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Toothbrush

A toothbrush and neck technology, applied in the field of toothbrushes, can solve the problems of insufficient flexural strength of the head with the strength of implantation, and achieve the effect of good operability in the oral cavity

Active Publication Date: 2018-11-09
LION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, in the case of a flat wire type hair transplant in which a metal flat wire is driven into a head made of resin to fix the bristles, the strength of the hair transplant and the bending strength of the head may be insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0117] (Examples 1-5, Comparative Examples 1-7)

[0118] The toothbrushes of Examples 1-5 and Comparative Examples 1-7 in which the neck part 120 was formed were produced according to the specification shown in said [Table 1]. The width, length, thickness, and shape of the head and the handle are all the same. Injection molding PP resin to obtain Figure 3-4 The integral molding of the head and the handle body described in (from the front end of the head to the handle body, the arrangement of the hair-planting holes is 3 holes × 1 row, 4 holes × 6 rows, 3 holes × 1 row. The width of the head 10mm, length 25mm, thickness 3.0mm. The length of the handle body is 110mm. The length of the neck is 48mm). A bundle of tapered bristles (7.5 mil) formed by filaments made of PBT was implanted into the head by flat wire bristle implantation to make a toothbrush.

[0119] In each example, the position where the width of the neck is the smallest, and the values ​​obtained by D / W in the p...

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PUM

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Abstract

Provided is a toothbrush having a thin head with which good operability can be obtained. This toothbrush is provided with a head portion (110), which is disposed at the tip side and has a bristle setting surface (111) in which a bundle of bristles is set, a neck portion (120), which extends to the rear end side of the head portion, and a handle portion (130), which extends to the rear end side ofthe neck portion. The thickness of the head portion is 2.0-4.0 mm. The neck portion is formed in such a manner that the minimum value for the width in a direction that is parallel to the bristle setting surface and orthogonal to the longitudinal direction of the handle portion is 3.5-4.5 mm, inclusive, and the width remains constant or increases gradually from the position of said minimum value toward the rear end side. If the width at a position separated by 10 mm from the position of said minimum value in the neck portion toward the rear end side parallel to the bristle setting surface is defined as W mm and the thickness in a direction that is orthogonal to the bristle setting surface is defined as D mm, the value of D / W is 0.7-2.5, inclusive, and the coefficient of bending M (mm4) = W*D3 is 165-625 mm4, inclusive.

Description

technical field [0001] The present invention relates to toothbrushes. [0002] This application claims priority based on Japanese Patent Application No. 2016-045368 filed in Japan on March 9, 2016 and Japanese Patent Application No. 2016-211879 filed in Japan on October 28, 2016, which are incorporated herein by reference its content. Background technique [0003] In Patent Documents 1 to 3, toothbrushes in which the thickness of the head is reduced are proposed from the viewpoint of intraoral operability and the like. When the thickness of the head is made thin, there are problems such as a decrease in strength. Therefore, a high-strength resin such as polyacetal resin (POM) is used. In particular, in the case of a flat wire type flocking in which a metal flat wire is driven into a head made of resin to fix bristles, the flocking strength and the folding strength of the head may be insufficient. [0004] [Prior art literature] [0005] [Patent Document] [0006] [Pate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A46B5/00A46B9/04
CPCA46B9/04A46B5/00A46B2200/1066
Inventor 金丸直史龟井诚一
Owner LION CORP