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toothbrush

A toothbrush and rear-end technology, applied in the field of toothbrushes, can solve the problems of insufficient flexural strength of the head of the implantation strength and the like

Active Publication Date: 2021-05-11
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 bristles are fixed by driving a flat plate made of metal into a head made of resin, the strength of the hair transplant and the bending strength of the head may sometimes be insufficient. Sufficient situation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 5、 comparative example 1～ comparative example 7

[0082] The toothbrushes of Examples 1 to 5 and Comparative Examples 1 to 7 in which the neck portion 120 was formed were produced according to the specifications shown in the above-mentioned [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 of filaments made of PBT was implanted in the head by flat wire hair transplantation to produce a toothbrush.

[0083] The neck width in each example is the minimum position, the value obtained by D / W in each position where the distance from the rear end side ...

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Abstract

To provide a toothbrush with a thin head capable of obtaining good operability. The toothbrush has a head (110) arranged on the front end side and a hair bundle is implanted on the flocking surface (111), a neck (120) extending from the rear end side of the head, and a neck (120) extending from the rear end side of the neck. Set the handle portion (130). The thickness of the head is 2.0-4.0mm. The neck is formed so that the minimum width in the direction parallel to the flocking surface and perpendicular to the length direction of the handle is 3.5 mm or more and 4.5 mm or less, and the width is constant or gradually from the position of the minimum value to the rear end side. get bigger. When the width of the neck is W mm and the thickness in the direction perpendicular to the flocking surface is D mm, when the width of the neck gradually increases from the position of the minimum value to the rear end side, the position of the minimum value is used as the starting point , when the width of the neck is constant from the position of the minimum value to the rear end side, starting from the position of the minimum value on the front end side, parallel to the flocking surface, at a position 10mm away from the rear end side, by D / W The obtained value is not less than 0.7 and not more than 2.5, and the value obtained by D / W at the position where the width is the minimum value is obtained by D / W at a position 20 mm behind the starting point. The difference between the obtained values ​​is more than 0.05, and the D / W at the position 20 mm away from the rear end side of the starting point exceeds 1.0, and the D / W at the position 10 mm away from the rear end side of the starting point where the width is the minimum value Bending coefficient M(mm 4 )=W×D 3 165mm 4 Above, 625mm 4 the following.

Description

technical field [0001] The present invention relates to toothbrushes. [0002] This application claims priority based on Japanese Patent Application No. 2016-211879 for which it applied in Japan on October 28, 2016, and uses the content here. Background technique [0003] Patent Documents 1 to 3 propose a toothbrush in which the thickness of the head is reduced from the viewpoint of operability in the oral cavity 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 hair transplant in which bristles are fixed by driving a flat plate made of metal into a head made of resin, the strength of the hair transplant and the bending strength of the head may sometimes be insufficient. full situation. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: JP Unexamined Patent Pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A46B9/04A46B5/00
CPCA46B9/04A46B5/00A46B2200/1066A46B5/0029C08L23/10
Inventor 金丸直史龟井诚一
Owner LION CORP