JP2003019029A - Toothbrush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toothbrush which is excellent in operability, enables a user to effectively clean all the corners in an oral cavity, is soft in contact with the teeth and is excellent in the touch of brushing and can be flocked with tufts with good uniformity in manufacturing. SOLUTION: The toothbrush constituted by flocking a plurality of the tufts 14, 14, etc., formed by bundling a plurality of bristles 13, 13, etc., to a bristle head 11, in which the sum (t+h) of the thickness (t) of the bristle head 1 and the height (h) of the tufts 14 from the surface 11a of the bristle head is 9 to 14 mm and the ratio (h/t) of the thickness (t) of the bristle head 11 and the height (h) of the tufts 14 from the surface 11a of the bristle head is 2.5 to 3.5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothbrush in which a plurality of tufts formed by bundling a plurality of bristles are planted on a bristle bed.

[0002]

2. Description of the Related Art In order to effectively clean up every corner of the oral cavity using a toothbrush, a "flocking part" consisting of a bristle table and tufts in the toothbrush.
L (see FIG. 1), that is, the sum (t + h) of the thickness t of the flocking table and the height h of the tufts from the surface of the flocking table is the posterior tooth space (gap between the inside of the cheek and the posterior tooth, average for adults). 14.0m
It is desirable that it is smaller than m) from the viewpoint of operability of the toothbrush. However, since toothbrushes are usually manufactured by a method of inserting and fixing tufts (hair bundles) into the tufts with a flat wire, the tufting strength (the tufts are difficult to come off from the tufting holes).
In order to maintain the above, the flocking table has a certain thickness (usually 5.
It was necessary to be 0 mm). Therefore, in order to reduce the thickness L of the bristles, there is no choice but to reduce the height h of the tuft, resulting in a toothbrush with a hard tooth contact and a poor brushing feeling. It was

As a proposal to solve these problems, there is provided a toothbrush in which tufts are flocked by a heat fusion method or an in-mold method to maintain the flocking strength and reduce the thickness t of the flocking table. Proposed (Japanese Patent Laid-open No. Sho 6)
1-76104, JP-A-6-54717,
JP-A-9-252841, JP-A-10-3326
No. 1, JP-A-10-52319, etc.).
It should be noted that the thinner the thickness of the flocking table, the better, and in order to maintain the strength of the flocking table and to tuft the tufts in a uniform manner, the height of the tufts (brissle) should be set on the flocking table. It is necessary to have an appropriate thickness corresponding to. However, conventionally, by devising the correlation between the thickness t of the flocking table of the toothbrush and the height h of the tufts, the operability is excellent,
There was no technical idea to obtain a toothbrush that can effectively brush every corner of the oral cavity, has a soft tooth contact, is excellent in brushing feeling, and can tuft the tufts evenly during the manufacturing process.

Therefore, the object of the present invention is based on a new technical idea, which is excellent in operability, can effectively brush every corner of the oral cavity, has a soft tooth contact, and is excellent in a feeling of brushing. An object is to provide a toothbrush capable of transplanting tufts with good bristles.

[0005]

As a result of various studies, the present inventors set the sum (t + h) of the thickness t of the flocking table and the height h of the tufts from the surface of the flocking table within a specific range, It was also found that the above object can be achieved by setting the ratio (h / t) of the thickness t of the flocking table to the height h of the tufts from the surface of the flocking table within a specific range.

The present invention has been made on the basis of the above findings, and in a toothbrush in which a plurality of tufts formed by bundling a plurality of bristles are planted on a flocking table, the thickness t of the flocking table and the tufts are set. The sum (t + h) with the height h from the surface of the flocking table is 9 to 14 mm, and the ratio (h) between the thickness t of the flocking table and the height h from the surface of the tuft flocking table.
The above object was achieved by providing a toothbrush with / t) of 2.5 to 3.5.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a preferred embodiment of the toothbrush of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the toothbrush 10 of the present embodiment has a plurality of tufts 14, 14, ..., Which are formed by bundling a plurality of bristles 13, 13 ,. It is a toothbrush. On the flocking table surface 11a, a plurality of cylindrical flocking holes 12 are aligned and formed. The tufts 14 are vertically planted from the flocking table surface 11a at substantially the same height in each flocking hole 12 by a known welding method, bonding method or in-molding method.
With respect to these points, the configuration is similar to that of the conventional toothbrush of this type.

In the toothbrush 10 of the first embodiment, as shown in FIG. 1, the toothbrush 10 has a thickness t and a height of the tufts 14 from the surface of the tufting table (hereinafter, simply referred to as "tufts"). Sum of height and h) (t +
h) is 9 to 14 mm, and the ratio (h / t) between the thickness t of the flocking table 11 and the height h of the tufts 14 is 2.5.
˜3.5. The thickness t of the flocking table 11 is preferably 2.0 to 4.0 mm, more preferably 2.5 to 4.0 mm.
The height h of the tufts 14 is 3.5 mm, preferably 7.0 to 10.0 mm, and more preferably 8.0 to 9.5.
mm. Also, a cross section of the tuft 14 (not shown)
Is substantially circular, and the diameter of the cross section is 0.6 to 1.2 mm.

The thickness t of the flocking table 11 and the height h of the tufts 14
When the sum (t + h) is less than 9 mm, the operability of the toothbrush in the oral cavity is improved, but the rigidity of the tuft becomes too high, the tooth contact becomes hard, and the feeling of brushing becomes poor, and the (t + h) Is more than 14 mm, it is larger than the posterior tooth gap (gap between the inner side of the cheek and the posterior tooth, average 14.0 mm in adults), and the operability of the toothbrush is particularly poor when brushing the inner part of the posterior tooth. If the ratio (h / t) between the thickness t of the flocking table 11 and the height h of the tufts 14 is less than 2.5, the height h of the tufts 14 is too small compared to the thickness t of the flocking table 11. If the tuft is too rigid, the tooth contact is hard and the brushing feeling is poor, and if the (h / t) is more than 3.5, the flocking table 1
Since the height h of the tufts 14 is too large as compared with the thickness t of 1, the tufts are likely to be inclined at the time of manufacturing, and it becomes difficult to plant the hairs with good hair alignment. When the diameter of the cross section of the tuft 14 is less than 0.6 mm, the rigidity of the tuft is lowered, so that the effect of removing plaque is lowered and the durability of the toothbrush is lowered, and the diameter is 1. When it is more than 2 mm, the rigidity of the tuft becomes high, the tooth contact is deteriorated and the soft feeling is lost, the usability is deteriorated, and it is difficult for the bristles to enter the tooth gap, and the tooth brushing is efficiently performed. You can't do it.

The bristles 13 forming the tufts 14
Is a filament material made of synthetic resin such as nylon, and may be either a monofilament or a multifilament. Its diameter is preferably 150-250 μm
And more preferably 180 to 230 μm.

According to the toothbrush 10 of this embodiment, the sum (t + h) of the thickness t of the flocking table and the height h of the tuft is 9 to 1.
Due to the fact that the ratio (h / t) between the thickness t of the flocking table and the height h of the tufts was set to 2.5 to 3.5,
It has excellent operability, can effectively brush every corner of the oral cavity, and can soften the tooth contact to provide an excellent brushing feeling, and at the same time, can tuft the tufts with good hair alignment during production. In the toothbrush 10 of the present embodiment, the tuft 14
Has a substantially circular cross section, and has a diameter of 0.6 to 1.2 m.
Since it is m, the tooth contact and the brushing feeling are more excellent.

The preferred embodiment of the toothbrush of the present invention has been described above. However, the toothbrush of the present invention is not limited to the above-described embodiments, and is as follows, without departing from the spirit of the present invention. It can be changed as appropriate.
The tufts 14 are provided on the surface 11 of the flocking table as in the above embodiment.
The plant is not limited to be planted vertically to a, and may be planted at an angle. The height h of the tuft 14 is
As in the above embodiment, the tufts are not limited to being substantially uniform, and tufts having a low height may be partially provided. The cross section of the tuft 14 is not limited to a substantially circular shape as long as the tuft 14 can be closely attached to the tufting hole 12 and can be formed into various shapes. The flocked holes 12 are not limited to cylindrical ones. Further, the shape of the bristle tip of the toothbrush of the present invention is not particularly limited, and may be any shape such as a normal round cut, a spherical shape, a taper shape, or a tip shape.

[0013]

EFFECTS OF THE INVENTION According to the toothbrush of the present invention, the operability is excellent, and it is possible to effectively clean up every corner of the oral cavity and to soften the tooth contact to provide an excellent brushing feeling. Allows tufts to be planted well during production.

[Brief description of drawings]

FIG. 1 is a side view showing the vicinity of a hair-implanting base of a toothbrush according to an embodiment of the present invention.

[Explanation of symbols]

10 toothbrush 11 flocking stand 11a Surface of flocking table 12 hair transplant holes 13 Bristle 14 tufts t Thickness of flocking table h Height from tufting table surface of tufts

Claims (2)

[Claims] 1. A toothbrush in which a plurality of tufts formed by bundling a plurality of bristles are planted on a flocking table, wherein the sum of the thickness t of the flocking table and the height h of the tufts from the surface of the flocking table ( t + h) is 9 to 14 mm, and the thickness t of the flocking table and the height h from the surface of the tuft flocking table are h.
A toothbrush having a ratio (h / t) of 2.5 to 3.5. 2. The toothbrush according to claim 1, wherein the tuft has a substantially circular cross section, and the diameter of the cross section is 0.6 to 1.2 mm.