WO2020151223A1

WO2020151223A1 - Sine wave drive control method for electric toothbrush

Info

Publication number: WO2020151223A1
Application number: PCT/CN2019/101001
Authority: WO
Inventors: 赵立群; 吕少波; 陈建群; 刘明
Original assignee: 广州皓醒湾科技有限公司
Priority date: 2019-01-25
Filing date: 2019-08-16
Publication date: 2020-07-30
Also published as: CN109512539A

Abstract

A sine wave drive control method for an electric toothbrush; an electric toothbrush is driven by a rotary motor, and the drive control method comprises the following steps: the electric toothbrush receiving a start-up command; the electric toothbrush outputting a first time drive command and inputting an acceleration signal to an output end, and the rotary motor rotating toward a first direction; the electric toothbrush outputting a second time drive command and inputting a deceleration signal to the output end, and the rotary motor rotating toward a second direction; ...; the electric toothbrush outputting an n-1th time drive command and inputting an acceleration signal to the output end, and the rotary motor rotating toward the first direction; the electric toothbrush outputting an nth time drive command and inputting a deceleration signal to the output end, and the rotary motor rotating toward the second direction; the attributes of the acceleration signal and the deceleration signal are opposite to each other, and the first direction is opposite to the second direction; a drive waveform of the rotary motor is a continuous sine wave or a rectangular pulse equivalent sine wave having an equal height and a different width. The present invention may significantly reduce the vibration of the body of the electric toothbrush and reduce noise.

Description

Sine wave drive control method for electric toothbrush

Cross references to related applications

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office on January 25, 2019, with the application number 2019100756933, titled "Sine Wave Drive Control Method for Electric Toothbrushes".

Technical field

The present disclosure relates to the field of electric toothbrushes, and in particular to a sine wave drive control method for electric toothbrushes.

Background technique

Through the rapid rotation or vibration of the motor, the electric toothbrush causes the brush head to produce high-frequency vibration, which instantly decomposes the toothpaste into fine foam and penetrates deep into the teeth for oral cleaning. The current electric toothbrushes are mainly driven by a sonic vibration motor, which passes through when the sonic vibration motor works. Alternately energize the motor in the forward and reverse directions at a certain frequency to make the motor oscillate in a reciprocating arc at a certain frequency. Existing electric toothbrushes have large vibrations and loud noises, which are not conducive to the user's tooth brushing experience. At the same time, they also increase the heating power of the electric toothbrush and shorten the standby time.

Summary of the invention

The purpose of the present disclosure includes, for example, providing a sine wave driving control method for an electric toothbrush, which can greatly reduce the vibration of the electric toothbrush body, reduce noise, reduce power consumption, and extend standby time.

The embodiments of the present disclosure are implemented as follows:

The embodiment of the present disclosure provides a sine wave drive control method for an electric toothbrush, the drive control method including the following steps:

The electric toothbrush receives the start instruction;

The electric toothbrush outputs the first drive command, inputs an acceleration signal to the output terminal, and the rotating motor rotates in the first direction;

The electric toothbrush outputs the second driving command, inputs a deceleration signal to the output terminal, and the rotating motor rotates in the second direction;

...

The electric toothbrush outputs the n-1th drive command, inputs an acceleration signal to the output terminal, and the rotating motor rotates in the first direction;

The electric toothbrush outputs the nth drive command, inputs a deceleration signal to the output terminal, and the rotating motor rotates in the second direction;

Among them, the attributes of the acceleration signal and the deceleration signal are opposite, and the first direction is opposite to the second direction.

Optionally, the value of n is an integer greater than or equal to 2.

Optionally, the driving waveform of the rotating electric machine is a continuous sine wave.

Optionally, the driving waveform of the rotating electric machine is a rectangular pulse equivalent sine wave of equal height and unequal width.

Optionally, the rectangular pulse equivalent sine wave of a half period includes 2a rectangular pulses.

Optionally, the half-period equivalent sine wave of the rectangular pulse includes [2-18] rectangular pulses.

Optionally, the half-period equivalent sine wave of the rectangular pulse includes [2-10] rectangular pulses.

Optionally, the rectangular pulse equivalent sine wave of a half period includes [10-18] rectangular pulses.

Optionally, the rectangular pulse equivalent sine wave of a half period includes 10 rectangular pulses.

Optionally, the widths of the five rectangular pulses located on one side of the symmetry center are respectively 0.01225 times, 0.03550 times, 0.05525 times, 0.06975 times, and 0.09750 times of an equivalent sine wave period.

Optionally, the 2a rectangular pulses are arranged symmetrically with respect to their centers.

Optionally, the width of the rectangular pulse close to the center of symmetry is greater than the width of the rectangular pulse far from the center of symmetry.

Optionally, the rotating electric machine drives the rotating electric machine with the maximum value of the sine wave or equivalent sine wave as [1.40-1.42] times the square wave when it is driven by the square wave.

Optionally, the rotating electric machine is driven by its square wave

Double as the maximum value of the sine wave drives the rotating electric machine.

Optionally, the rotating electric machine is driven by its square wave

It should be noted:

The aforementioned "first, second, third", etc. are only used to distinguish names, and do not represent specific quantities and sequences.

The advantages or principles of the present disclosure are described below:

1. The electric toothbrush outputs an acceleration signal, and the rotating motor accelerates and rotates in the first direction according to the acceleration signal. When the rotating motor accelerates in the first direction, the electric toothbrush outputs a deceleration signal, and the rotating motor rotates in the second direction. The movement track matches the driving waveform of the rotating motor, which can greatly reduce the vibration of the body of the electric toothbrush, thereby reducing noise, reducing power consumption and extending standby time.

2. The rotating motor completes the process of acceleration and deceleration in half a cycle. The movement of the rotating motor becomes two steps, which doubles the distance brushed by one movement of the brush head and greatly improves the cleaning ability.

3. The rotating motor is driven by a sine wave or the equivalent sine wave of rectangular pulses of equal height and unequal width, which will not generate high-order harmonics, and the rotating motor has higher operating efficiency and more stable operation.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative work.

Fig. 1 is a schematic diagram of the equivalent sine wave of rectangular pulses with equal height and unequal width for half period of the present disclosure;

Fig. 2 is a schematic diagram of a rectangular pulse equivalent to a sine wave of a rectangular pulse of equal height and unequal width in half a period of the present disclosure.

detailed description

In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of the embodiments of the present disclosure, but not all the embodiments. The components of the embodiments of the present disclosure generally described and illustrated in the drawings herein may be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but merely represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

In the description of the present disclosure, it should be noted that if the position or positional relationship indicated by the term "center" appears, it is based on the position or positional relationship shown in the drawings, or is the position or position that the product of the invention is usually placed in use. The positional relationship is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

In addition, if the terms "first", "second", "third", etc. appear, they are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should also be noted that, unless otherwise clearly defined and limited, if the term "setting" appears, it should be understood in a broad sense. For those of ordinary skill in the art, the above terms can be understood in specific situations. Specific meaning in this disclosure.

It should be noted that the features in the present disclosure can be combined with each other if there is no conflict.

The present disclosure provides a sine wave drive control method for an electric toothbrush. The drive control method includes the following steps:

The electric toothbrush receives the start instruction;

The electric toothbrush outputs the first driving command, and the acceleration signal is input to the output terminal, and the rotating motor rotates in the first direction; in other words, after the electric toothbrush is started, the electric toothbrush outputs the first driving command to the rotating motor, and the rotating motor is based on the first driving command. One drive command accelerates the rotation in the first direction, thereby driving the brush head to vibrate;

The electric toothbrush outputs the second driving command, and the deceleration signal is input to the output terminal, and the rotating motor rotates in the second direction; in other words, after the rotating motor completes the acceleration rotation in the first direction, the electric toothbrush outputs the second driving command to rotate Motor, the rotating motor decelerates and rotates in the second direction according to the second drive command, thereby driving the brush head to vibrate;

...

Among them, the attributes of the acceleration signal and the deceleration signal are opposite. The first direction is opposite to the second direction. The rotating motor first moves in the first direction and then in the second direction. The motion trajectory of the rotating motor is divided into the first direction and the second direction. Two directions, the first direction is the positive direction, and the second direction is the opposite direction opposite to the first direction. It should be understood that in the present disclosure, the value range of n is an integer greater than or equal to 2.

The driving waveform of the rotating electric machine of the present disclosure is a continuous sine wave; the rotating electric machine can drive the rotating electric machine with [1.40-1.42] times the square wave when the square wave is driven as the maximum value of the sine wave. For example, the rotating electric machine can be driven with The maximum value of the sine wave is 1.40 times the square wave when the square wave is driven to drive the rotating electric machine; or, the rotating electric machine can be driven by the square wave when the square wave is driven.

The double as the maximum value of the sine wave drives the rotating electric machine; or, the rotating electric machine may drive the rotating electric machine with 1.42 times the square wave when the square wave is driven as the maximum value of the sine wave. It should be understood that the rotating electric machine can be driven by its square wave

Times as the maximum value of the sine wave to drive the rotating electric machine; alternatively, the rotating electric machine can be driven by the square wave of the square wave

As shown in Fig. 1 and Fig. 2, the driving waveform of the rotating electric machine of the present disclosure can also be equivalent to a sine wave with rectangular pulses of equal height and unequal width. In the present disclosure, a rectangular pulse equivalent sine wave of half a period includes 2a rectangular For the pulse, 2a rectangular pulses are arranged symmetrically with respect to the center. At the same time, the width of the rectangular pulse near the center of symmetry is larger than the width of the rectangular pulse far from the center of symmetry. Among them, the value range of a is an integer greater than zero.

For example, in the present disclosure, the rectangular pulse equivalent sine wave of a half period includes [2-18] rectangular pulses, and optionally, the rectangular pulse equivalent sine wave of a half period includes 2 rectangular pulses; or, half The periodic rectangular pulse equivalent sine wave includes 10 rectangular pulses; or, the half-period rectangular pulse equivalent sine wave includes 18 rectangular pulses. It should be understood that, optionally, the rectangular pulse equivalent sine wave of a half period includes [2-10] rectangular pulses; or, the rectangular pulse equivalent sine wave of a half period includes [10-18] rectangular pulses.

In the present disclosure, when the equivalent sine wave of a half-period rectangular pulse includes 10 rectangular pulses, the widths of the five rectangular pulses located on the side of the center of symmetry, that is, the widths of the rectangular pulses in a quarter of the period are:

T1=(COS0°-COS18°)*0.25T=0.049T*0.25=0.01225T

T2=(COS18°-COS36°)*0.25T＝0.142T*0.25＝0.03550T

T3=(COS36°-COS54°)*0.25T=0.221T*0.25=0.05525T

T4=(COS54°-COS72°)*0.25T=0.279T*0.25=0.06975T

T5=(COS72°-COS90°)*0.25T＝0.309T*0.25＝0.09750T

Among them, T is an equivalent sine wave period, T1 is the first rectangular pulse, T2 is the second rectangular pulse, T3 is the third rectangular pulse, T4 is the fourth rectangular pulse, T5 is the fifth rectangular pulse . It should be noted that T1 is the rectangular pulse farthest from the center of symmetry, and T2, T3, T4, and T5 are arranged in the direction from T1 to the center of symmetry.

The advantages or principles of the present disclosure are described below:

1. The electric toothbrush outputs an acceleration signal, and the rotating motor accelerates and rotates in the first direction according to the acceleration signal. When the rotating motor accelerates in the first direction, the electric toothbrush outputs a deceleration signal, and the rotating motor decelerates in the second direction according to the deceleration signal Rotation, the trajectory of the rotating motor matches the driving waveform of the rotating motor, which can greatly reduce the vibration of the body of the electric toothbrush, thereby reducing noise, reducing power consumption, and extending standby time.

The foregoing descriptions are only preferred embodiments of the present disclosure, and are not used to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Industrial applicability:

In summary, the present disclosure provides a sine wave drive control method for an electric toothbrush, which can reduce body vibration, reduce noise, reduce power consumption, and extend standby time.

Claims

A sine wave driving control method for an electric toothbrush, the electric toothbrush is driven by a rotating motor, characterized in that the driving control method includes the following steps:

The electric toothbrush receives the start instruction;

The electric toothbrush outputs the first drive command, inputs an acceleration signal to the output terminal, and the rotating motor rotates in the first direction;

The electric toothbrush outputs the second driving command, inputs a deceleration signal to the output terminal, and the rotating motor rotates in the second direction;

...

The electric toothbrush outputs the n-1th drive command, inputs an acceleration signal to the output terminal, and the rotating motor rotates in the first direction;

The electric toothbrush outputs the nth drive command, inputs a deceleration signal to the output terminal, and the rotating motor rotates in the second direction;

Among them, the attributes of the acceleration signal and the deceleration signal are opposite, and the first direction is opposite to the second direction.
The sine wave drive control method of an electric toothbrush according to claim 1, wherein the value of n is an integer greater than or equal to 2.
The sine wave driving control method of an electric toothbrush according to claim 1, wherein the driving waveform of the rotating motor is a continuous sine wave.
The sine wave drive control method of an electric toothbrush according to claim 1, wherein the drive waveform of the rotating electric machine is a rectangular pulse equivalent sine wave of equal height and unequal width.
The sine wave drive control method of an electric toothbrush according to claim 4, wherein the rectangular pulse equivalent sine wave of a half cycle includes 2a rectangular pulses, wherein the value of a is an integer greater than zero.
The sine wave drive control method of an electric toothbrush according to claim 5, wherein the rectangular pulse equivalent sine wave of a half cycle includes [2-18] rectangular pulses.
The sine wave drive control method of an electric toothbrush according to any one of claims 5 or 6, wherein the rectangular pulse equivalent sine wave of a half cycle includes [2-10] rectangular pulses.
The sine wave driving control method of an electric toothbrush according to any one of claims 5 or 6, wherein the rectangular pulse equivalent sine wave of a half cycle includes [10-18] rectangular pulses.
The sine wave driving control method of an electric toothbrush according to any one of claims 5-8, wherein the rectangular pulse equivalent sine wave of a half cycle includes 10 rectangular pulses.
The sine wave drive control method of an electric toothbrush according to claim 9, wherein the widths of the five rectangular pulses located on one side of the symmetry center are 0.01225 times, 0.03550 times, and 0.05525 times of an equivalent sine wave period. Times, 0.06975 times and 0.09750 times.
The sine wave drive control method of an electric toothbrush according to any one of claims 5-10, wherein the 2a rectangular pulses are symmetrically arranged with respect to the center thereof.
The sine wave driving control method of an electric toothbrush according to claim 11, wherein the width of the rectangular pulse near the center of symmetry is greater than the width of the rectangular pulse far from the center of symmetry.
The sine wave drive control method of an electric toothbrush according to any one of claims 1-12, wherein the rotating electric machine uses [1.40-1.42] times the square wave when it is driven as a sine wave or the like The maximum value of the effective sine wave drives the rotating motor.
The sine wave drive control method of an electric toothbrush according to claim 13, wherein the rotating electric machine is driven by the square wave when it is driven by the square wave.
Double as the maximum value of the sine wave drives the rotating electric machine.
The sine wave drive control method of an electric toothbrush according to claim 13, wherein the rotating electric machine is driven by the square wave when it is driven by the square wave.
Double as the maximum value of the sine wave drives the rotating electric machine.
The sine wave drive control method of an electric toothbrush according to any one of claims 13-15, wherein the rotating electric machine is driven by the square wave when it is driven by the square wave.
Double as the maximum value of the sine wave drives the rotating electric machine.