toothbrush

Abstract

The present invention provides a toothbrush that does not cause warping, resin whitening, or cracks in the head of the flat wire type hair transplant method, ensures sufficient hair transplant strength, and is excellent in operability in the oral cavity. The toothbrush (1) is provided with a head (10) with a plurality of hair-planting holes (13) on the hair-planting surface (12), and the bundle of hair bundles with a plurality of bristles is folded into two by a flat wire (15) and inserted into the hair-planting holes (13), wherein, the thickness of the head (10) is more than 2.0mm and less than 4.0mm; the hair-planting hole density of the hair-planting hole (13) is 25 holes / cm 2 above; when the inner diameter of the hair-planting hole is X, the thickness of the flat wire is d, and X is more than 0.9mm and less than 1.3mm, the relationship of 0.37mm≤(X-d) / 2≤0.55mm is satisfied.

Description

technical field [0001] The present invention relates to toothbrushes. [0002] This application claims priority based on Japanese Patent Application No. 2017-005804 for which it applied in Japan on January 17, 2017, and uses the content here. Background technique [0003] In order to prevent periodontal disease, it is important to remove tartar in narrow gaps such as the neck and interdental areas. Therefore, the following studies have been carried out: in order to improve the penetration of the front end of the toothbrush into the narrow gap, use ultra-fine bristles at the front end; Study on the configuration interval of hair planting holes. [0004] It is very effective as a means to improve the penetration of the tip of the hair by reducing the size of the hair transplantation hole and the hair becomes easy to bend. However, because the hole becomes smaller, the amount of hair decreases, and the feeling of brushing will decrease. Therefore, the hair-implanting part me...

AI Technical Summary

Problems solved by technology

[0004] It is very effective as a means to improve the penetration of the front end of the hair by making the hair transplantation hole smaller and the hair becomes easier to bend. However, because the hole becomes smaller, the amount of hair decreases, and the brushing feeling will decrease.

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