 5 Trunk hair 6 Split hair 6a Protrusion 6b Convex portion 7 Contact surface 8 Tip 9 Root 10 Tip 11 Hair bundle 12 Tip 13 Pedestal 14 Interval 15 Teeth row 16 Teeth 17 Interdental space 18 Periodontal pocket 19 Gingiva 20 Tooth surface 21 Tangent to tooth surface 22 Axis of bristles 23 Tangent to tooth surface and hair Angle of the axis of the material

Claims (1)

A toothbrush in which brush bristle material (4) is implanted in a pedestal (13) of a head portion (3),
The brush bristle material (4) has a structure in which a tip portion (10) is provided on the trunk bristles (5),
The stem hair (5) has a tapered shape with a thin tip (8) and a thick root (9).
The tip portion (10) is located at the tip (8) of the stem hair (5),
The tip portion (10) has a structure in which a plurality of split ends (6) are provided on the sides of the trunk hair (5),
The split ends (6) are substantially perpendicular to the side surfaces of the trunk hairs (5) and are arranged radially around the side surfaces,
The length of the split ends (6) is gradually shortened towards the tip (8) and the root (9).
The length of the tip portion (10) is limited to approximately 20 % to approximately 50% of the length of the stem hair (5) including the tip portion (10),
A toothbrush characterized in that a plurality of brush bristle materials (4) are disposed on a pedestal (13) of a head portion (3) independently and spaced apart from each other (14).

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