JPH1057144A - Brush and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush which suppresses the growth of fur and bacteria in the root parts of bristle bundles, is sanitary and is recyclable. SOLUTION: This brush is formed by providing a brush base plate 1 with plural flocking holes 3 opened in the surface of the brush base plate 1 and a resin injection hole 4 connecting to these flocking holes 3 and fixing the bristle bundles 2 inserted into the flocking holes 3 by a resin injected into the flocking holes 3 from the resin injection hole 4. In such a case, the brush base plate 1 and the bristle bundles 2 are fixed by the resin injected from the resin injection hole 4 and, therefore, even if the brush is wetted with water, the water does not intrude down to the root parts of the bristle bundles 2. Even if the used brushes are recovered, the pulverization and dissolution of the brushes as they are possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush, such as a toothbrush or a body brush, to be put in a mouth or used in a place where it gets wet with water and a method for manufacturing the brush.

[0002]

2. Description of the Related Art Generally, as shown in FIGS. 4 and 5, a brush of this type is provided with a flocked hole 12 on the surface of a brush base 11. As shown in FIG.
Are formed, and the hair bundle 13 is inserted into the flocking hole 12,
The inserted hair bundle 13 is inserted into a flat line 14 with respect to the flocking hole 12.
It is formed by embedding and fixing a metal fitting called a so-called metal fitting.

[0003] Such a brush is provided at the base of the hair bundle 13,
In particular, there is a problem that the drainage of the flat line 14 is poor and that the scale of the hair bundle 13 tends to generate scales and germs.

Therefore, as proposed in Japanese Utility Model Publication No. 7-55938, a vent hole is formed in the inner bottom surface of the flocking hole so that water at the root of the hair bundle is discharged from the vent hole. There have been attempts to prevent the generation of scale and germs at the base of the hair bundle.

[0005]

However, since such a brush uses a metal flat wire for fixing the bristle bundle to the flocking hole, when the resin forming the brush base is to be reused, There is a problem that the cost is required to separate the resin and the metal, and the resin cannot be reused.

An object of the present invention is to provide a brush which is not only sanitary by suppressing the occurrence of scale and germs at the root of the hair bundle, but which can be reused after it has been used. It is in.

[0007]

In order to solve these problems, according to the present invention, a brush base is provided with a plurality of flocked holes opened on the surface of the brush base, and a resin injection hole continuous with the flocked holes. And a brush in which the hair bundle inserted into the flocking hole is fixed to the flocking hole by the resin injected into the flocking hole from the resin injection hole.

As a method of manufacturing the brush base, a plurality of flocked holes opened on the surface of the brush base and a resin injection hole continuous with the flocked holes are provided on the brush base, and a bristle bundle is inserted into the flocked hole. Thereafter, a resin is injected from the resin injection hole toward the flocking hole, and the hair bundle inserted into the flocking hole is fixed to the flocking hole with the resin.

[0009] In the brush thus manufactured, the hair bundle inserted into the flocking hole is fixed to the flocking hole by the resin injected from the resin injection hole. Water does not enter.

Further, since a flat wire is not required for fixing the bristle bundle to the flocking hole, by using the same resin as the brush base for the resin to be injected, even if the used brush is collected, It can be crushed or melted as it is.

[0011]

FIG. 1 shows a brush according to the present invention. This brush has a resin brush base 1 and
And a bristle bundle 2 provided on the brush base 1.

The brush base 1 is formed of a suitable resin such as a polypropylene resin, an acrylonitrile-styrene resin, an acrylonitrile-butadiene-styrene resin, and a polycarbonate resin.

A plurality of flocked holes 3 are formed on the surface of the brush base 1 as shown in FIG. The inner diameter of the flocking hole 3 is smaller at the lower end 3b than at the opening 3a.

A resin injection hole 4 is provided inside the brush base 1 so as to open on the outer surface of the brush base 1. The resin injection hole 4 branches inside the brush base 1 and communicates with the lower end 3 b of each of the flocking holes 3.

The hair bundle 2 is folded into two and inserted into the flocking hole 3. The bristle bundle 2 is fixed inside the flocking hole 3 by the same resin 5 as the brush base 1 injected into the resin injection hole 4.

FIG. 3 schematically shows a process of manufacturing the brush.

First, as shown in FIG. 3A, a hair bundle 2 having an appropriate thickness is folded into two.

Next, a plurality of flocked holes 3 opened on the surface of the brush base 1 and a resin injection hole 4 continuous with the flocked holes 3
As shown in FIG. 3B, the brush base 1 provided with
The bristle bundle 2 is inserted into the flocking hole 3 of the brush base 1 so that the bent portion 2a reaches the resin injection hole 4. At this time, the inserted bristle bundle 2 tends to spread inside the flocking hole 3, but since the inner diameter of the lower end 3 b of the flocking hole 3 is small, the bristle bundle 2 is not easily caught by the lower end 3 b and comes out.

Then, as shown in FIG. 3C, when the resin 5 is injected into the resin injection hole 4 from the outer surface of the brush base 1,
This resin 5 penetrates into the flocking holes 3 along the hairs of the hair bundle 2,
The hair bundle 2 is firmly fixed to the flocking hole 3 by being hardened as it is.

In such a brush, since the bristle bundle 2 inserted into the flocking hole 3 is fixed by the resin 5 injected from the resin injection hole 4, even if the brush is wet with water and used, it reaches the root of the bristle bundle 2. Water does not enter. In addition, the water that has entered the flocked hole 3 is easily discharged by lightly shaking the brush after use, so that the hair bundle 2 is easy to dry, and water scale and various germs are hardly generated.

At this time, the resin injection hole 4 of each flocking hole 3 is
Since the resin is branched from one resin injection hole 4, the resin injected from the outer surface of the brush base 1 spreads to the plurality of flocked holes 3 at a time, so that the resin 5 can be easily injected.

Further, unlike the conventional brush, a metal flat wire is not required for fixing the bristle bundle 2, so that the resin 5 to be injected is the same as the resin forming the brush base 1 and the bristle bundle 2. By using, the used brush can be crushed or melted as it is, and the resin used for the brush can be reused.

[0023]

As described above, in the brush manufactured by the method according to the present invention, since the brush base and the bristle bundle are fixed by the resin injected from the resin injection hole, the brush is used after being wet with water. Even if water does not enter the root of the hair bundle. For this reason, even if you use a brush, the hair bundle is easy to dry,
It is hygienic because it does not cause the generation of scale and germs.

In addition, since a metal flat wire is not used to fix the bristle bundle to the flocking hole, if the brush base or the bristle bundle is made of resin, even if used brushes are collected, Since it can be crushed or melted as it is, recycling is possible without a large cost.

Further, by providing the resin injection hole of each flocking hole branching from one resin injection hole, the resin injected from the outer surface of the brush base is supplied to a plurality of flocking holes at once. It becomes easier to inject the resin.

[Brief description of the drawings]

FIG. 1 is a side view showing a brush according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of the above.

FIG. 3 is an explanatory view showing a manufacturing process of the embodiment.

FIG. 4 is an enlarged cross-sectional view showing a state of attaching a bristle bundle in a conventional brush.

FIG. 5 is a plan view of the above.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 brush base 2 hair bundle 3 flocking hole 3 a opening of flocking hole 3 b lower end of flocking hole 4 resin injection hole 5 resin 11 brush base 12 bristle bundle 13 flocking hole 14 flat line

Claims (3)

[Claims] A brush base is provided with a plurality of flocked holes opened on the surface of the brush base and a resin injection hole continuous with the flocked holes, and the bristle bundle inserted into the flocked holes is filled with the resin. A brush fixed to the flocked hole by a resin injected into the flocked hole from the hole. 2. The brush according to claim 1, wherein a resin injection hole of each flocking hole is provided to branch off from one resin injection hole. 3. A brush base is provided with a plurality of flocked holes opened on the surface of the brush base and a resin injection hole continuous with the flocked holes. A method for manufacturing a brush, comprising: injecting a resin from an injection hole toward a flocking hole; and fixing the bristle bundle inserted into the flocking hole with the resin to the flocking hole.