JP2019208972A - toothbrush - Google Patents

Abstract

To provide a toothbrush which further increases dental plaque removing effects of an interdental part by enhancing stability when a tuft with a high bristle height enters the interdental part.SOLUTION: In an intermediate part bristle implanting region 17b, a plurality of protruding bristle bundles 15a with a high bristle height are implanted by dispersing them. In a tip end side bristle implanting region 17a and a rear end side bristle implanting region 17c, a taper bristle bundle 15b, 15c formed by bundling a taper bristle 16b, 16c is implanted. The taper bristle 16b, 16c of the taper bristle bundle 15b, 15c implanted in the tip end side bristle implanting region 17a is implanted with a bristle height shorter than the bristle 16a of the protruding bristle bundle 15a. A virtual tip end side brush surface 18a formed by continuously arranging the tip ends has a height different part 18b in which a tip end side of a bristle implanting base 11 in a longitudinal direction X is higher than an end edge part on the side of the intermediate part bristle implanting region 17b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a toothbrush, and more particularly, to a toothbrush in which hair bundles formed by bundling a plurality of bristles are respectively implanted in a plurality of flock holes formed in a flocking table.

  Toothbrushes are planted by tufts (hair bundles) made by bundling a plurality of bristles, for example, by inserting a flat wire into a plurality of flock holes formed on the flocking surface of a flocking table or by fusing with heat. It is formed by fixing. In addition, the toothbrush efficiently performs appropriate brushing according to the type of teeth such as the front teeth and back teeth, and the parts of the teeth such as the interdental part, tooth surface part, tooth neck part, and back part of the tooth, and the like. Various arrangements have been made to the arrangement of the hair bundles, the shape of the bristle tips, and the like so that the hair can be effectively removed and a good feel can be obtained at the time of brushing.

  For example, as a toothbrush that facilitates the entry of the tuft into the interdental part and allows the interdental part to be efficiently cleaned, in the inner region of the tufts of the outermost row on both sides planted on the outermost side of the flocking table, A toothbrush provided with a row of tufts having a higher bristle length than the tuft of the outermost row is disclosed (for example, see Patent Document 1). In addition, a toothbrush is disclosed in which a plurality of rows of protruding hair bundles having a high bristle height are implanted to enhance the plaque removal effect at the interdental portion (see, for example, Patent Document 2).

JP 2001-309819 A JP 2006-167435 A

  According to the conventional toothbrush in which rows of tufts with high bristle length are implanted, it is possible to make the tufts with high bristle length easy to enter the interdental area and to efficiently perform the interdental brushing. However, in order to further enhance the plaque removal effect at the interdental part, it is desirable to improve the stability when a tuft having a high bristle length enters the interdental part.

  The present invention relates to a toothbrush capable of improving the stability when a tuft having a high bristle length enters an interdental part and further enhancing the plaque removing effect of the interdental part.

  The present invention is a toothbrush in which hair bundles formed by bundling a plurality of bristles are respectively planted in a plurality of flock holes formed in a flocking table, and the flocking table has a distal end side at a distal end side in the longitudinal direction. A flocked region, a rear end side flocked region in the longitudinal direction rear end side, and an intermediate flocked region between the front end side flocked region and the rear end side flocked region. A plurality of high-length protruding hair bundles are distributed and planted, and each of the front end side flocked region and the rear end side flocked region has a plurality of taper-shaped portions with reduced cross-sectional areas toward the front end. A taper bristle bundle is formed by bundling a taper bristle, and the taper bristle forming the taper hair bundle planted in the tip side hair transplantation region is 0 than the bristle forming the protruding hair bundle. It is planted with ~ 2mm lower hair length Both of the virtual tip side brush surface formed by connecting the tip has a height difference portion where the longitudinal tip end side of the flocking table is higher than the end edge portion on the intermediate hair transplantation region side, In the intermediate hair transplantation region, a hairbrush having a hair length lower than the protruding hair bundle is implanted with the protruding hair bundle.

  According to the toothbrush of the present invention, it is possible to improve the stability when a tuft having a high bristle length enters the interproximal portion, and to further enhance the plaque removing effect of the interproximal portion.

The structure of the principal part of the toothbrush which concerns on preferable one Embodiment of this invention is demonstrated, (a) is a side view, (b) is a top view. It is a schematic side view explaining the bristle of the shape twisted helically. It is a side view explaining the structure of the principal part of the toothbrush which concerns on other embodiment.

  As shown in FIGS. 1A and 1B, a toothbrush 10 according to a preferred embodiment of the present invention is a toothbrush body comprising a gripping part (not shown), a flocking table 11, and a neck part 12 connecting them. A plurality of bristles 16a, 16b, 16c, 16d are bundled in a plurality of flocking holes 14a, 14b, 14b ′, 14c, 14c ′, 14d (see FIG. 1 (b)) formed in the thirteen flocking tables 11. The hair bundles (tufts) 15a, 15b, 15c, and 15d (see FIG. 1 (a)) are respectively implanted (planted). The toothbrush 10 of the present embodiment improves the stability when a plurality of protruding hair bundles 15a implanted in the intermediate hair transplantation region 17b, which is a tuft having a high bristle length, enter the interdental region during brushing. , It has a function to further enhance the plaque removal effect of the interdental part.

  In the toothbrush 10 of the present embodiment, a plurality of flock holes 14a, 14b formed in the flock base 11 are bristles 15a, 15b, 15c, 15d formed by bundling a plurality of bristles 16a, 16b, 16c, 16d. , 14b ′, 14c, 14c ′, and 14d, the hair transplant table 11 includes a front-side flocked region 17a on the front end side in the longitudinal direction X and a rear end side on the rear end side in the longitudinal direction X. A flocked region 17c and an intermediate flocked region 17b between the front end side flocked region 17a and the rear end side flocked region 17c are provided. A plurality of protruding hair bundles 15a having high bristle height are distributed and planted in the intermediate hair transplantation region 17b. Tapered hair bundles 15b and 15c formed by bundling a plurality of tapered bristle 16b and 16c having a tapered portion with a reduced cross-sectional area toward the tip are planted in the front end side flocked region 17a and the rear end side flocked region 17c. It is installed. The tapered bristle 16b, 16c forming the tapered hair bundle 15b, 15c planted in the distal-side hair transplantation region 17a is implanted with a hair length lower by 0 to 2 mm than the bristle 16a forming the protruding hair bundle 15a. An imaginary tip side brush surface 18a formed by connecting the tips has an elevation difference portion 18b that is higher toward the tip end side in the longitudinal direction X of the flocking table 11 than the end edge portion on the intermediate portion flocking region 17b side. Have. An intermediate auxiliary hair bundle 15d having a hair length lower than that of the protruding hair bundle 15a is implanted in the intermediate hair transplantation area 17b together with the protruding hair bundle 15a.

  Moreover, in this embodiment, the taper bristle 16b and 16c which form the taper hair | bristle bundle 15b and 15c planted by the front end side hair-planting area | region 17a has a taper degree rather than the bristle 16a which forms the protrusion hair | bristle bundle 15a. It is high. Here, the taper degree of the taper bristle is a value specified by the length of the taper portion, that is, the length from the end of the taper to the start position of the taper. The starting position of the taper is a position where the diameter of the bristle is 95% with respect to the non-tapered portion.

  In the present embodiment, the toothbrush body 13 can be formed using a commonly used synthetic resin without any particular limitation. For example, selected from polypropylene, polyacetal resin, polystyrene resin, polyethylene terephthalate resin, acrylonitrile butadiene styrene resin, cellulose propionate resin, polyarylate resin, polycarbonate resin, acrylonitrile styrene resin, polyester, polytrimethylene terephthalate, polycyclohexanedimethylene terephthalate It is preferable to use one kind or two or more kinds of resins. The flocking table 11 constituting the tip portion of the toothbrush body 13 is preferably provided with a flat track-circular flocking surface 11a, which opens to the flocking surface 11a, and the bristles 15a, 15b, 15c, 15d are implanted. A plurality of flocked holes 14a, 14b, 14b ', 14c, 14c', 14d are formed.

  In the present embodiment, in the middle portion flocking region 17b of the track-shaped flocking surface 11a of the flocking table 11, two rows are arranged in the longitudinal direction X of the flocking table 11, and a circular shape having a size of, for example, φ1.0 mm is provided. The intermediate portion small-diameter flock holes 14a are dispersedly formed at a total of eight locations, four in each row. In addition, these intermediate portion small diameter flocking holes 14a are located in the middle portion flocked region with a center-to-center spacing of 2.5 to 5 mm between the intermediate small diameter flocking holes 14a adjacent to the longitudinal direction X of the flocking table 11. 17b is formed in a distributed manner. As a result, the protruding hair bundles 15a to be implanted in the intermediate portion small-diameter flocking holes 14a are less likely to concentrate in one place at the time of brushing, so that the individual protruding hair bundles 15a can easily enter the interdental region, It is possible to improve the plaque removal effect at the interdental part.

  In addition, in the intermediate portion flocking region 17b of the flocking surface 11a of the flocking table 11, the outer portions on both sides in the width direction Y of the flocking table 11 across the two rows of the intermediate small diameter flocking holes 14a, and the two rows of the intermediate small diameter planting. In a portion between the pores 14a, arranged in three rows, for example, a circular intermediate flocking hole 14d having a size of φ1.6 mm is provided in a row in the longitudinal direction X of the flocking table 11 and three in each row. , Are distributed and formed in a total of nine places. The intermediate portion flocking holes 14d arranged continuously in each row are positioned in the longitudinal direction X of the intermediate portion small diameter flocking holes 14a and the flocking table 11 so as to be arranged in a staggered manner with the intermediate small diameter flocking holes 14a. It is formed by shifting.

  In the tip side flocking region 17a of the flocking surface 11a of the flocking table 11, there are three outer flocking holes 14b having a circular tip portion having a diameter of, for example, φ1.6 mm on the outside (tip side) in the longitudinal direction X of the flocking table 11. It is arranged and formed at a location. The three tip end outer flock holes 14b are arranged so that the center tip outer flock holes 14b are shifted to the tip side from the tip outer flock holes 14b on both sides. Further, in the tip side flocked region 17a, for example, a circular tip portion inner flocking hole 14c having a size of φ1.6 mm is formed at three locations on the inner side in the longitudinal direction X of the flocking table 11 (on the intermediate portion flocked region 17b side). ing. The three tip end inner flock holes 14c are arranged so that the center tip portion inner flock hole 14c is shifted to the tip side from the tip end inner flock holes 14c on both sides, similarly to the tip outer flock hole 14b. Is formed.

  In the rear end side flocking region 17c of the flocking surface 11a of the flocking table 11, on the outer side (rear end side) in the longitudinal direction X of the flocking table 11, a circular rear end outer flocking hole 14b having a size of φ1.6 mm, for example. 'Is formed in three places. The three rear end outer flocking holes 14b 'are formed such that the central rear end outer flocking hole 14b' is arranged so as to be shifted to the rear end side from both rear end outer flocking holes 14b '. Yes. Further, in the rear end side flocked region 17c, there are three circular rear end inner flock holes 14c ′ having a size of φ1.6 mm, for example, on the inner side in the longitudinal direction X of the flock base 11 (on the intermediate flocked region 17b side). Is formed. The three rear end inner flocking holes 14 c ′ are formed by being arranged in a straight line in the width direction Y of the flocking table 11.

  In the present embodiment, these flock holes 14a, 14b, 14b ', 14c, 14c', 14d have a number corresponding to the cross-sectional area of each flock hole 14a, 14b, 14b ', 14c, 14c', 14d. Hair bundles 15a, 15b, 15c, 15d formed by bundling bristle 16a, 16b, 16c, 16d are inserted, fixed, and implanted. The bristle 16a, 16b, 16c, 16d constituting each hair bundle 15a, 15b, 15c, 15d is preferably made of a synthetic resin. As the synthetic resin for forming the bristle 16a, 16b, 16c, 16d, various known resins used for the bristle can be used without particular limitation. For example, nylon (registered trademark), nylon 6-12, etc. Polyamides, polyesters such as polybutylene terephthalate, polyolefins and the like.

  As a method for implanting the hair bundles 15a, 15b, 15c, 15d in the respective flocking holes 14a, 14b, 14b ', 14c, 14c', 14d, various known flocking methods can be employed. For example, (1) a method in which a hair bundle is folded in half with a flat wire, and (2) one end of the hair bundle is heated to form a molten lump, and then a molten resin is placed in a mold in which the molten lump is disposed. (3) an insertion step of inserting a hair bundle into the flocked hole of the flocked base having a flocked hole (through hole), and one end portion of the hair bundle protruding from the flocked hole. A method of obtaining a flocking table or toothbrush in which a hair bundle is implanted can be used through a heat processing step for forming a molten lump by heating and a covering step for covering the molten lump.

  The filling rate of the hair bundles 15a, 15b, 15c, 15d into the flock holes 14a, 14b, 14b ', 14c, 14c', 14d (total cross-sectional area of the bristle / cross-sectional area of the flock holes) is 60 to 90%. It is preferable that it is 65 to 90%.

  In this embodiment, the eight intermediate portion small-diameter flock holes 14a formed by being distributed and arranged in the intermediate portion flocking region 17b are made of, for example, polybutylene terephthalate and have a diameter of 12 having a diameter of 0.203 mm. The protruding hair bundles 15a formed by bundling the book bristle 16a are respectively implanted so as to have a hair length of 12.5 mm, for example. Thus, the protruding hair bundle 15a is implanted with the tip protruding upward from the other hair bundles 15b, 15c, 15d.

  Further, in this embodiment, the bristle 16a forming the protruding hair bundle 15a is a spiral hair preferably having a helically twisted shape, as shown in FIG. 2, and is preferably cut toward the tip. The taper bristle is provided with a tapered portion having a taper degree lower than that of the taper bristle 16b, 16c of the taper hair bundle 15b, 15c having a reduced area. Since the bristle 16a forming the protruding hair bundle 15a is a spiral hair, it becomes possible to efficiently entangle the food residue and dirt clogged between the interdental portions. The bristle 16a forming the protruding hair bundle 15a includes a tapered portion having a lower taper degree than the tapered bristle 16b, 16c of the tapered hair bundle 15b, 15c, so that the bristle 16a forming the protruding hair bundle 15a has teeth. It becomes easier to reach deeper between the gaps, and it becomes possible to efficiently extrude food residue and dirt clogged between the teeth.

  In this embodiment, as shown in FIGS. 1A and 1B, for example, polybutylene terephthalate is provided in the three distal end outer flocking holes 14 b formed on the distal end side of the distal flocking region 17 a. The taper hair bundles 15b formed by bundling 56 taper bristle 16b having a hair diameter of 0.178 mm are implanted so as to have a hair length of 11.5 mm, for example. In the three tip end inner flocking holes 14c formed by being arranged on the intermediate flocking region 17b side of the tip flocking region 17a, 56 hairs made of, for example, polybutylene terephthalate and having a diameter of 0.178 mm are provided. The taper bristle 16c formed by bundling the taper bristle 16c is implanted so as to have a hair length of 10.5 mm, for example.

  Accordingly, the tapered bristle 16b, 16c forming the tapered hair bundle 15b, 15c planted in the tip side hair transplantation region 17a is planted with a hair length lower by 0 to 2 mm than the bristle 16a forming the protruding hair bundle 15a. Will be. Further, the virtual tip side brush surface 18a formed by connecting the tips of the taper bristle 16b, 16c forming the taper hair bundles 15b, 15c is longer than the end edge part on the side of the intermediate part hair transplant region 17b. The tip end side in the direction X has a height difference portion 18b that is high.

  In the present embodiment, the three rear end outer flocking holes 14b ′ formed by being arranged on the rear end side of the rear end side flocking region 17c have a bristle diameter of 0.178 mm made of, for example, polybutylene terephthalate. Tapered bristle bundles 15b formed by bundling 56 taper bristle bristles 16b are each implanted so as to have a hair length of preferably 11.5 mm. The three rear end inner flocking holes 14c ′ formed by being arranged on the intermediate flocking region 17b side of the rear end flocking region 17c have a diameter of 0.178 mm, for example, made of polybutylene terephthalate. The taper bristle bundles 15c formed by bundling the 56 taper bristle 16c are implanted so as to have a hair length of, for example, 10.5 mm.

  Accordingly, the tapered bristle 16b, 16c forming the tapered hair bundle 15b, 15c planted in the rear end side hair transplanting region 17c is planted with a hair length 0-2 mm lower than the bristle 16a forming the protruding hair bundle 15a. Will be. Further, the virtual rear end brush surface 18a ′ formed by connecting the tips of the tapered bristle 16b, 16c forming the tapered hair bundle 15b, 15c is more than the end edge portion on the intermediate portion flocking region 17b side. The longitudinal direction X of the rear end side is higher, and has a height difference portion 18b ′.

  In the present embodiment, 44 bristle 16d made of, for example, nylon and having a diameter of 0.203 mm is provided in nine intermediate flocking holes 14d formed in a distributed manner in the intermediate flocking region 17b. The intermediate auxiliary hair bundles 15d formed by bundling are each implanted so as to have a hair length of, for example, 9.5 mm. As a result, the intermediate auxiliary hair bundle 15d implanted in the intermediate flocking hole 14d of the intermediate flocking region 17b together with the protruding hair bundle 15a becomes a hair bundle having a hair length lower than that of the protruding hair bundle 15a. The bristle 16d that forms the auxiliary hair bundle 15d is implanted with a hair length that is 2 mm or more lower than the bristle 16a that forms the protruding hair bundle 15a. The bristle 16d forming the intermediate auxiliary hair bundle 15d is preferably a spherical bristle having a spherical portion at the tip.

  The bristle 16d that forms the intermediate auxiliary hair bundle 15d having a lower hair length than the protruding hair bundle 15a is implanted with a hair length that is 2 mm or more lower than the bristle 16a that forms the protruding hair bundle 15a, and is spherical at the tip. The spherical bristle provided with the portion makes it possible to easily reach the bristle 16a forming the protruding hair bundle 15a deeper into the interproximal portion, and the bristle 16d forming the intermediate auxiliary hair bundle 15d is provided. The spherical portion at the tip can efficiently scrape the plaque on the smooth portion of the teeth.

  Further, the bristle 16d forming the intermediate auxiliary hair bundle 15d having a lower hair length than the protruding hair bundle 15a can be planted with a hair length lower by 0 to 2 mm than the bristle 16a forming the protruding hair bundle 15a. In this case, it is preferable that the bristle 16d forming the intermediate auxiliary hair bundle 15d is a tapered bristle having a tapered portion with a cross-sectional area decreasing toward the tip. Thereby, the bristle 16a forming the protruding hair bundle 15a can reach the interdental portion more deeply without being obstructed by the bristle 16d forming the intermediate auxiliary hair bundle 15d.

  According to the toothbrush 10 of the present embodiment having the above-described configuration, the protruding hair bundles 15a having high bristles are distributed and planted in the intermediate hair transplantation region 17b. Tapered hair bundles 15b and 15c are implanted in the hair transplant region 17c, and the taper bristle 16b and 16c forming the taper hair bundle 15b and 15c of the tip side hair transplant region 17a are more than the bristle 16a forming the protruding hair bundle 15a. In addition, the imaginary tip-side brush surface 18a formed by connecting the tips is planted with a hair length lower by 0 to 2 mm, and the longitudinal direction X of the flocking table 11 is more than the end edge portion on the intermediate hair transplantation region 17b side. It has an elevation difference portion 18b that increases toward the tip side. Also preferably, the taper bristle 16b, 16c forming the taper hair bundle 15b, 15c of the rear end side hair transplantation region 17c is also planted with a hair length 0-2 mm lower than the bristle forming the protruding hair bundle 15a. At the same time, the virtual rear end side brush surface 18a ′ formed by connecting the front ends has a height difference part 18b in which the longitudinal direction X rear end side of the flocking table 11 is higher than the end edge part on the intermediate part flocking region 17b side. 'have.

  As a result, according to the toothbrush 10 of the present embodiment, as shown by the dotted line in FIG. 1A, the brush surface, which is the base excluding the protruding hair bundle 15a, becomes a curved surface of the tooth row arranged in a curved shape. Since the concave shape that is easy to fit is provided, the tips of the tapered bristle 16b and 16c of the tapered hair bundles 15b and 15c of the leading-end side flocking region 17a and the trailing-end side flocking region 17c across the intermediate flocking region 17b It becomes possible to make it easy to support by contacting the surface. As a result, the protruding bristle bundle 15a of the intermediate hair transplantation region 17b is inserted into the interdental portion while the tips of the taper bristle 16b and 16c are in contact with and supported by the tooth surface, thereby effectively and stably. The interdental portion can be wiped out, and the tips of the tapered bristle 16b, 16c can be brought into contact with the tooth surface so that the taper-shaped portion can be supported while maintaining appropriate elasticity. The protruding hair bundle 15a can be inserted in a stable state up to a deeper position in the space, and can be cleaned.

  Therefore, according to the toothbrush 10 of the present embodiment, the protruding bristle bundle 15a, which is a tuft having a high bristle length, improves the stability when entering the interproximal part, and further improves the plaque removal effect of the interdental part. It becomes possible to further increase.

  FIG. 3 shows a main part of a toothbrush 20 according to another preferred embodiment of the present invention. The toothbrush 20 of another embodiment shown in FIG. 3 has substantially the same configuration as the toothbrush 10 of the above-described embodiment, and is arranged at three rear positions formed on the rear end side of the rear end side flocked region 17c. The hair length of the taper hair bundle 25b planted in the end outer hair transplant hole 14b 'is different from the hair length of the taper hair bundle 15b of the above embodiment. In addition, regarding the toothbrush 20 illustrated in FIG. 3, components different from the toothbrush 10 of the above embodiment are mainly described, and the same components are denoted by the same reference numerals and description thereof is omitted. The description regarding the toothbrush 10 of the above-described embodiment is appropriately applied to components that are not particularly mentioned.

  In the toothbrush 20 of other embodiment shown in FIG. 3, the taper hair | bristle bundle 25b planted by three rear end part outer side flocking holes 14b 'arrange | positioned at the rear end side of the rear end side flocking area | region 17c is back. The hair length of 10.5 mm is the same as the tapered hair bundle 15c planted in the three rear end inner flocking holes 14c ′ arranged on the intermediate flocking region 17b side of the end flocking region 17c. It has been planted. As a result, the tapered bristle 16b, 26b forming the tapered hair bundle 15b, 25b planted in the rear end side hair transplantation region 17c has a virtual rear end side brush surface 28a formed by connecting the tips, the height difference portion. It is a surface that does not have.

  According to the toothbrush 20 of another embodiment shown in FIG. 3, as shown by the dotted line in FIG. 3, the brush surface serving as a base excluding the protruding hair bundle 15 a is flat at the portion on the rear end side flocked region 17 c side. However, since the tip side flocked region 17a side has a concave shape that easily fits the curved surface of the dentition arranged in a curved line, at least the tapered hair bundle 15b of the tip side flocked region 17a, It becomes possible to make the tips of the taper bristle 16b, 16c of 15c come into contact with the tooth surface and be easily supported. As a result, similar to the toothbrush 10 of the above-described embodiment, the protruding bristle bundle 15a of the intermediate flocking region 17b is inserted between the teeth while the tips of the tapered bristle 16b and 16c are in contact with and supported by the tooth surface. Thus, the same effect as the toothbrush 10 of the above embodiment is exhibited.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the height difference part of the tip side brush surface and the back end side brush surface is a taper hair bundle planted in the tip end outer flocking hole or the rear end outer flocking hole, the tip inner flocking hole or the rear end inner side. It is not always necessary to plant with a hair height higher than the taper hair bundle planted in the planting hole, and it is not necessarily provided by these stepped portions, preferably from the edge of the intermediate planting region side to the longitudinal direction of the planting table You may form by the inclined surface part which becomes high gradually toward the front end side or the longitudinal direction rear end side. This makes it easier to fit the curved surface of the dentition arranged in a curved line, and it is possible to further improve the stability when the protruding hair bundle enters the interdental portion.

  Moreover, the taper hair | bristle bundle planted in a rear-end part outer side flocking hole may be planted by lower hair length than the taper hair | bristle bundle planted in a rear-end part inner side flocking hole. The tapered bristle that forms the tapered hair bundle planted in the rear end side hair transplantation region may be planted with a hair length that is 2 mm or more lower than the bristle that forms the protruding hair bundle. The bristle that forms the protruding hair bundle does not necessarily need to be a tapered bristle having a tapered portion with a reduced cross-sectional area toward the tip, and does not necessarily have a helically twisted shape. . A bristle that forms a hair bundle other than the protruding hair bundle can also be formed to have a helically twisted shape. Each hair bundle can also be planted in a state where it is tilted forward or rearward in the longitudinal direction of the flocking table, for example.

10, 20 toothbrush 11 flocking table 11a flocking surface 12 neck 13 toothbrush main body 14a intermediate small diameter flocking hole 14b tip outer flocking hole 14b 'rear end outer flocking hole 14c front end inner flocking hole 14c' rear end inner flocking hole 14d Intermediate part flocking hole 15a Protruding hair bundle 15b, 15c, 25b Taper hair bundle 15d Intermediate part auxiliary hair bundle 16a Bristle (spiral hair)
16b, 16c, 26b Tapered bristle 16d Bristle (spherical bristle)
17a Front end side flocking region 17b Intermediate portion flocking region 17c Rear end side flocking region 18a Virtual front end side brush surface 18a ', 28a Virtual rear end side brush surfaces 18b, 18b' Height difference portion X Longitudinal direction Y of flocking table Y flocking table Width direction

Claims (9)

A hair bundle formed by bundling a plurality of bristles is a toothbrush that is implanted in each of a plurality of flock holes formed on a flocking table,
The flocking table includes a front end side flocking region on the front end side in the longitudinal direction, a rear end side flocking region on the rear end side in the longitudinal direction, and an intermediate flocking region between the front end side flocking region and the rear end side flocking region. And
In the intermediate hair transplantation region, a plurality of protruding hair bundles having a high bristle height are distributed and planted,
In the front end side flocked region and the rear end side flocked region, a taper hair bundle formed by bundling a plurality of taper bristles having a tapered portion with a reduced cross-sectional area toward the front end is implanted.
The tapered bristle that forms the tapered hair bundle planted in the tip side hair transplantation region is planted with a hair length that is 0 to 2 mm lower than the bristle that forms the protruding hair bundle, and is formed by connecting the tips. The virtual tip-side brush surface is provided with a height difference portion in which the tip end side in the longitudinal direction of the flocking table is higher than the edge portion on the intermediate portion flocking region side,
A toothbrush in which a hair bundle having a lower hair length than the protruding hair bundle is implanted in the intermediate hair transplantation area together with the protruding hair bundle.   The toothbrush according to claim 1, wherein the height difference part is formed by an inclined surface part that is higher from an end edge part on the intermediate part flocking region side toward a longitudinal direction front end side of the flocking table.   The toothbrush according to claim 1 or 2, wherein a taper bristle that forms the tapered hair bundle planted in the tip side hair transplantation region has a higher degree of taper than a bristle that forms the protruding hair bundle.   The flocking hole in which the protruding hair bundle is planted is in a state where a center space of 2.5 to 5 mm is provided between the flocking hole in which the protruding hair bundle adjacent to the longitudinal direction of the flocking table is planted, The toothbrush according to any one of claims 1 to 3, wherein the toothbrush is formed in a distributed manner in the intermediate hair transplantation region.   The toothbrush according to any one of claims 1 to 4, wherein the bristle forming the protruding bristle bundle has a helically twisted shape.   The tapered bristle that forms the tapered hair bundle planted in the rear end side hair transplantation region is planted with a hair length that is 0 to 2 mm lower than the bristle that forms the protruding hair bundle, and the tips are connected to each other. The virtual rear end side brush surface to be formed has a height difference portion in which the rear end side in the longitudinal direction of the flocking table is higher than the end edge portion on the intermediate portion flocking region side. The toothbrush of any one of these.   The tapered bristle that forms the tapered hair bundle planted in the rear end side hair transplantation region is planted with a hair length that is 2 mm or more lower than the bristle that forms the protruding hair bundle. The toothbrush according to claim 1.   The bristle formed with the protruding hair bundle in the intermediate hair transplantation area and forming a hair bundle having a lower hair length than the protruding hair bundle has a hair length lower by 0 to 2 mm than the bristle forming the protruding hair bundle. The toothbrush according to any one of claims 1 to 7, wherein the toothbrush is a tapered bristle provided with a tapered portion having a reduced cross-sectional area toward the tip.   The bristle formed in the intermediate hair transplantation area together with the protruding hair bundle and forming a hair bundle having a lower hair length than the protruding hair bundle has a hair length that is 2 mm or more lower than the bristle forming the protruding hair bundle. The toothbrush according to any one of claims 1 to 7, wherein the toothbrush is a spherical bristle that is implanted and has a spherical portion at a tip.

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