JP2000000118A - toothbrush - Google Patents

Abstract

(57) [Problem] To provide a toothbrush excellent in both holding power and brushability of a dentifrice. SOLUTION: In a toothbrush in which a plurality of bristle bundles obtained by bundling brushes are planted on a flocked surface 2 of a head part 1, a bristle bundle having a dense bristle degree of 64% or more is used. 4b
Are arranged around a certain center point O, and a group of block patterns are formed around the center point O by the plurality of hair bundle groups, and the tip end surface 6 of the hair bundle group forming the block pattern is formed. The tips of the bristle bundles 4a and 4b are shaped so that the surface shape formed by connecting them becomes substantially concave, substantially concave, inclined, or any combination thereof when viewed as the entire block pattern. Further, if necessary, the tip end surfaces 6 of the individual hair bundles 4a and 4b are also formed into an uneven surface shape with an uneven pattern or the like.

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.
A flocked hole having a circular cross section of about 0 mm was formed on the flocked surface of the head part.
It is arranged regularly like a grid at intervals of 5 to 1.2 mm, and a plurality of brushes (filaments) are inserted into these flocked holes.
The hair bundle obtained by bundling the hair bundle is folded in two along a flat line and driven in, and the density of the planted hair bundle is 55 to 60.
% Was normal. The density of the hair bundle referred to herein 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 hair 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 hair bundle density, loss of the integral of the cross section of the flat wire for driving the hair bundle always occurs. For these reasons, there is a limit in increasing the density of the bristle bundle, and the holding power of the dentifrice during brushing cannot be sufficiently increased.

[0004] Further, a toothbrush has a plurality of bristle bundles each of which is bundled with a brush, and the tip portion of each of these bristle bundles is usually generally flat. (Japanese Utility Model Laid-Open No. 1-997729, 6-195)
No. 62, Japanese Unexamined Patent Publication No. 9-149815) and those having a concave shape (Japanese Utility Model Laid-Open No. 6-50530) are known. However, in the case of such a conventional toothbrush, if the bristle bundle diameter is small, a sufficient holding effect of the dentifrice cannot be ensured.On the contrary, if the bristle bundle diameter is large, the pliability accompanying the bending of the bristle bundle disappears, It gives a very hard feel when used, resulting in a poor feeling of use.

[0005] The overall surface shape formed by the tip surfaces of a plurality of hair bundles is one that is entirely convex (Japanese Utility Model Laid-Open No. 3-9623) and one that is entirely concave (real opening). No. 63-191928) is known, but for a convex shape, only a conventional one made by flat-line type flocking is used, and no consideration is given to the point of dense hair. It has not been. In addition, for concave ones, hair bundles are arranged for the purpose of surrounding the teeth, and simply by arranging hair bundles with different brush lengths at the center and periphery, the surface shape composed of the whole hair bundle is completely No consideration has been given. For this reason, it was impossible to satisfy both the holding power of the dentifrice and the brushability of the teeth at the same time in any shape.

[0006]

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.

[0007]

In order to achieve the above object, a toothbrush according to claim 1 of the present invention has a dense hair density of 64%.
Using the above hair bundles, a plurality of hair bundles having the dense hair density of 64% or more are arranged around a certain center point, and a group of these hair bundle groups forms a block pattern around the center point. In addition, the tip of each hair bundle is shaped so that the surface shape formed by connecting the tip end surfaces of the hair bundle group forming the block pattern is substantially concave when viewed as a whole block pattern.

The toothbrush according to claim 2 of the present invention uses a bristle bundle with a denser hair density of 64% or more, and arranges a plurality of the bristle bundles with a denser hair density of 64% or more around a central point, When a group of block patterns are formed around the center point by the plurality of hair bundle groups, and the surface shape formed by connecting the end faces of the hair bundle groups forming the block pattern is viewed as the entire block pattern. The tip of each hair bundle is shaped so as to be substantially convex.

A toothbrush according to a third aspect of the present invention uses a bristle bundle with a denser hair density of 64% or more, and arranges a plurality of bristle bundles with a denser hair density of 64% or more around a central point. When a group of block patterns are formed around the center point by the plurality of hair bundle groups, and the surface shape formed by connecting the end faces of the hair bundle groups forming the block pattern is viewed as the entire block pattern. The tip of each hair bundle is shaped so as to form a slope.

A toothbrush according to a fourth aspect of the present invention uses a bristle bundle with a dense hair density of 64% or more, and arranges a plurality of the bristle bundles with a dense hair density of 64% or more around a central point. When a group of block patterns are formed around the center point by the plurality of hair bundle groups, and the surface shape formed by connecting the end faces of the hair bundle groups forming the block pattern is viewed as the entire block pattern. The tip of each hair bundle is shaped so as to have an arbitrary combination of convex, concave, and inclined surfaces.

Further, a toothbrush according to a fifth aspect of the present invention is the toothbrush according to any one of the first to fourth aspects, wherein a tip end surface of each of the shaped bristle bundles is formed into an uneven surface shape. It is a feature.

[0012]

A plurality of hair bundles having a degree of dense hair of 64% or more are arranged around a central point, and a group of block patterns are formed around the central point by the plurality of hair bundle groups. Each surface shape formed by connecting the tip end surfaces of the hair bundle group forming the pattern is substantially concave, substantially convex, substantially inclined, or an arbitrary combination thereof when viewed as a whole block pattern. Since the tip of the hair bundle is shaped, the dentifrice is easily retained in the hair bundle group when brushing the teeth, and the plaque and stain are easily accumulated, and the hair tips can easily reach various parts of the oral cavity that are difficult to drop.

Further, since the tip end face of each shaped bristle bundle is formed into an uneven surface shape, the toothpaste is held not only for the whole bristle group forming the block pattern but also for each bristle bundle. Thus, the holding power of the dentifrice can be further improved.

[0014]

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. 1 is a plan view of a head portion, and FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. In the drawing, 1 is a toothbrush head portion, 2 is a flocked surface, 3 is a burial hole, and 4a and 4b are The bristle bundles 5 and 5 are brushes (monofilaments) constituting the bristle bundles 4a and 4b, and 6 is the tip surface of the bristle bundles 4a and 4b.

In the first embodiment, one hair bundle 4a having a small circular cross section is formed by using a hair bundle having a dense hair density of 64% or more.
And four hair bundles 4b having a fan-shaped cross section.
a, 4b are implanted in a circle around the center point O,
A set of block patterns is formed around the center point O by the set of five hair bundles. In the illustrated example, a block pattern formed by the set of five hair bundles is defined as a block pattern. Two sets are arranged in the longitudinal direction of the brush.

Further, each of the five hair bundles 4a, 4b is formed such that each of the hair bundles 4a, 4b has a substantially concave shape as shown in FIG. 4
The tip surfaces 6 of a and 4b are shaped.

In the case of a toothbrush having such a bristle bundle configuration, each of the bristle bundles 4a and 4b has a high density of 64% or more,
Moreover, the hair bundles 4a and 4b are planted so as to form a block pattern around the center point O, and the distal end surfaces formed by connecting the distal end surfaces 6 of the hair bundles 4a and 4b. Because it is configured to have a substantially concave shape, the holding power of the dentifrice is increased and at the same time the contact with the tooth surface of the brush tip is improved, and unevenness of brushing and polishing is reduced, effectively You can brush your teeth. 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 denseness of the hair bundles 4a and 4b needs to be 64% or more, so that the above-described hair transplanting method using the flat wire cannot be adopted. Therefore, in producing 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-2-1113
No. 05) or a thermal fusion method (see Japanese Patent Publication No. 6-46962 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. It is manufactured by flocking by a heat fusion method or the like.

A plurality of hair bundles 4a,
4b, it is necessary to form one block pattern, and to form the surface shape formed by connecting the tip end surfaces 6 of these hair bundle groups into a concave shape as shown in FIG. 2, for example, as shown in FIG. It can be realized by such a method.

That is, the hair bundle 4 for shaping the tip into an inclined surface
The case of b will be described as an example. First, as shown in FIG. 3A, the hair bundle holding through-hole 42 of the hair bundle holding mold 41 is
After inserting the bristle bundle 4b composed of the required number of brushes 5, as shown in FIG. 3B, the whole bristle bundle 4b is moved by a bristle bundle holding pin 43 with a flat bristle moving pin 43 on the front end surface.
And push it almost to the center.

Next, as shown in FIG. 3 (c), the hair bundle contouring pins 44, 4 each having a tip end surface formed into a predetermined inclined surface.
4 is inserted from above and below the hair bundle holding through hole 42 and the hair bundle 4b
And outline the hair bundle 4b so that both end surfaces thereof have a predetermined inclined surface.

Then, as shown in FIG.
After moving the upper and lower hair bundle contouring pins 44 and 44 so that the brush length of b becomes the specified length, the lower excess hair bundle portion is cut by the hair bundle cutting cutter 45. The base end of the bristle bundle 4b thus obtained may be melted and fixed by means of heat or the like, and the bristle may be planted on the flocking surface of the toothbrush head by the above-described in-mold method or heat fusion method.

As described above, when the flat wire is not used, the density of the hair bundle is determined by cutting a mold or a sleeve used for melting and integrating the base end of the hair bundle by thermal means. The area, or the cross-sectional area of the mold or sleeve used when implanting the head portion of the hair bundle by a method such as heat fusion or in-mold, and the total cross-sectional area of each brush constituting the hair bundle It can be obtained by the ratio of

In the case of the present invention, it is sufficient that the density of the bristle bundle is 64% or more. However, the process of adjusting the bristle bundle shape and the bristle tip shape in the production line, and finally extracting the toothbrush from the mold. In consideration of the removal process, the density of the hair bundle is desirably 85% at the maximum, and more preferably 80%. When the density of the hair bundle 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 bristle bundle, not only increase the number of brushes constituting the bristle bundle, but also make the cross-sectional shape of each brush a cross-sectional shape other than a circle, such as a square, a triangle, or a hexagon. This can also be realized by:

If the number of the brushes constituting the bristle bundle is increased and packed to the limit, it is possible to increase the degree of dense hair to 100% or more. However, the higher the denseness, the higher the probability of contact of the bristle tip with the tooth surface, but if the denseness is too high, the gap between the brushes constituting the bristle bundle will decrease, and the holding power of the dentifrice will decrease. It causes a drop or a broom-like opening as the tip of the hair bundle approaches the tip,
Sufficient improvement in the brushing performance cannot be obtained, and the aesthetic appearance is also undesirable. As a result of various experiments by the present inventors,
The density of the hair bundle was optimally in the range of 64-85%, more preferably up to 80%, as described above.

Each hair bundle 4a, which forms a block pattern,
4b is formed by connecting the distal end surface 6 to the end surface 6 shown in FIG.
However, the present invention is not limited to the concave shape as shown in FIG. 4, and other arbitrary concave shapes as shown in FIGS. 4 (a) to (g) or FIGS. 5 (a) to (i) can be employed. Also,
Conversely to the concave shape, for example, it may be formed in an arbitrary convex shape as shown in FIGS. FIGS. 7A and 7B
8 may be formed in a slope shape as shown in FIG.
The surface shape may be a combination of any of the concave, convex, and inclined shapes shown in (a) to (i). These surface shapes are appropriately selected according to the design purpose of the toothbrush,
It is preferable to combine them. 4 to 8.
Each figure shows 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.

As described above, when the distal end surface 6 formed by connecting the distal end surfaces 6 of the bristle bundles 4a and 4b is formed to be substantially concave as a whole, the holding effect of the dentifrice is improved, and It is easy to fit the complicated curved surface of the tooth, and the brushability is improved. In addition, the long brush portion located on the outer peripheral side of the group of bristle bundles forming a block pattern by the pressure applied at the time of brushing becomes moderate, and efficiently reaches a plaque accumulation region such as a cervical region, and is printed. The sweeping effect can be enhanced.

Further, if the distal end surface formed by connecting the distal end surfaces 6 of the bristle bundles 4a and 4b is formed so as to be substantially convex as a whole, the group of bristle bundles having a high degree of dense bristle can apply the dentifrice. While holding, the plaque and stain easily accumulate, and the hair tips can easily reach a narrow part of the oral cavity that is difficult to drop, so that care concentrated on such a part can be easily performed.

Further, if the tip end surface 6 formed by connecting the tip end surfaces 6 of the bristle bundles 4a and 4b is formed so as to have a slanted shape as a whole, the brush length becomes the same as when the whole is made convex. The tip of the long part efficiently reaches the recessed part where plaque easily accumulates, such as the cervical part and the interdental part, and the brushing effect can be enhanced. It works densely and provides a high brushing effect.
For this reason, a well-balanced cleaning force can be obtained on both the narrow portion and the smooth surface.

The shape of the distal end surface formed by connecting the distal end surfaces 6 of the respective hair bundles 4a and 4b is generally the concave shape, the convex shape,
When the slope shape is formed into a surface shape that is arbitrarily combined, the effects of the respective surface shapes described above can be simultaneously exhibited.

In consideration of the flexibility of the hair bundle and the usability in the oral cavity, the brush length of the hair bundle forming the block pattern is, as shown in FIG. 2, the maximum height H = 6 to 12 mm (for children). In case of H = 6 ~ 11mm, in case of adult use H8 ~
12 mm). When the tip end surface of each hair bundle is formed on a surface other than a flat surface, the step d between the highest part and the lowest part is less than 3 mm, more preferably d.
= 2 mm or less, a toothbrush with more excellent usability can be obtained.

The number of bristle bundles 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.

Further, one block pattern is formed.
The area of the block connecting the outermost circumference of the hair bundle group with a virtual line is small.
If too much, the effect of holding the dentifrice will not be sufficient,
If it is too large, the operability of the toothbrush in the oral cavity will deteriorate
I will. Therefore, the block surface surrounded by the envelope
The product is just large enough to fit one tooth
Desirable in terms of brushability and operability. Express this as area
And 10 to 100 mm² This area is assumed to be true
If expressed as a circle, a circle with a diameter of about 3.5 to 11.3 mm
Becomes

As a material of the brushes constituting each bristle bundle, a commonly used polyamide (for example, nylon 6-1) is used.
2, 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 section 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 hair bundle is 3 to 10 m.
il (0.076 to 0.254 mm), preferably 5 to
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 forming the block pattern need not all have the same brush diameter even if they have the same cross-sectional shape. For example, 6 mil (0.152 mm) and 7 mil (0.178 mm) , Usability,
It can be appropriately selected in consideration of the brush feeling, the cleaning effect, and the like. Further, the number of block patterns formed on the toothbrush head may be one set, or two sets as shown in FIG.
Alternatively, it may be more.

In consideration of the usability, the brushing feeling, the cleaning effect, and the like, the overall shape of the block, the shape of each bristle bundle, the arrangement pattern, the brush diameter, etc. may be varied for each block pattern. Further, the entire flocked surface may be configured in combination with other independent hair bundles other than the hair bundles forming a unitary block pattern.

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 molded handle in which these resins are combined with each other or with a thermoplastic elastomer. If the brush and handle that make up the hair bundle are made of the same material, it will be advantageous for disposal after use and recycling, and if a resin material with good biodegradability is used, good disposal will be achieved. Can be.

The bristle bundles arranged around the center point O are not necessarily all the same in shape and are not necessarily equidistant from the center point O, but may be any combination of shapes and distances. It is preferable that the number of hair bundles having the same cross-sectional shape is larger from the viewpoint of hair management used for mold production and production. When 50 to 100% of the hair bundle groups forming one block pattern have the same cross-sectional shape, brushing is performed. This is more preferable because unevenness of polishing and polishing are reduced and uniformity is improved.

Since the greater the number of bristle bundles equidistant from the center point O, the higher the symmetry, the unevenness of brushing and polishing is reduced, and the uniformity is improved. In particular, when 50 to 100% of the hair bundle groups forming one block pattern are arranged at the same distance, the unity of the hair bundle groups becomes higher, unevenness of brushing and polishing is reduced, and uniformity is further improved. Also, the aesthetic appearance of the toothbrush is more preferable.

Further, the distal end face 6 of each of the hair bundles 4a and 4b forming the block pattern is not limited to a smooth and uniform surface shape. For example, as shown in FIG.
By forming various uneven patterns on the surface, a non-uniform surface shape may be formed. As described above, by forming various uneven patterns on the hair bundle tip surface, not only the entire block pattern composed of the hair bundle group but also individual hair bundles 4 can be formed.
The dentifrice can be held effectively even at the tips of a and 4b, and the holding power of the dentifrice can be further increased.

FIGS. 10 and 11 show another example of the shape of the block pattern constituted by the hair bundle groups. FIG.
Is the center point O of six petal-shaped hair bundles 4 having the same cross-sectional shape.
11 shows an example in which four crescent-shaped hair bundles 4 having the same cross-sectional shape are arranged in the shape of a corolla around the center O. It is. The dotted line written in the bristle bundle 4 indicates the same brush height position in the bristle bundle. The dotted lines indicating the contour lines are drawn on only one hair bundle in each drawing in order to prevent the drawing from being difficult to see.

In FIG. 10, (a) shows an example in which the whole hair bundle is formed in a mortar or mountain shape, (b) shows an example in which the hair bundle is formed in a slope, roof or valley shape in units of hair bundle, and (c) shows an example. An example in which a hair bundle unit is formed into a partially flat concave or convex shape, and FIG. 3D shows an example in which a hair bundle unit is convexly convergent point or surface convergent, or a hair bundle unit is concave point or surface convergent unit. , (E) is an example in which a hair bundle is formed in a slope, roof or valley shape,
(F) shows an example in the case where the hair bundle is formed in a roof shape or a valley shape. Also, in FIG.
(A) is an example in which the whole hair bundle is formed in a mortar shape or a mountain shape,
(B) to (e) show an example in which a hair bundle is formed in a slope, a roof, or a valley shape, and (f) shows a point bundle or surface convergence in a hair bundle unit which is convex in a hair bundle unit, or a hair bundle. It shows an example in which a point is converged or a surface is converged concavely in units. FIGS. 12A to 12I show examples of the hair bundle tip surface shape when the hair bundle is not provided at the center point O of the block pattern as shown in FIGS. Note that FIG.
2 also shows only the shape of the hair bundle on the upper side of the head portion, and the portion buried in the head portion is not shown.

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.

Although various embodiments of the present invention have been described above, each bristle bundle forming a block pattern is actually a set of brushes, and when viewed in detail, each bristle bundle is clearly defined as shown. The cross section may not be, but this is acceptable. Also, due to the processing of a mold for shaping the cross-sectional shape of the hair bundle, the actual hair bundle does not form a clear corner particularly at the corner, and the corner R may be formed. It is acceptable. Further, in the above embodiment, a hair bundle tip surface shape having good symmetry is illustrated, but the shape is not limited to only a symmetric shape.
Applicable if there is a unity as a block.

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

[0048]

According to the toothbrush of the present invention described above, the following excellent effects can be obtained. (1) The toothbrush according to the first aspect uses a bristle bundle with a dense hair density of 64% or more, and arranges a plurality of bristle bundles with a dense hair density of 64% or more around a center point, and the plurality of bristle hairs A group of block patterns is formed around the center point by the bundle group, and the surface shape formed by connecting the leading end surfaces of the hair bundle groups forming the block pattern is substantially concave when viewed as a whole block pattern. As described above, the tip of each bristle is shaped, improving the holding effect of the dentifrice, making it easier to fit the complex curved surface of the tooth,
Particularly, the polishing property is improved. In addition, the pressure applied at the time of brushing makes the length of the brush located on the outer circumference side of the group of hair bundles constituting the block pattern moderate, and efficiently reaches the plaque-accumulating portion such as the cervical region, and prints. The cleaning effect, particularly the polishing effect, can be enhanced.

(2) The toothbrush according to claim 2 is
A hair bundle having a dense hair degree of 64% or more is used, a plurality of hair bundles having the dense hair degree of 64% or more are arranged around a center point, and a plurality of hair bundle groups collectively around the center point. While forming the block pattern, the tip of each hair bundle was shaped so that the surface shape formed by connecting the tip surfaces of the hair bundle groups forming the block pattern was substantially concave when viewed as a whole block pattern. Therefore, while holding the dentifrice in a group of hairs with a high density of hair, it is easy for plaque and stain to accumulate and the hair tips reach a narrow part of the oral cavity that is difficult to drop, making it easy to concentrate care in such parts Can do it.

(3) The toothbrush according to claim 3 is
A hair bundle having a dense hair degree of 64% or more is used, a plurality of hair bundles having the dense hair degree of 64% or more are arranged around a center point, and a plurality of hair bundle groups collectively around the center point. While forming the block pattern, the tip of each hair bundle was shaped so that the surface shape formed by connecting the tip surfaces of the hair bundle groups forming the block pattern was inclined when viewed as the entire block pattern. Therefore, as in the case of making the whole convex, the brush tip of the long brush length efficiently reaches the recessed part where plaque easily accumulates, such as the cervical part and interdental part, and enhances the cleaning effect At the same time, on the inclined surface, the bristle tips act densely on the tooth smooth surface, a high brushing effect is obtained, and a well-balanced cleaning force can be obtained on both the narrow portion and the smooth surface.

(4) The toothbrush according to claim 4 is
A hair bundle having a dense hair degree of 64% or more is used, a plurality of hair bundles having the dense hair degree of 64% or more are arranged around a center point, and a plurality of hair bundle groups collectively around the center point. While forming the block pattern, the tip of each hair bundle was shaped so that the surface shape formed by connecting the tip surfaces of the hair bundle groups forming the block pattern was inclined when viewed as the entire block pattern. Therefore, the claims 1 to 3
The effect of the toothbrush can be exhibited at the same time,
It is possible to provide a toothbrush having more excellent dentifrice holding power and polishing properties.

(5) The toothbrush according to claim 5 is
The toothbrush according to any one of claims 1 to 4, wherein the tip end surface of each of the shaped bristle bundles is formed into a non-uniform surface shape. The dentifrice can also effectively hold the dentifrice even at the tip end, and the dentifrice holding power can be further improved.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA in FIG.

FIGS. 3A to 3D are explanatory diagrams illustrating an example of a method of contouring a hair bundle tip.

FIGS. 4A to 4G are cross-sectional views taken along the line AA showing other examples of the shape of the front end surface of the block pattern that becomes substantially concave.

5 (a) to 5 (i) are cross-sectional views taken along line AA showing still another example of the shape of the front end face of the block pattern which becomes substantially concave.

6 (a) to 6 (h) are cross-sectional views taken along the line AA showing examples of the shape of the front end surface of the block pattern which becomes substantially convex.

FIGS. 7 (a) and 7 (b) are cross-sectional views taken along the line AA showing an example of the shape of the front end surface of a block pattern that becomes a slope.

FIGS. 8A to 8I are diagrams showing examples of block pattern tip surface shapes in which convex shapes, concave shapes, and inclined shapes are arbitrarily combined.

FIGS. 9A to 9J are diagrams showing examples of the shape of the end face of a hair bundle.

FIGS. 10A to 10F are plan views showing other examples of the shape of the block pattern.

11A to 11F are plan views showing still another example of the shape of the block pattern.

FIGS. 12A to 12I are diagrams showing examples of the hair bundle tip end surface shape when no hair bundle is provided at the center point O of the block pattern.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head part 2 Flocked surface 3 Buried hole 4, 4a, 4b Hair bundle 5 Brush constituting a hair bundle 6 Tip surface of hair bundle

 ────────────────────────────────────────────────── ─── 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 EF03 EF04 EF06 EG03 HA03

Claims (5)

[Claims] 1. A toothbrush in which a plurality of bristles with brushes are planted on a flocked surface of a head portion, wherein the bristles having a degree of dense hair of 64% or more are used. A plurality of hair bundles are arranged around a point, and a group of block patterns are formed around the central point by the plurality of hair bundle groups, and the end faces of the hair bundle groups forming the block pattern are formed continuously. A toothbrush characterized by shaping the tip of each bristle bundle so that the surface shape is substantially concave when viewed as a whole block pattern. 2. 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 dense bristle degree of 64% or more is used. A plurality of hair bundles are arranged around a point, and a group of block patterns are formed around the central point by the plurality of hair bundle groups, and the end faces of the hair bundle groups forming the block pattern are formed continuously. A toothbrush characterized by shaping the tip of each bristle bundle so that the surface shape becomes substantially convex when viewed as a whole block pattern. 3. A toothbrush in which a plurality of bristles with brushes are planted on a flocked surface of a head portion, wherein the bristles having a degree of dense hair of 64% or more are used. A plurality of hair bundles are arranged around a point, and a group of block patterns are formed around the central point by the plurality of hair bundle groups, and the end faces of the hair bundle groups forming the block pattern are formed continuously. A toothbrush characterized by shaping the tip of each bristle bundle so that the surface shape becomes a slope when viewed as a whole block pattern. 4. A toothbrush having a plurality of bristle bundles each having a bundle of brushes planted on a flocked surface of a head portion, wherein a bristle bundle having a degree of dense bristles of 64% or more is used. A plurality of hair bundles are arranged around a point, and a group of block patterns are formed around the central point by the plurality of hair bundle groups, and the end faces of the hair bundle groups forming the block pattern are formed continuously. A toothbrush characterized in that the ends of each bristle bundle are shaped so that the surface shape becomes an arbitrary combination of a convex shape, a concave shape, and a slope when viewed as a whole block pattern. 5. The toothbrush according to claim 1, wherein a tip end surface of each of the shaped bristle bundles is formed into a non-uniform surface shape.