Ultrasonic toothbrush

Abstract

The invention relates to an ultrasonic toothbrush which comprises a power supply with high-frequency oscillation signal output, a toothbrush body molded in an integral way, an ultrasonic generator sealed inside the head of the toothbrush body, and a lead which is extracted from the toothbrush body and used for connecting the ultrasonic generator and the power supply. The ultrasonic generator of the ultrasonic toothbrush comprises an ultrasonic transducer provided with double piezoelectric ceramic plates, has high power, and generates the phenomenon of ultrasonic cavitation in the oral cavity, thus realizing ultrasonic cleaning function. The ultrasonic toothbrush has simple and reliable structure and low cost, and is very suitable for families.

Description

technical field [0001] The invention relates to a toothbrush, in particular to an ultrasonic toothbrush with ultrasonic cleaning function. Background technique [0002] The principle of ultrasonic cleaning can be explained by the phenomenon of "cavitation". The so-called cavitation is the formation of cavities in the liquid and the rapid closure of the cavities. The peak value can reach vacuum or negative pressure, but in fact there is no negative pressure, so a large pressure is generated in the liquid, which will tear the liquid into a cavity, and the cavity will rupture when the ultrasonic pressure reverses to the maximum. The strong shock wave generated can knock down the dirt attached to the object. Only when the liquid pressure in a certain area is lower than the gas pressure in the bubble will cavitation occur in this area, so this condition can only be met when the ultrasonic amplitude is large enough. The minimum power required to produce cavitation is known as th...

AI Technical Summary

Problems solved by technology

[0004] Its power supply, oscillating circuit and ultrasonic generating device of the ultrasonic toothbrush of prior art are all arranged in the toothbrush main body, and power supply generally adopts battery or rechargeable battery, and ultrasonic generator generally adopts piezoelectric ceramic sheet, and the ultrasonic frequency that this structure produces is high, The power density is small, it is difficult to reach the critical point of cavitation, and it is difficult to achieve ultrasonic cleaning

Such as a Chinese patent application (application number: CN200410021841.7) discloses the ultrasonic vibration toothbrush, the ultrasonic generator that adopts is ultrasonic tile, and vibration frequency is 1.6~2.4MHZ, and the power density of the ultrasonic wave that produces is only 10~ 100mW / cm 2 , cavitation cleaning cannot be realized at all, but the fluid vibration generated by ultrasonic vibration is used to clean teeth, and the cleaning function is limited

Another example is the ultrasonic toothbrush disclosed in another Chinese patent (patent number: ZL200820023178.8).

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