Electronic toothbrush and electronic brush

Abstract

An electronic toothbrush comprising: a brush head portion having a bristle portion, to be inserted into an oral cavity, for washing teeth; and a holder portion to be exposed outside the oral cavity, wherein TiO z which is an n-type semiconductor is provided so as to receive external light; and the n-type semiconductor is connected to a negative pole of a solar battery and an electrical potential is superimposed on the n-type semiconductor.

What is claimed is:  
     
         1 . An electronic toothbrush comprising: 
 a brush head portion having a bristle portion, to be inserted into an oral cavity, for brushing teeth;    a holder portion to be exposed outside the oral cavity;    an n-type semiconductor which is formed of TiO 2  and receives external light; and    a battery which is a solar battery having an output of more than 0.5 V and less than 3.0 V, connected only to the n-type semiconductor such that the n-type semiconductor is connected to a negative pole of the solar battery, and superimposes an electrical potential on the n-type semiconductor in order to synergically enhance a photocatalytic effect of the n-type semiconductor.    
     
     
         2 . The electronic toothbrush according to  claim 1 , wherein the TiO 2  is an anatase-type crystal.  
     
     
         3 . An electronic brush comprising; 
 a brush head portion having a bristle portion;    an n-type semiconductor which is formed of TiO 2  and receives external light; and    a battery which is a solar battery having an output of more than 0.5 V and less than 3.0 V, connected only to the n-type semiconductor such that the n-type semiconductor is connected to a negative pole of the solar battery, and superimposes an electrical potential on the n-type semiconductor in order to synergically enhance a photocatalytic effect of the n-type semiconductor.    
     
     
         4 . The electronic brush according to  claim 3 , wherein the TiO 2  is an anatase-type crystal.