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Tooth brush

A technology for a toothbrush and a covering part, which is applied to brushes, brush bodies, instruments, etc., can solve the problems of poor anti-skid property of the handle part and poor chirality of the toothbrush, so as to not easily adhere to dirt, improve the chirality and Anti-slip, easy-to-operate effect

Active Publication Date: 2009-04-29
LION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the coefficient of friction of the elastomer resin is low or the covering area of ​​the grip part is not large, there is a problem that the slip resistance of the grip part is relatively poor.
Furthermore, when the hardness of the elastomer resin is relatively hard or the thickness of the covering material of the grip part is relatively thin, there is a problem that the fit of the toothbrush is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative example 1～4

[0081] As the above-mentioned styrene-based elastomer resin, a resin having a rubber hardness of 20 ("Thermolast K" of KRAIBURG, Germany) was used. In addition, the thickness of the covering portion formed by molding the covering material was set to 3 mm. In addition, the coefficient of friction of the surface of the covering part was set to three types: 0.5, 1.0, and 2.0, and the ratio of the surface area of ​​the covering part to the surface area of ​​the gripping part was set to three types: 50%, 70% and 90%, thereby manufacturing examples. 1-3 and the toothbrush samples of Comparative Examples 1-4.

Embodiment 4～7 and comparative example 5～8

[0097] Next, the ratio of the surface area of ​​the covering portion to the surface area of ​​the gripping portion was set to 90%, and the rubber hardness of the styrene-based elastomer resin used was set to 15, 40, and 60 (Septon of Kuraray Co., Ltd. CJ103", "Septon CJ102", "Septon CJ002"), and the thickness of the covering part was set to three kinds of 1, 2, and 3 mm to manufacture the toothbrush samples of Examples 4-7 and Comparative Examples 5-8.

Embodiment 8

[0113] A styrene-based elastomer resin with a rubber hardness of 20 ("Thermolast" of KRAIBURG, Germany) was used as the covering material, and about 90% of the surface of the gripping part was covered with an average thickness of 3mm to form a covering with a coefficient of friction of 2. Overlay, make a toothbrush sample.

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Abstract

A tooth brush capable of providing excellent fitting property when a holding part is grasped from any direction and excellent sliding prevention property in any direction of the holding part. The tooth brush comprises a head part (2) in which tufts (1) are implanted, a neck part (3), and the holding part (4). The holding part (4) further comprises a core part (5) formed of a hard resin material and a cover part (6) formed of a soft resin material put on the core part (5). The cover part (6) covers 70% or more of the surface of the holding part (5), and the coefficient of friction of the surface of the cover part (6) is one or higher.

Description

technical field [0001] The present invention relates to a toothbrush having a structure that fits well and does not slip easily. [0002] This application claims priority based on Japanese Patent Application No. 2004-177100 for which it applied on June 15, 2004, and uses the content here. Background technique [0003] Generally, the handle portion of a toothbrush is made of a hard thermoplastic resin, but there is a problem that it tends to slip when being held and has poor fit. For this reason, various toothbrushes having a structure in which a soft material such as a thermoplastic elastomer is coated on a grip portion to achieve both hand-holding and anti-slip properties have been proposed. [0004] Starting from such a technical background, as an example of a conventional toothbrush, the following toothbrush is provided, which has an elongated cavity and a holding member on the back side of the grip of the handle, and at least one protrusion for adding rigidity is provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A46B5/00A46B5/02
CPCA46B5/02A46B2200/1066A46B5/026A46B15/0085A46D3/005B29C45/1676B29L2031/425G09F23/0082
Inventor 关野荣一加藤孝夫
Owner LION CORP
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