JP2012075725A - Toothbrush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toothbrush that can reduce, as the whole toothbrush, variation in the strength of bristles of the toothbrush having an angle-shaped brush part.SOLUTION: The toothbrush 10 is designed to form a bristled surface 20 of a head part 12 in angle shape by connecting a first inclined surface 20a going up toward the tip, to a second inclined surface 20b going down toward the tip continuously with the first inclined surface 20a. Since the tips of a plurality of bristle tufts 22 bristled in the head part 12 are formed in angle shape along the continuation of the first inclined surface 20a and second inclined surface 20b, the difference of length between the long bristle tufts and short bristle tufts of the bristle tufts 22 bristled to form the brush part 14 in angle shape is reduced in comparison with the case of the head part 12 of not angle shape. Variation in the strength of the bristles 24 can thereby be reduced as the whole toothbrush 10.

Description

  The present invention relates to a toothbrush for cleaning the oral cavity of a living body.

  In general, a toothbrush has a small bundling hair, a head portion in which the bristles are planted, a gripping portion for gripping the toothbrush, and a cross-sectional area connecting the head portion and the gripping portion is small. It consists of a neck. As a method for flocking the hair bundle, for example, by heating and melting one end of the hair bundle, inserting the end portion on the heated and melted side into the flock hole provided in the head portion, and welding to the head portion, As shown in Patent Document 1, there is a method in which a hair bundle in which a plurality of hairs are bundled is folded in two, and the crease portion is fixed to the flock hole of the head portion by a flat line. In the method of flocking shown in the above-mentioned patent document 1, by adjusting the position of the crease, a step can be formed between one end and the other end of the hair bundle to obtain a two-stage flocking state. By performing the tip processing, the degree of freedom of the shape of each hair tip can be increased.

  The toothbrush is used mainly for the purpose of cleaning the oral cavity such as removing plaque adhering to the tooth surface. The shape of the brush portion, particularly the shape of the surface connecting the tips of a plurality of hair bundles implanted in the head portion, has a great influence on the removal of plaque. When the shape of the surface connecting the tips of a plurality of bristles of a toothbrush being produced is roughly classified, the shape of the toothbrush viewed from the side includes a straight type, a convex shape, a concave shape, and the like. There is a point to be improved in the shape of the surface connecting the tips of a plurality of hair bundles of these brush portions, and in the case of a linear type, the contact with the molars and the front teeth and interdental portions having convex curved surfaces and concave portions is bad, The cleaning power is inferior. Further, in the case of the convex and concave types, one of the tongue surface and the cheek surface is easy to clean, but the other is difficult to clean.

  As a toothbrush provided with a brush portion having a shape that improves these points to be improved, for example, as shown in Patent Document 2, the side shape of the upper end portion of the hair bundle row in the length direction of the head portion of the toothbrush is as a whole. There has been proposed a toothbrush provided with a mountain-shaped brush portion that has a triangular shape with the upper end of the bristles at the center as a vertex. By using this toothbrush, it is possible to surely polish areas where the hair bundle of the toothbrush is difficult to reach and hard to polish, such as the interdental part between the crown and the crown, and the neck part of the root of the crown. And a high cleaning effect can be obtained. In addition, a toothbrush having a brush portion whose side shape is a mountain shape like Mt. Fuji as shown in Patent Document 3 has been proposed. With this toothbrush, you can use the normal brushing method for not only normal dentitions but also for irregular dentitions, those who are wearing devices during orthodontic treatment, and those with swollen gums. Cleaning of the tooth surface, interdental portion, tooth neck portion, occlusal surface, and periodontal pocket can be efficiently performed with one toothbrush without pain.

JP 2010-154900 A JP 2006-239045 A Utility Model Registration No. 3143239

  However, toothbrushes equipped with these chevron-shaped brush portions have the longest contact time and the longest bristle at the highest altitude, that is, the apex of the chevron has the longest bristle length. Compared with a toothbrush in which the shape of the brush part is other than the chevron shape, the usable period was short.

  The present invention has been made against the background of the above circumstances, and the object of the present invention is to reduce the variation in the strength of the hair of a toothbrush having a chevron-shaped brush portion as a whole, more preferably the hair. An object of the present invention is to provide a toothbrush that can make the strength of the entire toothbrush uniform.

  In order to achieve such an object, the gist of the first invention is that (a) a longitudinal portion in which a head portion in which a plurality of hair bundles are implanted is provided at the distal end and a grip portion is provided at the proximal end. A toothbrush, wherein (b) the flocked surface of the head portion has a first inclined surface that rises toward the tip, and a second inclined surface that descends toward the tip following the first inclined surface; The tips of the plurality of hair bundles that are formed in a mountain shape by the series and planted in the head portion are in a mountain shape along the series of the first inclined surface and the second inclined surface.

  As described above, according to the first aspect, the flocked surface of the head portion includes the first inclined surface that rises toward the tip, and the first inclined surface that descends toward the tip following the first inclined surface. The tip of the plurality of hair bundles formed in a mountain shape by connecting with the two inclined surfaces, and having the hairs planted in the head portion, has a mountain shape along the connection of the first inclined surface and the second inclined surface It is. In this way, compared to the case where the shape of the head portion is not a mountain shape, the difference in length between the long hair bundle and the short hair bundle planted so that the shape of the brush portion becomes a mountain shape is reduced. Since it becomes small, the dispersion | variation in bristle strength can be made small as a whole toothbrush.

  Here, preferably, tips of a plurality of hair bundles implanted in the head portion are parallel to the flocked surface. If it does in this way, since the length of hair becomes the same as a whole, the hardness of hair will also become the same and the intensity | strength of hair can be made uniform as a whole.

  Preferably, the head portion has a maximum height at a boundary portion between the first inclined surface and the second inclined surface, and is lowered as the distance from the boundary portion increases in the longitudinal direction. In this way, compared to the case where the shape of the head portion is not a mountain shape, the difference in length between the long hair bundle and the short hair bundle planted so that the shape of the brush portion becomes a mountain shape is reduced. Since it becomes small, the dispersion | variation in bristle strength can be made small as a whole toothbrush. In addition, since the mountain-shaped brush portion can be formed without cutting the hair after planting, two-stage planting can be applied.

  Preferably, the plurality of hair bundles are respectively composed of bundles including two kinds of hairs having different flocking lengths or diameters. If it does in this way, since a hair tip will reach | attain between an interdental part, a tooth neck part, etc. where a hair tip is hard to contact | connect with one type of hair, the inside of an oral cavity can be cleaned more cleanly.

  Preferably, the plurality of hair bundles are respectively composed of a bundle of one hair and a bundle of the other hair of two kinds of hairs having different hair lengths or diameters. If it does in this way, since a hair tip will reach | attain between an interdental part, a tooth neck part, etc. where a hair tip is hard to contact | connect with one type of hair, the inside of an oral cavity can be cleaned more cleanly.

  Preferably, the plurality of hair bundles include long hairs that are formed to have a smaller diameter toward the tip, and short hairs that are shorter than the long hair and have a tip or a spherical shape or a flat shape. It is composed of In this way, the long hair can clean the periodontal pocket due to the difference between the length of the long hair and the short hair, and at the same time, the short hair can clean the neck of the tooth, and the tip shape of the long hair and the short hair Due to the difference, the long hair is suitable for cleaning the periodontal pocket and the short hair is suitable for cleaning the cervix, so that the oral cavity can be efficiently cleaned in a short time.

It is a side view which shows the toothbrush of one Example of this invention. It is the side view which expanded and showed the brush part of the toothbrush of the Example of FIG. It is a III-III sectional view of the brush part of the toothbrush of FIG. It is the expanded sectional view which expanded and showed a part of brush part in order to demonstrate the method of planting a hair | bristle bundle in the head part of the toothbrush of the Example of FIG. It is a figure which shows the long hair which is the one end side of the hair which comprises the bristle bundle of the toothbrush of the Example of FIG. It is a figure which shows the short hair which is the other end side of the hair which comprises the bristle bundle of the toothbrush of the Example of FIG. It is a side view of the brush part of the toothbrush which shows the other aspect of the toothbrush of the Example of FIG. 1, and is a figure equivalent to FIG. FIG. 5 is an enlarged cross-sectional view showing a part of the brush portion in an enlarged manner in order to show a state in which a hair bundle is implanted in the head portion of the toothbrush of the aspect of FIG. 7, corresponding to FIG. 4. It is a side view of the brush part of the toothbrush which shows the other aspect of the toothbrush of the Example of FIG. 1, and is a figure equivalent to FIG. It is a view sectional drawing of the brush part of the toothbrush which shows the other aspect of the toothbrush of the Example of FIG. 1, and is a figure equivalent to FIG. It is a view sectional drawing of the brush part of the toothbrush which shows the other aspect of the toothbrush of the Example of FIG. 1, and is a figure equivalent to FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is a side view of the toothbrush 10, FIG. 2 is an enlarged side view of the brush portion 14 of the toothbrush 10 of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. The toothbrush 10 includes a brush unit 14 including a plurality of hair bundles 22 in which a plurality of hairs 24 are bundled, and a head unit 12 in which the plurality of hair bundles 22 are planted on the flocked surface 20, and a gripping unit for gripping the toothbrush 10. 18, and a neck portion 16 having a small cross-sectional area that connects the head portion 12 and the grip portion 18. The head portion 12 has a flocking surface 20 for flocking a plurality of hair bundles 22. As shown in FIG. 2, the flocking surface 20 extends from the neck portion 16 side to the tip of the head portion 12 in the longitudinal direction of the toothbrush 10. The first inclined surface 20a rising as it goes and the second inclined surface 20b descending as it goes toward the tip of the head portion 12 following the first inclined surface 20a are formed in a mountain shape. A mountain shape is formed at the boundary between the surface 20a and the second inclined surface 20b by the connection of the first inclined surface 20a and the second inclined surface 20b. Further, as shown in FIG. 3, the flocked surface 20 is formed so that the thickness of the head portion 12 and the length of the hair bundle 22 are uniform in the width direction of the toothbrush 10. In the present embodiment, the first inclined surface 20a and the second inclined surface 20b of the flocked surface 20 of the head portion 12 are each formed with five rows of flocked holes 26 having a shape as shown in FIG. In addition, the bristles 14 including the head portion 12 and the plurality of bristles 22 are formed by planting the bristles 22 one by one in each flock hole 26.

  The bristles 22 are formed by bundling a plurality of bristles 24 having different shapes at both ends, and one end side of the bristles 24 is processed to have a smaller diameter toward the tip, and the other end side is nothing. It is not processed and is formed on the end surface of a hemispherical surface or a flat surface. The plurality of bristle bundles 22 are formed from the bristles 24 having the same shape throughout the toothbrush 10, and are implanted into the head unit 12 by the method described with reference to FIG. A surface p connecting the tips of the hair bundles 22 is parallel to the first inclined surface 20a and the second inclined surface 20b forming the flocked surface 20, and the mountain shape at the tips of the plurality of hair bundles 22 is the same as that of the first inclined surface 20a. The shape of the brush portion 14 is the same as that of the head portion 12 because the shape is along the mountain shape formed by the connection with the two inclined surfaces 20b.

  FIG. 4 is an enlarged cross-sectional view showing a part of the brush portion 14 in an enlarged manner in order to explain a method of implanting the hair bundle 22 in the head portion 12 of the toothbrush 10 of FIG. The hair bundle 22 is planted in a state of being folded in half, and the fold line 22a of the hair bundle 22 is arranged so that the length from both ends of the hair bundle 22 to the fold line 22a becomes a desired length. It is formed by folding in half. The hair bundle 22 is implanted in a two-stage flocked state in which the length from the fold line 22a to one end of the hair bundle 22 and the length from the other end are different. In this embodiment, the head portion 12 is longer in length. The fold line 22a is inserted into the flocked hole 26 so as to be at the boundary between the first inclined surface 20a and the second inclined surface 20b. After the insertion, by pushing a rectangular piece 28 cut from a flat wire made of a metal piece or a synthetic resin piece toward the fold 22a, the hair bundle 22 is fixed in the flock hole 26, so that the hair bundle 22 is It is flocked. The hair 24 constituting the hair bundle 22 is processed such that the longer hair from the crease 22a is the long hair 24a and the short one is the short hair 24b, and the long hair 24a has a smaller diameter toward the tip as described above. Has been. The plurality of hair bundles 22 are formed with folds 22a at the same position of each hair bundle 22, and the hair bundle 22 is constituted by one kind of hair 24. Therefore, the length of each long hair 24a from the fold 22a is as follows. Similarly, the length of each short hair 24b from the fold 22a is also the same.

  A plurality of flock holes 26 are formed in the head portion 12 in a shape corresponding to the folded hair bundle 22. That is, the shape of the flock hole 26 is formed in accordance with the thickness and number of hairs 24 constituting the hair bundle 22 and the shape of the rectangular piece 28. The rectangular piece 28 has a rectangular parallelepiped shape, and the front surface and the back surface of the rectangular piece 28 in FIG. 4 of the rectangular piece 28 face the inner peripheral surface and the surface of the flocked hole 26 so that the hair bundle 22 does not come out of the flocked hole 26. The folds 22a are pushed in from the opening side on the lower surface of the drawing.

  FIG. 5 is a view showing long hairs 24a of the hairs 24 constituting the hair bundle 22 of the toothbrush 10 of FIG. The process of reducing the diameter toward the tip of the long hair 24a is performed by immersing one end of each hair 24 in a chemical such as alkali before the hair bundle 22 is implanted in the flock hole 26.

  FIG. 6 is a view showing short hairs 24b of the bristles 24 constituting the bristle bundle 22 of the toothbrush 10 of FIG. The short hair 24b is a state in which no processing is performed on the hair. That is, the cross-sectional shape of the short hair 24b is the same regardless of the distance from the tip, and the tip remains the cut when the hair lengths are aligned.

  As described above, according to the toothbrush 10 of the present embodiment, the flocked surface 20 of the head portion 12 is directed to the distal end following the first inclined surface 20a that rises toward the distal end and the first inclined surface 20a. The tips of the plurality of hair bundles 22 formed in a mountain shape by connecting to the second inclined surface 20b that descends along with the head portion 12 are connected to the first inclined surface 20a and the second inclined surface 20b. It is a mountain shape along. In this way, compared to the case where the shape of the head portion 12 is not a mountain shape, the length of the long and short hair bundles of the hair bundle 22 planted so that the shape of the brush portion 14 becomes a mountain shape. Therefore, the variation in the strength of the bristles 24 can be reduced as a whole of the toothbrush 10.

  Further, according to the toothbrush 10 of the present embodiment, the tips p of the plurality of hair bundles 22 implanted in the head portion 12 are parallel to the flocked surface 20. In this way, since the length of each long hair 24a or each short hair 24b becomes the same as a whole, the hardness of each long hair 24a or each short hair 24b also becomes the same, and the strength of each long hair 24a or each short hair 24b. Can be made uniform throughout the toothbrush 10.

  Further, according to the toothbrush 10 of the present embodiment, the head portion 12 has a boundary portion between the first inclined surface 20a and the second inclined surface 20b having a maximum height, and is lowered as the distance from the boundary portion increases in the longitudinal direction. Yes. In this way, compared to the case where the shape of the head portion 12 is not a mountain shape, the length of the long and short hair bundles of the hair bundle 22 planted so that the shape of the brush portion 14 becomes a mountain shape. Therefore, the variation in the strength of the bristles 24 can be reduced as a whole of the toothbrush 10. Further, since the mountain-shaped brush portion 14 can be formed without cutting the hair 24 after the hair transplantation, a two-stage hair transplantation can be applied.

  Moreover, according to the toothbrush 10 of a present Example, the several hair | bristle bundle 22 is each comprised from the bundle | bundle containing two types of bristles, the long hair 24a and the short hair 24b from which the flocked length or diameter differs. If it does in this way, since a hair tip will reach | attain between an interdental part, a tooth neck part, etc. where a hair tip is hard to contact | connect with one type of hair, the inside of an oral cavity can be cleaned more cleanly.

  Moreover, according to the toothbrush 10 of a present Example, the several hair | bristle bundle 22 has one hair | bristle bundle | flux and two other hairs of two types of long hair 24a and short hair 24b from which the flocking length or diameter differs mutually. Each is composed of a bundle of hairs. If it does in this way, since a hair tip will reach | attain between an interdental part, a tooth neck part, etc. where a hair tip is hard to contact | connect with one type of hair, the inside of an oral cavity can be cleaned more cleanly.

  Moreover, according to the toothbrush 10 of the present embodiment, the plurality of bristle bundles 22 have long hairs 24a formed so as to have a smaller diameter toward the tip, and are shorter than the long hairs 24a and the tip shape is spherical or flat. It is comprised from the short hair 24b formed in this way. In this way, the long hair 24a can clean the periodontal pocket due to the difference in length between the long hair 24a and the short hair 24b, and at the same time, the short hair 24b can clean the tooth neck, and the long hair 24a and the short hair 24b can be cleaned. Since the long hair 24a is suitable for cleaning the periodontal pocket and the short hair 24b is suitable for cleaning the cervical part due to the difference in the tip shape of the hair 24b, the oral cavity can be efficiently cleaned in a short time.

  Next, another embodiment of the present invention will be described. In the following description of the embodiments, portions common to the embodiments are denoted by the same reference numerals and description thereof is omitted.

  FIG. 7 is a view showing a toothbrush 30 according to another embodiment of the present invention, and corresponds to FIG. 2 of the first embodiment. In FIG. 7, the brush portion 32 of the present embodiment has a longer length from the fold line 22 a to the end of the hair bundle 22 in the first embodiment, and the first inclined surface 20 a of the flocked surface 20 of the head portion 12. Instead of the brush portion 14 in which the fold line 22a is inserted into the flock hole 26 in a state where it is on the boundary side with the second inclined surface 20b, the hair bundle 22 is rotated by 90 °, and the longer one is the side surface of the toothbrush 30. The hair is implanted so as to be on the front side of the brush portion 32 of the toothbrush 30 in FIG. The other parts are configured similarly.

  FIG. 8 is an enlarged cross-sectional view showing a part of the brush portion 32 in an enlarged manner in order to show a state in which the hair bundle 22 is implanted in the head portion 12 of the toothbrush 30 of FIG. It is a figure corresponding to FIG.

  In the toothbrush 30 of the present embodiment, the brush portion 32 has a flocked surface 20 formed from the first inclined surface 20a and the second inclined surface 20b as in the above-described embodiment, and a plurality of hairs implanted in the head portion 12 are provided. Since the surface p connecting the tips of the hair bundles 22 is formed in a mountain shape, the same effect as in the above-described embodiment can be obtained.

  FIG. 9 is a view showing a toothbrush 40 according to another embodiment of the present invention, and corresponds to FIG. 2 of the first embodiment. In FIG. 9, the head portion 42 of the brush portion 44 of the present embodiment is such that the back surface in the thickness direction of the head portion 12 of the flocked surface 20 in the first embodiment is straight from the neck portion 16 toward the tip of the head portion 12. Instead of the head portion 12 formed to extend, the surface on the back side in the thickness direction of the head portion 42 of the flocked surface 20 has a substantially uniform thickness from the neck portion 16 side to the tip of the head portion 42. It is formed. The other parts are configured similarly.

  In the toothbrush 40 of the present embodiment, the brush portion 44 has a flocked surface 20 formed from the first inclined surface 20a and the second inclined surface 20b as in the above-described embodiment, and a plurality of hairs implanted in the head portion 42. Since the surface p connecting the tips of the hair bundles 22 is formed in a mountain shape, the same effect as in the above-described embodiment can be obtained. Furthermore, since the head portion 42 is thinner than the head portion 12 of the first and second embodiments, a toothbrush having a chevron-shaped head portion can be manufactured with no dents due to sink marks.

  FIG. 10 is a view showing a toothbrush 50 according to another embodiment of the present invention, and corresponds to FIG. 3 of the first embodiment. In FIG. 10, the brush portion 52 of the present embodiment is replaced with the brush portion 14 in which the hair bundle 22 is implanted so that the length of the hair bundle 22 in the first embodiment is uniform in the width direction of the toothbrush 10. In the width direction of the toothbrush 50, the hair bundle is a mountain-shaped shape in which the hair bundle is planted so that the length of the hair bundle becomes longer from the both ends toward the center. The other parts are configured similarly.

  In the toothbrush 50 of the present embodiment, the brush portion 52 has a flocked surface 20 formed from the first inclined surface 20a and the second inclined surface 20b as in the above-described embodiment, and a plurality of hairs implanted in the head portion 12 are provided. Since the surface p connecting the tips of the hair bundles 22 is formed in a mountain shape, the same effect as in the above-described embodiment can be obtained. Furthermore, since the surface connecting the tips of the plurality of hair bundles planted in the head portion 12 in the width direction is formed in a mountain shape, it is possible to more reliably polish the portion of the toothbrush that is hard to reach and hard to brush. It is possible to clean the oral cavity more cleanly.

  FIG. 11 is a view showing a toothbrush 60 according to another embodiment of the present invention, and corresponds to FIG. 3 of the first embodiment. In FIG. 11, the head portion 62 of the brush portion 64 of the present embodiment is a brush portion having a flocked surface 20 formed so that the thickness of the head portion 12 in the first embodiment is uniform in the width direction of the toothbrush 10. The first width direction inclined surface 66aa (the third width direction inclined surface 66ba) and the first width rising in the width direction of the toothbrush 60 from one end of the head portion 62 toward the other end in the width direction of the toothbrush 60. From the second inclined surface 66ab (fourth width direction inclined surface 66bb) descending toward the other end of the head portion 62 following the first inclined surface 66aa (third width direction inclined surface 66ba), in a mountain shape The first width direction inclined surface 66aa (the first width direction inclined surface 66aa (third width direction inclined surface 66ba) and the second width direction inclined surface 66ab (fourth width direction inclined surface 66bb) are formed. 3rd width And it has a flocked surface 66 that mound is formed by a series of the direction inclined face 66Ba) and a second widthwise inclined surface 66Ab (Fourth widthwise inclined surface 66bb). The other parts are configured similarly. In the following description, the first inclined surface 66a is composed of the first width direction inclined surface 66aa and the second width direction inclined surface 66ab of the flocked surface 66 corresponding to the first inclined surface 20a of the above-described embodiment. What consists of the 3rd width direction inclined surface 66ba and the 4th width direction inclined surface 66bb of the flocked surface 66 equivalent to the 2nd inclined surface 20b of an example is made into the 2nd inclined surface 66b.

  In the toothbrush 60 of the present embodiment, the brush portion 64 has a flocked surface 66 formed of a first inclined surface 66a and a second inclined surface 66b, as in the above-described embodiment, and a plurality of hairs implanted in the head portion 62. Since the surface p connecting the tips of the bristles is formed in a mountain shape in the longitudinal direction of the toothbrush 60, the same effect as in the above-described embodiment can be obtained. Furthermore, since the surface connecting the tips of the plurality of hair bundles implanted in the head portion 62 in the width direction is formed in a mountain shape, the portion of the toothbrush 60 that is hard to reach and hard to polish is more reliably polished. And the oral cavity can be cleaned more cleanly. Moreover, compared with the toothbrush 50 of Example 4 in which the shape of a head part is not a mountain shape in the width direction, the long hair bundle of the hair bundle 22 planted so that the shape of the brush part 64 may become a mountain shape in the width direction is short. Since the difference in length from the bristles becomes small, the variation in the strength of the bristles 24 can be reduced as a whole of the toothbrush 10.

  As mentioned above, although the Example of this invention was described in detail with reference to drawings, this invention is implemented also in another aspect.

  For example, in the toothbrushes 10, 30, 40, 50, 60 of the above-described embodiments, the first inclined surfaces 20a, 66a and the second inclined surfaces 20b, 66b of the flocked surfaces 20, 66 of the head portions 12, 42, 62 are In the longitudinal direction of the toothbrushes 10, 30, 40, 50, 60, five rows of flocked holes 26 are formed, but the number of rows is not limited to that number, and the first inclined surfaces 20 a, 66 a and the second The number of rows of the flock holes 26 with the inclined surfaces 20b and 66b may not be the same.

  In addition, the flocked surfaces 20, 66 of the head portions 12, 42, 62 of the toothbrushes 10, 30, 40, 50, 60 of the above-described embodiments have first inclined surfaces 20a, 66a and first The first inclined surfaces 20a, 66a and the second inclined surfaces 20b, 66b descending toward the front end are formed in a mountain shape, but the angles of these inclined surfaces can be freely determined. . Further, the inclined surfaces are not limited to linear surfaces, and may be curved convex surfaces or concave surfaces. The mountain shape may be, for example, the Mt. Fuji type in which a flat surface is provided between the first inclined surfaces 20a and 66a and the second inclined surfaces 20b and 66b.

  Further, the flocked surfaces 20, 66 of the head portions 12, 42, 62 of the toothbrushes 10, 30, 40, 50, 60 of the above-described embodiments are chevron-shaped in the longitudinal direction of the toothbrushes 10, 30, 40, 50, 60. Although formed, it may be formed in a mountain shape in the width direction.

  In addition, the method for flocking the toothbrushes 10, 30, 40, 50, 60 of the above-described embodiment is not limited to the method described with reference to FIG. 4 described above. It is a method in which one end is heated and melted, and the end on the heated and melted side is inserted into the flock hole 26 provided in the head portion 12, 42, 62 and welded to the head portion 12, 42, 62. Also good.

  Further, the bristles 22 of the toothbrushes 10, 30, 40, 50, 60 of the above-described embodiment are implanted in a two-stage flocking state in which the length from the fold line 22a to one end of the bristles 22 and the length from the other end are different. However, the hair may be implanted in a state where the length from the crease 22a to one end of the hair bundle 22 is the same as the length from the other end.

  In addition, the long hair 24a of the bristles 24 of the bristles 22 of the toothbrushes 10, 30, 40, 50, 60 of the above-described embodiment is processed into a shape having a smaller diameter toward the tip, and the short hair 24b is However, as long as the long hair 24a cleans the periodontal pocket and the short hair 24b cleans the tooth neck, the hair may be processed into other shapes.

  In addition, although not illustrated one by one, the present invention can be variously modified without departing from the spirit of the present invention.

10, 30, 40, 50, 60: Toothbrush 12, 42, 62: Head part 18: Grasping part 20, 66: Flocked surface 20a, 66a: First inclined surface 20b, 66b: Second inclined surface 22: Hair bundle 24 : Hair 24a: Long hair 24b: Short hair

Claims (6)

A longitudinal toothbrush in which a head portion in which a plurality of hair bundles are implanted is provided at a distal end and a grip portion is provided at a proximal end,
The flocked surface of the head part is formed in a mountain shape by a series of a first inclined surface that rises toward the tip and a second inclined surface that descends toward the tip following the first inclined surface. ,
A toothbrush characterized in that tips of a plurality of hair bundles planted in the head portion have a mountain shape along a series of the first inclined surface and the second inclined surface.   The toothbrush according to claim 1, wherein tips of a plurality of hair bundles implanted in the head portion are parallel to the flocked surface.   The toothbrush according to claim 1, wherein the head portion has a maximum height at a boundary portion between the first inclined surface and the second inclined surface, and is lowered as the distance from the boundary portion increases in the longitudinal direction. .   The toothbrush according to any one of claims 1 to 3, wherein each of the plurality of bristle bundles is composed of a bundle containing two kinds of bristles having different flocking lengths or diameters.   The plurality of hair bundles are respectively composed of a bundle of one hair and a bundle of other hairs of two kinds of hairs having different hair transplantation lengths or diameters from each other. Any one toothbrush.   The plurality of hair bundles are composed of long hairs that are formed to have a smaller diameter toward the tip, and short hairs that are shorter than the long hair and have a tip shape that is spherical or flat. The toothbrush according to claim 4 or 5, characterized in that.

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