JPH09252841A - Toothbrush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the thin head of the plant section of a toothbrush from being curved or deformed at the time of hair planting and use, prevent the head section from being broken to hurt the inside of the mouth, and easily and effectively clean the inside of the mouth to all the corners. SOLUTION: This toothbrush is a handle constituted of a head section 1, a neck section 2, and a hold section 3. Brush bundles 4 are integrally fixed to the head section 2 thinner in thickness than the neck section 2 to form a plant section 5. A reinforcing upheaval section 6 is protruded by the thickness of the neck section 2 or below on the periphery of the brush bundle base sections or in the handle longitudinal direction between the brush bundles on the planted face side of the head section 1. The head section is not curved after plantation even if it is set to the thickness of 4mm or below, it is prevented from being curved or broken to maintain brushing in use, and it can effectively clean the inside of the mouth without damaging the inside of the mouth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a type in which a head portion is thinned, that is, a hair bundle is provided on the head portion by heat fusion or in-molding without using a flat wire for providing a hair-implanted portion. It is related to the toothbrush of.

[0002]

2. Description of the Related Art Generally, a toothbrush is manufactured by fixing a bundle of nylon or PBT hair with a piece of metal (referred to as a flat wire) to a plurality of hair-implanted holes provided in the head in advance. Polypropylene (PP) is generally used as the material of the parts in terms of cost and moldability. However, in order to facilitate the cleaning of every corner of the oral cavity, especially the back teeth, with a toothbrush, the thinner the head portion on which the brush is planted, the better the operability, but the thickness of the head portion is 5
If the thickness is less than mm, there is a problem that the head portion is curved due to stress due to flocking. As a method of not using a flat wire, a method of fixing a hair bundle to a head portion by heat fusion (for example, Japanese Patent Application No. 60-132097).
Japanese Patent Application No. 60-16730, Japanese Patent Application No. 1-251313
No. 2, etc.) or in-mold method (eg, Japanese Patent Application No. 5
No. 9-240403, Japanese Patent Application No. 61-68897, Japanese Patent Application No. 63-501377, etc.), a method of joining a base in which the ends of the entire hair bundle are fused to a brush base (Japanese Patent Publication No. 42-57).
No. 97), and the thickness of the head part is 2 to
It is known to be a thin head type of 4 mm (Japanese Patent Application No. 60-132097).

[0003]

However, in the conventional flocking type in which the head portion is thinned, stress due to flocking does not occur as compared with the flocking type in which a flat wire is used, but depending on the thickness of the head portion, it may occur during tooth cleaning. There is a risk that the head portion may be bent and deformed without maintaining the brushing force, or that the head portion may be broken depending on the hair transplantation pattern and the oral cavity may be damaged. In order to prevent such bending of the head portion, it is possible to use an engineering plastic resin such as nylon or polycarbonate or a polymer alloy such as PC / PBT as a material of the head portion, but a general-purpose resin such as PP. However, there is a problem that the cost is higher than that of, and the moldability is not good. Further, as a method for preventing the curving of the head portion, a toothbrush provided with a convex portion on the back surface of the head portion flocking surface (Japanese Patent Laid-Open No. 6-54717).
No.) has been proposed, it has the effect of preventing bending and bending in the vertical direction, but the effect of preventing bending and bending in the lateral direction was not always sufficient. INDUSTRIAL APPLICABILITY The present invention does not cause the hair to be planted or curved and deformed even when used with a thin head having a thickness of 1 to 4 mm using a general-purpose resin such as PP, and there is no fear of breaking the head portion and damaging the oral cavity. It is an object of the present invention to provide a toothbrush which can easily and effectively clean every corner at low cost.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a handle comprising a head portion, a neck portion, and a grip portion, which is a toothbrush in which a brush bundle is integrally fixed to a head portion having a thickness smaller than the thickness of the neck portion to form a brush portion. Around the base of the brush bundle on the flocked surface side of the head part,
Alternatively, a reinforcing ridge portion is provided between the bunch of brushes in the longitudinal direction of the handle so as to have a thickness equal to or less than the thickness of the neck portion.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the embodiment of the present invention, the head portion is reinforced along the flocked surface side of the head portion with the ridge portion, and the ridge portion is connected to the neck portion. Even if it is thin, there is no curving after flocking, and curving during use and breakage of the head part are prevented, brushing is maintained, and there is no risk of damaging the oral cavity and effective cleaning of the oral cavity is possible And Moreover, since it is reinforced by the ridges along the brush bundle base of the head part, it is possible to prevent bending in the head width direction (vertical direction) as well as the short width direction (horizontal direction) and maintain a stable brushing force. , Every corner of the mouth can be easily cleaned. Moreover, since the reinforcing ridge does not protrude beyond the thickness of the neck, a thin head has good operability, and inexpensive general-purpose resin such as PP can be used as the head material.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment of the present invention will be described with reference to the example of FIG. 1. A handle composed of a head portion 1, a neck portion 2 and a grip portion 3
A toothbrush having a bristling part 5 integrally fixed to a head part 1 thinner than the neck part 2 to form a bristling part 5, which is a handle on the flocking surface side of the head part 1 at the periphery of the bristling bunch or between the bunch bundles. The toothbrush has a reinforcing ridge portion 6 protruding in the longitudinal direction so as to have a thickness equal to or less than the thickness of the neck portion 2.

In this case, the head portion 1 and the neck portion 2 and the grip portion 3 are formed. The head portion 1 has a thickness of 1 to 4 mm, preferably 2 to 3 mm, and is thinner than the neck portion 2. The ridge portion 6 is provided along the edge of the ridge 1, and the thickness of the head portion of the ridge portion 6 is equal to or less than the thickness of the neck portion. Since the width of the raised portion 6 can be narrowed and the height can be reduced, it is preferable to integrally form the head portion 1 at the time of injection molding from the viewpoint of cost, strength, appearance, and the like, and the head portion can be made thinner than 4 mm. Even after the hair is transplanted, no curving occurs, and curving during use and breakage of the head part are prevented, brushing is maintained, and there is no risk of damaging the oral cavity, enabling effective cleaning of the oral cavity. be able to. In addition, for flocking the hair bundle to the head part 1, heat fusion flocking, in-mold flocking, etc. are used.
Using general-purpose resin material such as PP, and 1 to 4 mm
In the case of a thin head, in-mold flocking is preferable from the viewpoint of flocking strength. Further, the length, height and width of the raised portion 6 can be appropriately set depending on the length, thickness and width of the head portion 1 and the thickness of the neck portion 2.

In the embodiment shown in FIG. 2, a reinforcing ridge 6 is provided on the entire peripheral edge of the head portion 1 so as to have a thickness equal to or less than the thickness of the neck portion 2. It is also possible to extend the reinforcing ridges 6 between them, for example, to provide them in a vertical, horizontal grid, or vertical and horizontal grid pattern.

In the example of FIG. 3, a plurality of reinforcing ridges 6 provided on the inner surface side of the head portion 1 are formed between the rows of the brush bundle 4 so that the thickness thereof is not higher than the thickness of the neck portion. ,
The head part 1 is not curved after being planted,
Moreover, since the raised portion 6 is on the side of the bristling surface, the toothbrush can be a thin head toothbrush excellent in operability during brushing of the toothbrush. By providing only the ridge 6, the depth of the hair-implanted hole or the hair-implanted length can be made uniform. Further, since the raised portion 6 does not project more than the thickness of the neck portion, a thin head having good operability, and a versatile resin such as PP, which is inexpensive, can be used as the head portion material.

The concrete example of FIG. 4 is an example in which the head portion 1 is provided with a raised portion 6 from the neck portion 2 toward the tip of the head portion. The raised portion 6 tapers toward the tip, and a brush including a hair-implanting hole is provided. It is provided between the rows of the bundle 4, and the head portion 1 is prevented from being bent so that the head portion 1 does not bend after being transplanted, and the brushing force is maintained, thereby enabling effective brushing in the oral cavity. You can do it.

In the example shown in FIG. 5, the protrusions 6 are provided between the rows of the bunch of brushes 4 and have different lengths and extend from the neck portion 2 side toward the tip. This is to enable effective brushing effect.

In the embodiment shown in FIGS. 6 and 7, the head portion 1 is a brush having a thickness of 1 to 4 mm and thinner than the neck portion, and the annular rib portion 7 protrudes from the surface of the bristle portion on the outer periphery of the brush bundle base.
And the annular rib portions 7 are connected to each other by the raised portions 6. In this case, the raised portion 6 can be appropriately selected and provided in the major axis direction of the toothbrush or an oblique direction with respect to the major axis, the major axis direction + minor axis direction, and the major axis direction + oblique direction. The raised portions 6 do not have to be provided between the annular rib portions 7, and may be appropriately selected depending on the length, thickness, width, shape of the head portion 1, the thickness of the neck portion 2, the number of tufts, and the arrangement pattern. To be selected. Since the head portion 1 is reinforced by the raised portion 6 on the flocked surface side, the annular rib portion 7 and the raised portion 6 are provided.
It is possible to make the thickness of the head part as thin as possible regardless of the thickness of the head part, and it is possible to obtain a toothbrush with excellent operability in the oral cavity. Even if 1 is thinned, it is possible to obtain sufficient flocking strength. In addition, the raised portion 6 and the annular rib 7 are the neck 2
Since it does not protrude more than the thickness, it is possible to use a versatile resin such as PP, which is a thin head, has good operability, and is inexpensive as a material for the head portion.

The features of the present invention include the following configurations. It comprises a head portion, a neck portion and a grip portion, and the thickness of the head portion 1 is 1 to 4 mm, preferably 2 to 3 mm and the neck portion 2
A thinner brush having a ridge portion 6 along the edge of the head portion 1, and the head portion thickness of the ridge portion 6 is equal to or less than the neck thickness. As for the toothbrush, the width of the raised portion 6 becomes narrower and the height becomes lower as it approaches the tip of the head portion. A toothbrush in which a plurality of reinforcing ridges 6 provided on the inner surface side of the head portion 1 are formed between rows of the brush bundle 4 so that the thickness thereof is not higher than the thickness of the neck portion. A brush having a head portion having a thickness of 1 to 4 mm and thinner than the neck portion is provided with an annular rib portion 7 projecting from the surface of the bristle portion on the outer periphery of the brush bundle base, and the annular rib portions 7 are connected to each other by a raised portion 6. Made toothbrush.

[0014]

Industrial Applicability The present invention is a handle comprising a head portion, a neck portion, and a grip portion. In a toothbrush in which a brush bundle is integrally fixed to the head portion having a thickness smaller than the thickness of the neck portion to form a bristle portion, the head portion is flocked. On the surface side, around the base of the brush bundle, or between the brush bundles, reinforcing ridges are projected in the longitudinal direction of the handle to be equal to or less than the thickness of the neck portion, so that the head portion is thinned to 4 mm or less. It does not cause back curve, and it prevents curving during use and breakage of the head part to maintain brushing and enable effective brushing of the oral cavity without the risk of damaging the oral cavity. Moreover, since it is reinforced by the ridges along the base of the brush bundle of the head part, the bending of the head part in the width direction as well as in the width direction is prevented, and a stable brushing force can be maintained to every corner of the mouth. easily It can sweep. Moreover, since the reinforcing ridge does not protrude beyond the thickness of the neck, a thin head has good operability, and inexpensive general-purpose resin such as PP can be used as the head material.

[Brief description of drawings]

1A and 1B show a part of an embodiment of the present invention, in which FIG. 1A is an enlarged plan view and FIG. 1B is a vertical sectional view taken along the line AA.

FIG. 2 shows a part of another embodiment of the present invention, (a) is an enlarged plan view, and (b) is a longitudinal sectional view thereof.

FIG. 3 is part of another alternative embodiment of the present invention,
(A) is an enlarged plan view and (b) is a longitudinal sectional view thereof.

FIG. 4 shows a part of another embodiment of the present invention, in which (a) is an enlarged plan view and (b) is a longitudinal sectional view thereof.

FIG. 5 is an enlarged plan view of a part of another embodiment of the present invention.

FIG. 6 further shows a portion of another embodiment of the present invention,
(A) is an enlarged plan view and (b) is a longitudinal sectional view taken along line BB.

FIG. 7 is a partial enlarged plan view of another embodiment of the present invention.

[Explanation of reference numerals] 1 head portion 2 neck portion 3 gripping portion 4 brush bundle 5 bristle implantation portion 6 reinforcing ridge portion 7 annular rib portion

Claims (1)

[Claims] 1. A toothbrush having a head portion, a neck portion, and a grip portion, wherein a brush bundle is integrally fixed to a head portion thinner than the thickness of the neck portion to form a bristle portion. A toothbrush characterized in that reinforcing ridges are provided around the bundle base or between the brush bundles in the longitudinal direction of the handle so as to have a thickness equal to or less than the thickness of the neck.