Toothbrush

Inactive Publication Date: 2013-07-25
SUZUKI TSUYOSHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patent text is to provide a toothbrush that can easily and accurately brush the side surfaces and clearances of teeth, including molars and premolars, as well as the rear surfaces of incisors. This solves the conventional problem of difficulty in effectively brushing these areas with a toothbrush.

Problems solved by technology

First, when teeth were brushed by the use of this kind of the conventional toothbrush 50, it was extremely difficult to brush, particularly, second premolars, first molars, and second molars which were located in the back of the oral cavity.
As a result, it was extremely difficult to brush the tooth root 74 of the rear side 70 of the incisor 69 by the conventional toothbrush 50.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0082]As described below, comparison experiments were performed on a toothbrush 10 related to the embodiment and a conventional toothbrush 50 with the head-end face portion of the bristle tuft unit of the block head formed flat.

[0083]1) Insertion Angle of the Block Head into the Oral Cavity

[0084]Investigation was made on the angle made by the toothbrush block handle and the median line between central incisors when an interdental portion of the upper right second molar and the upper right first molar was cleaned. In Table 1, the upper column indicates the angle made by a conventional toothbrush and the lower column by a toothbrush related to the present invention.

[0085]In this case, it is assumed that the smaller the above-mentioned angle made, the more available is the brushing free of unnecessary force to arms, hands, etc.

TABLE 1General toothbrush with bristle tufts of constantaround 50 degreeslengthToothbrush according to the present inventionaround 25 degrees

[0086]As shown in Ta...

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Abstract

To provide a toothbrush that can easily and surely brush, particularly, lateral sides of molars and premolars and rear surfaces of incisors. A toothbrush comprising a rod-like block handle and a bristle section having a bristle tuft unit composed with a plurality of bristle tufts and extended to the end part of the block handle, wherein the bristle tuft unit is equipped with a head-end bristle tuft unit disposed in the head end section and a level difference unit provided on the block handle side rather than on the head-end bristle tuft unit, having still shorter bristle tufts and at the same time, formed throughout a plane range larger than the head-end bristle tuft unit.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to toothbrushes and particularly to a toothbrush for easily brushing molars, premolars, and incisors.[0003]2. Description of the Related Art[0004]As illustrated in FIG. 10, in general, a toothbrush 50 has a rod-like block handle 51 and a bristle section 55 having a bristle tuft unit 54 composed with a plurality of bristle tufts 53 disposed of, extended to the end part of the block handle 51 via a block head 52 and extended to the end part of the block handle 51.[0005]Heretofore, in this kind of a conventional toothbrush 50, the bristle tuft unit 54 is formed in a rectangle shape on a flat surface way, and bristles have the same length from the top end portion to the rear end portion. The head end face portion 57 of the bristle tuft unit 54 is, therefore, formed flat.[0006]In this way, in the toothbrush 50 with the same bristle length size of the bristle bundle unit 51 and the head end face ...

Claims

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Application Information

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IPC IPC(8): A46B9/04
CPCA46B9/04A46B2200/1066A46B9/028
InventorSUZUKI, TSUYOSHI
OwnerSUZUKI TSUYOSHI