Title:
LOW-NOISE SONIC ELECTRIC TOOTHBRUSH, AND SONIC ELECTRIC MOTOR DRIVING CIRCUIT AND METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/116337
Kind Code:
A1
Abstract:
A low-noise sonic electric toothbrush, and a sonic electric motor driving circuit and method therefor. The driving circuit comprises: a control single-chip microcomputer (1) for generating a control signal, wherein the control signal comprises a single-phase direct-current pulse signal having a predetermined duty cycle; a filtering circuit (2) connected to the control single-chip microcomputer (1), wherein the filtering circuit (2) is used for rectifying and filtering the control signal into an alternating-current control wave from which a high-frequency signal is filtered out; and a power amplification circuit (3) connected to the filtering circuit (2), wherein a sonic electric motor is connected to the power amplification circuit (3) and works under the control of the alternating-current control signal. Since a high-frequency signal is filtered out from a control signal by means of a filtering circuit (2), the sound is lower and more comfortable when a sonic electric motor runs, thereby improving the use experience of an electric toothbrush; during connection, only one IO interface of a control single-chip microcomputer (1) is needed in order to emit a control signal, thereby saving on IO interface resources of the control single chip microcomputer (1); and a circuit structure is simple, the cost is equivalent to that of an existing H bridge, and the implementation can be easily achieved.
Inventors:
CAI AIQIN (CN)
JIANG TINGMI (CN)
GUO FANMEI (CN)
JIANG TINGMI (CN)
GUO FANMEI (CN)
Application Number:
PCT/CN2020/141125
Publication Date:
June 09, 2022
Filing Date:
December 29, 2020
Export Citation:
Assignee:
SHANGHAI DIRECT TECH CO LTD (CN)
International Classes:
A61C17/20; A61C17/22
Foreign References:
| CN112716636A | 2021-04-30 | |||
| CN102263537A | 2011-11-30 | |||
| CN201639531U | 2010-11-17 | |||
| CN204597818U | 2015-08-26 | |||
| CN206603428U | 2017-11-03 | |||
| US20110041269A1 | 2011-02-24 |
Attorney, Agent or Firm:
SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)
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