Toothbrush

Abstract

The present invention provides a toothbrush that has a flat-plate implanted head section in which warpage, resin whitening and cracks are prevented, ensures sufficient implanted bristle strength, andis easy to handle in the mouth. This toothbrush (1) is provided with a head section (10) having a plurality of bristle implanting holes (13) on the bristle implanted surface (12), and bundles of a plurality of bristles are folded into two parts and implanted in the bristle implanting holes (13) using flat plates (15). The thickness of the head section (10) is 2.0-4.0 mm, the bristle implanting hole density of the bristle implanting holes (13) is 25 holes / cm<2> or more, and the toothbrush satisfies the relationship: 0.37 mm <= (X - d) / 2 <= 0.55 mm, wherein X is the inner diameter of the bristleimplanting holes, d is the thickness of the flat plates, and X is 0.9-1.3 mm.

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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