JP2000004945A - toothbrush - Google Patents

Abstract

(57) [Problem] To provide a toothbrush excellent both in holding power of a dentifrice and in brushing property of a tooth, in particular, polishing property. SOLUTION: In a toothbrush in which a plurality of bristle bundles 4 each having a bundle of brushes are planted on a flocked surface 2 of a head portion 1, a degree of dense bristle is 64%
Using the above hair bundles 4, a plurality of hair bundles 4 having a dense hair density of 64% or more are arranged around the center point O, and a group of block patterns around the center point O is formed by the plurality of hair bundle groups. To form All or a part of each bristle bundle 4 is formed to have a line-symmetric or non-symmetrical cross-sectional shape with respect to the axis l passing through the center point O, depending on the purpose of use. When brushing teeth, the dentifrice is more likely to be held in the bristle bundles that form a block pattern, and because the density of flocking per unit area is high, brushing, especially polishing, of the teeth is efficient and effective. Can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothbrush which is excellent in both the holding power of a dentifrice and the brushing property of a tooth, especially the polishing property.

[0002]

2. Description of the Related Art Usually, a toothbrush has a diameter of 1.5 to 2.0.
The hair transplant holes with a circular cross section of about mm are regularly arranged on the flocking surface of the head part like a grid, and a bundle of a plurality of brushes (filaments) is bundled in these flocking holes and folded in two by a flat line. The hair was implanted by driving. For this reason, the density of the planted hair bundle is usually about 55 to 60%. The density of the bristle bundle referred to here indicates the ratio of the cross-sectional area of the flocking hole to the sum of the cross-sectional areas of the brushes constituting the bristle bundle.

[0003] In the above-mentioned conventional brush, in order to prevent the occurrence of cracks or breakage due to the impact at the time of striking a flat wire, the spacing between the flocking holes cannot be narrowed and the flocking density of the whole flocking surface cannot be increased so much. Regarding the degree of dense hair, a loss of the integral of the cross section of the flat line always occurs. For these reasons, there is a limit in increasing the degree of dense hair, and the holding power of the dentifrice during brushing cannot be sufficiently increased.

In order to effectively remove plaque adhering or accumulating on all parts of the tooth surface, interdental space, and cervical region,
While forming at least one or more bristle bundles in a brush longitudinal direction wide among a plurality of bristle bundles constituting a flocking portion,
A toothbrush having a roof-like shape in which the tip of the bristle bundle converges toward a point-like, linear or planar top (Japanese Patent Laid-Open No. 9-14)
No. 9815) has been proposed, but it has not been sufficient to simultaneously satisfy both the holding power of the dentifrice and the brushability of the teeth.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a toothbrush which is excellent in both the holding power of a dentifrice and the brush-cleaning property of a tooth, particularly, a polishing property. The purpose is to provide.

[0006]

To achieve the above object, a toothbrush according to the present invention uses a bristle bundle having a density of at least 64% and places the bristle bundle having a density of at least 64% around a center point. A plurality of hair bundle groups are arranged, and a group of block patterns are formed around the center point by the plurality of hair bundle groups.

The hair bundles arranged around the center point may include a plurality of hair bundles having the same sectional shape,
Also, a plurality of objects that are equidistant from the center point may be included. Further, a plurality of sections having the same cross-sectional shape and equidistant from the center point may be included.

The bristle bundle arranged around the center point partially has a bristle bundle having a cross-sectional shape that is symmetrical with respect to an axis passing through the center point, or all bristle bundles. May be hair bundles having a cross-sectional shape that is symmetrical with respect to an axis passing through the center point.

Further, the bristle bundle arranged around the center point partially has a bristle bundle having a cross-sectional shape which is not line-symmetric with respect to an axis passing through the center point, or all the bristle bundles have the center point. May be a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through.

[0010]

[Function] Since a plurality of hair bundles having a dense hair density of 64% or more are arranged around the center point, and a group of these hair bundles forms a block pattern around the center point.
Since the dentifrice is more likely to be held in the bristle bundle during brushing, and the flock density per unit area is high, brushing, especially polishing, of the teeth can be performed efficiently and effectively.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of a toothbrush according to the present invention. FIG. 1 is a plan view of a head portion, and FIG. 2 is an enlarged cross-sectional view taken along the line AA in FIG. 1, where 1 is a toothbrush head portion, 2 is a flocked surface,
Reference numeral 3 denotes a burial hole, and reference numeral 4 denotes a hair bundle.

In the first embodiment, each of the hair bundles 4 is a petal-shaped hair bundle whose density is 64% or more and whose cross-sectional shape is line-symmetric with respect to the axis l passing through the center point O. 4, the petal-shaped hair bundles 4 are arranged so as to form a set of six flower bundles around the center point O as if they were a unit. In the illustrated example, two sets of flower-like block patterns each constituted by a set of six hair bundles are arranged in the longitudinal direction of the brush.

In the case of a toothbrush having such a block pattern, each of the bristle bundles 4 forming the block pattern
Is as high as 64% or more, the holding power of the dentifrice is extremely high, and the cross-sectional shape of each bristle bundle 4 is symmetrical with respect to the axis l passing through the center point O. The symmetry of the hair is high, and the contact of the bristle tips with the tooth surface is improved, and at the same time, unevenness of brushing and polishing is reduced,
It is possible to brush teeth effectively. For this reason, it is possible to simultaneously satisfy both the holding power of the dentifrice and the brushing property of the tooth, particularly the polishing property.

In the case of the present invention, the density of each hair bundle 4 is 64%.
Since it is necessary to make the above, it is not possible to adopt the above-described conventional flocking method using a flat wire. For this reason, in manufacturing the toothbrush of the present invention, a flocking method using no flat wire, for example, an in-mold method (Japanese Patent Publication No. 6-16725,
JP-A-61-268208, JP-A-2-111305
For example, and a thermal fusion method (see Japanese Patent Publication No. 6-49662 and Japanese Patent Application Laid-Open No. 2-99002). For example, after bundling the brushes into a predetermined density, bristle shape, and bristle tip shape, the bristle bundle end opposite to the bristle tip is melted and fixed by means of heat or the like, and this is in-molded. For example, a method of implanting hairs in the head portion 1 by a thermal fusion method or the like is used.

As described above, the density of the hair bundle in the case of the hair transplanting method without using a flat wire is determined by melting the base end of the hair bundle by a thermal means and integrating it with a mold, a sleeve, or the like. The cross-sectional area or the cross-sectional area of a mold or a sleeve used when the base end of the hair bundle is directly heat-sealed to the head portion by a method such as heat fusion or in-mold, and each brush constituting the hair bundle. And the total cross-sectional area.

Although the density of the bristle bundle 4 may be 64% or more, the process of adjusting the shape of the bristle bundle and the tip of the bristle in the production line, and finally the process of extracting the toothbrush from the mold and taking it out. In consideration of such factors, it is desirable that the denseness of the hair bundle 4 be 85% at the maximum, and more preferably 80%. When the degree of dense hair of the hair bundle 4 is in the range of 64 to 85%, the balance between manufacturing efficiency and quality performance can be further improved. To increase the density of the hair bundle 4, the hair bundle 4
Can be realized not only by increasing the number of brushes constituting the above, but also by making the cross-sectional shape of each brush into a cross-sectional shape other than a circle such as a square, a triangle, or a hexagon.

Further, if the number of brushes constituting the bristle bundle 4 is increased and packed to the limit, the degree of dense hair can be increased to 100% or more. However, although the probability of contact of the bristle tip with the tooth surface increases as the degree of denser hair increases, the gap between the brushes constituting the bristle bundle 4 decreases when the degree of denser hair becomes too high. Hair bundle 4
The bristles open in a broom-like shape toward the tip, so that the brushing performance cannot be sufficiently improved, and the appearance is also undesirable. As a result of various experiments by the present inventors, the density of the hair bundle 4 was optimally in the range of 64 to 85% as described above.

The overall shape of the surface 5 formed by the tips of the hair tips of each hair bundle 4 is not limited to the concave shape shown in FIG. 2 but is additionally shown in FIGS. 3 (a) to 3 (i). An arbitrary surface shape as shown in FIG. Note that FIG.
(A) to (i) show only the hair bundle shape on the upper side of the head portion, and the illustration of the portion embedded in the head portion is omitted.

If the entire shape of the surface 5 is flat as shown in FIG. 3 (a), more bristle tips can be brought into contact with the flat tooth surface, and the toothpaste can be uniformly applied to the tooth surface. Can work. FIG. 2 or FIG.
(B), (f), (g), (h), and (i), when formed so as to have a substantially concave shape as a whole, the holding effect of the dentifrice is improved and the complicated curved surface of the tooth is improved. And the brushing property, particularly the polishing property, is improved.

If the entirety is formed in a substantially convex shape as shown in FIGS. 3 (c) and 3 (d) or a surface which is entirely inclined in one direction as shown in FIG. The bristle tip can efficiently reach the depressed portion where plaque tends to accumulate, such as the portion, and the brushing effect can be further enhanced. It is preferable to appropriately select and combine the shapes of the surfaces formed by the tips of the bristle tips according to the intended use of the toothbrush.

The brush length of each bristle bundle 4 constituting the block pattern is set to a maximum height H = 6 to 12 mm as shown in FIG. 2 in consideration of the flexibility of the bristle bundle and the usability in the oral cavity.
(H = 6-11mm for children, H for adults)
(8 to 12 mm). Also,
When the shape of the surface 5 formed by the tip of the bristle tip of each bristle bundle 4 is a shape other than a plane, the step d between the top and the lowest of the brush is set to 3 mm or less, and more preferably d from the viewpoint of usability. = 2m
m is desirable.

The number of hair bundles 4 arranged around the center point O to form one block pattern is not particularly limited, and may be two or more.
Number, preferably about 4 to 8 pieces.

Also, if the area of the block connecting the outermost circumference of the hair bundle group forming one block pattern with an imaginary line is too small, a sufficient effect of holding the dentifrice cannot be obtained. The operability of the toothbrush inside will be worse. Therefore, it is desirable that the area of the surface surrounded by the envelope be just large enough to fit one tooth from the viewpoint of brushability and operability. Expressing this as an area,
It is about 10 to 100 mm ^2, and if this area is represented by a perfect circle, it becomes a circle having a diameter of about 3.5 to 11.3 mm.

The materials of the brushes constituting each bristle bundle 4 include:
A commonly used polyamide (for example, nylon 6-
12, nylon 6-10, 12 nylon, etc.), polyester (for example, polybutylene terephthalate, polyethylene terephthalate, etc.), polypropylene and the like can be used. Of course, a composite filament combining these may be used.

The cross-sectional shape of each brush is mainly a circular cross-section, but is not particularly limited. For example, if a brush having a polygonal cross section such as a quadrangle or a hexagon is used, it is possible to increase the flocking density more than usual, and if a brush having a bulky cross-sectional shape such as a star is used, the brush tip The porosity in the portion is increased, and the holding power of the dentifrice can be further increased.

The thickness of the brush constituting the bristle bundle 4 is 3 to 10
mil (0.076 to 0.254 mm), preferably 5
It is preferably about 8 mil (0.127 to 0.203 mm). Further, usually, a brush having the same diameter is used from the base end to the distal end except for the rounded portion of the bristle tip, but the brush is not limited to this. Even if there is, it is good also as a taper hair which diameter becomes small gradually toward a hair end.

The bristle bundles 4 in the same block need not all have the same brush diameter, even if they have the same bristle cross-sectional shape, for example, 6 mil (0.152 mm) and 7 m
For example, il (0.178 mm), the brush diameter can be appropriately selected for each bristle bundle in consideration of usability, brushing feeling, cleaning effect, and the like. Further, the number of blocks formed on the flocking surface 2 may be one set, or two sets or more as shown.

In consideration of usability, brushing feeling, cleaning effect, etc., the overall shape of the block and the shape, arrangement pattern, brush diameter, etc. of each of the bundles constituting the block may be different for each block. Further, as shown in FIG. 4, not only the bristle bundles 4 constituting a block pattern but also other independent bristle bundles 6 which do not form a block pattern.
May be combined.

The material of the toothbrush handle including the head portion 1 may be a thermoplastic resin, for example, polypropylene, polyethylene, polyester, polyamide, cellulose propionate, polymethyl methacrylate, ABS or the like. can do. It is also preferable to use a multicolor forming handle in which these resins are combined with each other or with a thermoplastic elastomer. If the brush and handle constituting the bristle bundle 4 are made of the same material, it is advantageous in terms of disposal after use and recycling, and if a resin material having good biodegradability is used, good disposal can be achieved. be able to.

The bristle bundles 4 arranged around the center point O are not necessarily all the same in shape and are not necessarily equidistant from the center point O. As will be apparent from other shape examples described later, Any combination of shapes and distances may be used. It is preferable that the number of hair bundles having the same cross-sectional shape is large from the viewpoint of hair management used for mold production and production. When 50 to 100% of the hair bundle groups constituting one block pattern have the same cross-sectional shape, the brush is cleaned. This is more preferable because unevenness of polishing and polishing are reduced and uniformity is improved.

The greater the number of bristle bundles equidistant from the center point O, the higher the symmetry, so that unevenness in brushing and polishing is reduced and uniformity is improved. In particular, if 50% to 100% of the hair bundle groups constituting one block pattern are arranged at the same distance from the center point O, the group of the hair bundle groups becomes higher, so that unevenness in brushing and polishing is further reduced, The uniformity is further improved, and the aesthetic appearance of the toothbrush is more preferable.

If the cross-sectional shape of the individual hair bundles 4 is line-symmetric with respect to the axis passing through the center point O, the symmetry of the entire block is improved, the unevenness of brushing and brushing is reduced, and the uniformity is improved. Become. It is not necessary that all the hair bundles have a line-symmetrical cross-sectional shape, but 50 to 100% of the hair bundles in each block pattern formed on the flocked surface 2 have a line-symmetrical cross-sectional shape. It is more effective.

As a method of shaping the shape of the tip end surface 5 of the hair bundle 4 into a desired surface shape as shown in FIG. 2 or FIGS. Then, the hair may be cut using a cutter so that the entire hair bundle group has a predetermined surface shape. Further, after the brushes constituting each bristle bundle are arranged to have an arbitrary constant length, the brushes in the bristle bundle are moved up and down with respect to each other so that the tip end of each bristle bundle has a desired shape. Then, the opposite ends of the bristle bundle are trimmed, and the trimmed ends of the bristle bundle are melted by thermal means to form an enlarged portion, and the enlarged portion is implanted by the in-mold method or the heat fusion method described above. It can also be manufactured by planting hair on a surface.

FIGS. 5 to 23 show other examples of the block pattern using the hair bundle 4 whose sectional shape is line-symmetric with respect to the axis passing through the center point O. As described above, it is desirable that one block pattern has a visually coherent hair bundle configuration and is arranged so that the respective hair bundles maintain an appropriate interval. When the distance between the bristle bundles is maintained at least about 0.5 mm, the flexibility of each bristle bundle is maintained and the dentifrice is easily held, which is more effective. Note that all of the hair bundles arranged around the center point O may be line-symmetrical hair bundles, or only some of them may be line-symmetrical hair bundles.

FIG. 24 shows a second embodiment of the toothbrush according to the present invention. In this second embodiment, each hair bundle 4
A crescent-shaped hair bundle 4 having a dense hair density of 64% or more and whose cross-sectional shape is not line-symmetric with respect to the axis l passing through the center point O is used. As a set, they are arranged around the center point O so as to form a blade-like block pattern of a fan. In the illustrated example, two sets of fan-like block patterns of a fan composed of a set of four hair bundles are arranged in the longitudinal direction of the brush.

As in the second embodiment, the cross-sectional shape of each of the bristle bundles 4 constituting the block pattern is not axisymmetric with respect to the axis l passing through the center point O. When arranged in a block pattern, a rotational pushing force or a swirling force is generated along the blades in the entire block at the time of tooth brushing, and the brushing force is improved. In this case as well, it is not necessary to make all the hair bundles non-linearly symmetrical. However, if 50 to 100% of the plurality of block patterns formed on the flocked surface 2 are non-linearly symmetrical hair bundles, , Is more effective.

FIGS. 25 to 60 show other examples of block patterns using the hair bundle 4 whose cross-sectional shape is not line-symmetric with respect to the axis passing through the center point O. FIG. Also in these cases, it is needless to say that the hair bundles should be arranged so as to keep an appropriate interval between them. Note that all of the hair bundles arranged around the center point O may be hair bundles that are not axisymmetric, or only some of them may be hair bundles that are not axisymmetric.

Although various embodiments of the present invention have been described above, each bristle bundle 4 forming a block pattern is actually an aggregate of a plurality of brushes. In some cases, the hair bundle does not have a cross-sectional shape, but this is also acceptable in the present invention. Also, due to the processing of a mold for shaping the cross-sectional shape of the bristle bundle 4, the bristle bundle may not form a clear corner especially at the corner of the cross-sectional shape, and R (R) may be formed. However, this is also acceptable.

The present invention is not limited to the above embodiments, and various modifications and applications can be made in accordance with the gist of the invention.

[0040]

According to the toothbrush of the present invention described above, the following excellent effects can be obtained. (1) Using a hair bundle having a dense hair density of 64% or more, the dense hair density of 64%
A plurality of the above bristle bundles are arranged around the central point, and a group of block patterns are formed around the central point by the plurality of bristle bundles. It is easy to hold, and the flock density per unit area is high, so brushing teeth is efficient, and
It can be done effectively. For this reason, it is possible to simultaneously satisfy both the holding power of the dentifrice and the brushing property of the tooth, particularly the polishing property.

(2) By making the cross-sectional shape of a plurality of hair bundles arranged around the center point symmetrical with respect to the axis passing through the center point, the symmetry of the entire block is improved, and The unevenness of the cleaning and polishing is reduced, and the uniformity is improved.

(3) Conversely, if the cross-sectional shape of a plurality of bristle bundles arranged around the center point is not axisymmetric with respect to the axis passing through the center point, the entire block is pushed out in the rotational direction during brushing. A force or scraping force is generated, and the cleaning force is improved. For this reason, it is possible to block dirt on the tooth surface as if it were a blade of a fan without having to be conscious of it, just by performing back and forth movement such as bath method and scrub method, and left and right movement such as roll method. A force acts in the direction of the center of the pattern or pushes it outward,
Tooth cleaning, particularly polishing, can be performed efficiently and effectively.

[Brief description of the drawings]

FIG. 1 is a plan view of a head portion showing a first embodiment of a toothbrush according to the present invention.

FIG. 2 is an enlarged sectional view taken along the line AA in FIG.

FIGS. 3A to 3I are diagrams showing another example of the surface shape of the tip of the hair tip.

FIG. 4 is a diagram showing a modification of the first embodiment.

FIG. 5 is a diagram showing a first other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 6 is a diagram showing a second other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 7 is a diagram showing a third other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 8 is a diagram illustrating a fourth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 9 is a diagram illustrating a fifth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 10 is a diagram showing a sixth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 11 is a diagram showing a seventh other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 12 is a diagram showing an eighth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 13 is a diagram showing a ninth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 14 is a diagram showing a tenth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 15 is a diagram showing an eleventh other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 16 is a diagram showing a twelfth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 17 is a diagram showing a thirteenth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 18 is a diagram showing a fourteenth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 19 is a diagram showing a fifteenth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 20 is a diagram showing a 16th other example of the block pattern using the hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through the center point.

FIG. 21 is a diagram showing a seventeenth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 22 is a diagram illustrating an eighteenth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 23 is a diagram showing a nineteenth other example of a block pattern using a hair bundle having a cross-sectional shape symmetrical with respect to an axis passing through a center point.

FIG. 24 is a plan view of a head portion showing a second embodiment of the toothbrush according to the present invention.

FIG. 25 is a diagram illustrating a first other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 26 is a diagram illustrating a second other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 27 is a diagram illustrating a third other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 28 is a diagram illustrating a fourth other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 29 is a diagram illustrating a fifth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 30 is a diagram illustrating a sixth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 31 is a diagram showing a seventh other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 32 is a diagram illustrating an eighth other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 33 is a diagram illustrating a ninth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 34 is a diagram illustrating a tenth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 35 is a diagram showing an eleventh other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 36 is a diagram showing a twelfth other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 37 is a diagram illustrating a thirteenth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 38 is a diagram illustrating a fourteenth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 39 is a diagram illustrating a fifteenth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 40 is a diagram illustrating a sixteenth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 41 is a diagram illustrating a seventeenth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 42 is a diagram showing an eighteenth other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 43 is a diagram showing a nineteenth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 44 is a diagram illustrating a twentieth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 45 is a diagram illustrating a 21st other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 46 is a diagram illustrating a 22nd other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 47 is a diagram illustrating a 23rd other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 48 is a diagram showing a twenty-fourth other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 49 is a diagram illustrating a 25th other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 50 is a diagram showing a 26th other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 51 is a diagram illustrating a 27th other example of the block pattern using the bristle bundle whose cross-sectional shape is not line-symmetric with respect to the axis passing through the center point.

FIG. 52 is a diagram illustrating a 28th other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 53 is a diagram illustrating a 29th other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 54 is a diagram showing a thirtieth other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through a center point.

FIG. 55 is a diagram illustrating a 31st other example of the 31st block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through the center point.

FIG. 56 is a diagram showing a 32nd other example of the block pattern using the bristle bundle whose cross-sectional shape is not line-symmetric with respect to the axis passing through the center point.

FIG. 57 is a diagram illustrating a 33rd other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 58 is a diagram illustrating a 34th other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 59 is a diagram illustrating a 35th other example of the block pattern using the hair bundle having a cross-sectional shape that is not line-symmetric with respect to the axis passing through the center point.

FIG. 60 is a diagram showing a thirty-sixth other example of a block pattern using a hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through the center point.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head part 2 Flocked surface 3 Buried hole 4 Hair bundle 5 Surface of hair bundle tip 6 Hair bundle O Center point l Axis passing through center point

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takao Kato 1-37 Honjo, Sumida-ku, Tokyo F-term in Lion Corporation (reference) 3B202 AA06 BA02 DB01 EA01 EF01 EF02 EF04 EF06 EF10 EG03 HA03

Claims (5)

[Claims] 1. A toothbrush in which a plurality of bristle bundles with brushes are planted on a flocked surface of a head portion, wherein a bristle bundle having a denseness of 64% or more is used as a center point. A toothbrush, wherein a plurality of bristle bundles are arranged around the center and a group of block patterns are formed around a center point. 2. The toothbrush according to claim 1, wherein a plurality of bristle bundles having the same cross-sectional shape are included in the bristle bundle arranged around the center point. 3. The toothbrush according to claim 1, wherein a plurality of bristle bundles equidistant from the center point are included in the bristle bundle arranged around the center point. 4. The hair bundle arranged around the center point has a hair bundle having a cross-sectional shape that is symmetrical with respect to an axis passing through the center point. 3
The toothbrush according to any one of the above. 5. The hair bundle arranged around the center point, the hair bundle having a cross-sectional shape that is not line-symmetric with respect to an axis passing through the center point. Crab toothbrush.