CN112890647A - Driving method of ultrasonic skin cleaning instrument - Google Patents
Driving method of ultrasonic skin cleaning instrument Download PDFInfo
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- CN112890647A CN112890647A CN201911229986.9A CN201911229986A CN112890647A CN 112890647 A CN112890647 A CN 112890647A CN 201911229986 A CN201911229986 A CN 201911229986A CN 112890647 A CN112890647 A CN 112890647A
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K7/00—Body washing or cleaning implements
- A47K7/04—Mechanical washing or cleaning devices, hand or mechanically, i.e. power operated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
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Abstract
The invention relates to a driving method of an ultrasonic skin cleaning instrument, wherein a driving circuit of the ultrasonic skin cleaning instrument outputs working frequency to drive an ultrasonic working head to generate high-frequency vibration, a control circuit of the driving circuit is internally preset with a working frequency section comprising at least two frequency points, and the control circuit controls the cyclic switching of the output working frequency among the frequency points of the working frequency section. The invention adopts the prior art that a plurality of frequency points are switched back and forth to output to drive the working head, and a fixed frequency drive is continuously output and a fixed frequency drive is discontinuously output, thereby greatly reducing the working noise of the ultrasonic skin cleaner under the condition of ensuring that the working head has enough ultrasonic intensity output. And the debugging is convenient during production, and the production efficiency is high.
Description
Technical Field
The invention relates to the technical field of beauty treatment, in particular to a technology for cleaning skin by utilizing ultrasonic waves.
Background
The ultrasonic skin cleaning instrument utilizes an electronic high-frequency oscillation method to cause high-frequency resonance of a piezoelectric ceramic transducer to generate ultrasonic waves, the piezoelectric ceramic and a metal piece are jointed to form a working head of the ultrasonic skin cleaning instrument, ultrasonic energy is contacted with the skin of a person through the surface of the metal piece of the working head to act on the skin of the person, and the ultrasonic skin cleaning instrument can play a role in cleaning the skin and dirt in pores. Ultrasonic wave clean skin appearance is commonly used to have two kinds of high frequency oscillation modes of thickness direction (for example cosmetic instruments such as frequency 1MHz and 3MHz are vibration from top to bottom, clean to the skin degree of depth) and radial direction (for example hair cave clean skin appearance such as frequency 20KHz ~50KHz is surface deformation vibration, clean to the skin top layer). For example, the currently commonly used skin cleaning instrument (working head frequency is 20 KHz-50 KHz), also called a skin scraper, has the driving principle that a driving circuit intermittently outputs a fixed frequency to drive piezoelectric ceramic to vibrate, and the intermittent output is to avoid that the whole machine generates uncomfortable sharp sound caused by continuously outputting a fixed frequency. However, intermittent delivery also causes loud noises and can still be uncomfortable for the user, especially in facial use.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a driving method of an ultrasonic skin cleaning instrument, which can reduce the working noise of the ultrasonic skin cleaning instrument on the premise of ensuring that the working head of the ultrasonic skin cleaning instrument has enough ultrasonic intensity, aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps:
a driving method of an ultrasonic skin cleaning instrument comprises the steps that a driving circuit of the ultrasonic skin cleaning instrument outputs working frequency to drive an ultrasonic working head to generate high-frequency vibration, a working frequency section comprising at least two frequency points is preset in a control circuit of the driving circuit, and the control circuit controls the output working frequency to be switched circularly among the frequency points of the working frequency section.
Further:
the maximum frequency point and the minimum frequency point in the working frequency section have a difference of not more than 2 KHz.
When the working frequency section comprises more than two frequency points, the control circuit controls the switching output from the current frequency point to another frequency point which has the smallest difference with the current frequency point in the working frequency section.
The output duration at any one frequency point is no more than 20 milliseconds each time.
At least two working frequency sections are preset in the control circuit, and in the production process of the ultrasonic skin cleaning instrument, the optimal working frequency section is selected and locked as the working frequency section actually used by the ultrasonic skin cleaning instrument according to the matching condition of the ultrasonic working head and the driving circuit.
The frequency values of the plurality of frequency points are within the range of 21 KHz-27 KHz.
When the ultrasonic skin cleaning instrument works, the voltage and current detection circuit of the control circuit monitors the voltage and current values output by the driving circuit in real time, and the control circuit compares the voltage and current values monitored by the voltage and current detection circuit with a preset value to determine whether a compensation mechanism is started or not.
The method for selecting and locking the optimal working frequency section as the working frequency section for the practical use of the ultrasonic skin cleaning instrument comprises the following steps:
➀ mounting the drive circuit board on the test frame, and making the drive circuit enter the test mode by the mode conversion switch;
➁ calling switch by the main frequency program to drive circuit to enter 24KHz or 28KHz main frequency program;
➂ selecting four small frequency bands by two small frequency band selection switches;
➃ testing each small frequency section of the current main frequency program of the drive circuit, selecting the small frequency section which can make the ultrasonic working head output ultrasonic wave with enough intensity and has the smallest noise as the optimal working frequency section;
➄ pressing the select frequency band confirm key locks the optimum operating frequency band to the actual operating frequency band.
The invention adopts the prior art that a plurality of frequency points are switched back and forth to output to drive the working head, and a fixed frequency drive is continuously output and a fixed frequency drive is discontinuously output, thereby greatly reducing the working noise of the ultrasonic skin cleaner under the condition of ensuring that the working head has enough ultrasonic intensity output. And the debugging is convenient during production, and the production efficiency is high.
Drawings
FIG. 1 is a schematic circuit diagram of the working head and the selectable working frequency section in the control circuit of the embodiment of the driving method of the ultrasonic skin cleaning device according to the present invention;
FIG. 2 is a flow chart of the working head and the selectable working frequency section in the control circuit for matching selection according to the embodiment of the driving method of the ultrasonic skin cleaning device;
fig. 3 is a frequency switching output workflow diagram of an embodiment of a driving method of the ultrasonic skin cleansing apparatus according to the present invention.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a driving circuit of an ultrasonic skin cleaning device includes a power circuit, an MCU control circuit, a power amplification circuit, a step-up transformer and an ultrasonic working head, wherein the power circuit and the power amplification circuit are respectively electrically connected to the control circuit, and the step-up transformer is electrically connected to the power amplification circuit. The power supply circuit comprises a charging circuit and a rechargeable battery circuit. In some embodiments, the rechargeable battery circuit is connected with the MCU control circuit through the boost circuit and the voltage stabilizing circuit. The step-up transformer is electrically connected with the ultrasonic working head.
Based on the driving method of the ultrasonic skin cleaning instrument, the driving circuit of the ultrasonic skin cleaning instrument outputs the working frequency to drive the ultrasonic working head to generate high-frequency vibration, the control circuit of the driving circuit is internally preset with the working frequency section comprising at least two frequency points, and the control circuit controls the cyclic switching of the output working frequency among the frequency points of the working frequency section.
Preferably, the frequency values of the plurality of frequency points are in the range of 21KHz to 27 KHz. The maximum frequency point and the minimum frequency point in the working frequency section have a difference of not more than 2 KHz. When the working frequency section comprises more than two frequency points, the control circuit controls the switching output from the current frequency point to another frequency point which has the smallest difference with the current frequency point in the working frequency section. And the output duration at any one frequency point is no more than 20 milliseconds each time.
When the ultrasonic skin cleaning instrument works, the voltage and current detection circuit of the control circuit monitors the voltage and current values output by the driving circuit in real time, and the control circuit compares the voltage and current values monitored by the voltage and current detection circuit with a preset value to determine whether a compensation mechanism is started or not.
At least two working frequency sections are preset in the control circuit, and in the production process of the ultrasonic skin cleaning instrument, the optimal working frequency section is selected and locked as the working frequency section actually used by the ultrasonic skin cleaning instrument according to the matching condition of the ultrasonic working head and the driving circuit. Specifically, because the ultrasonic working heads cannot be completely consistent in batch production, in the production process, according to the actual matching conditions of different working heads and driving circuits, the selectable working frequency section which can enable the working heads to output ultrasonic waves with sufficient intensity and has the minimum noise is selected, and the selected working frequency section is locked as the working frequency section which is actually used by the ultrasonic skin cleaning instrument.
As shown in fig. 1, a driving circuit of an ultrasonic skin cleaning device is composed of a charging circuit, a rechargeable battery circuit, a booster circuit, a voltage stabilizing circuit, an MCU control circuit, a power amplifying circuit, a booster transformer and a voltage and current detecting circuit, wherein the booster transformer is connected to an ultrasonic working head. The MCU is provided with an I/O port (P5) as a test and working mode conversion monitoring port, and is controlled by an external toggle switch K, wherein the K is normally opened to be a working mode (high level) and closed to be a test mode (low level). The MCU also stores two main current main frequency bands (24 KHz and 28 KHz) of the skin cleaning instrument for directly switching and selecting during testing, and the high-low level (1/0) method (external toggle switch K1) of an I/O port (P1) of the MCU is used for switching the main frequency band programs during testing, for example, the MCU sets the high level (1) as the 28KHz main frequency band and the low level (0) as the 24KHZ main frequency band; if the MCU 24KHz main frequency program is called for use during testing, the external switch K1 of the I/O port P1 is closed (0) (controlled by the external fluctuation switch K1 of the test frame), the port is at low level, and the MCU enters a 24KHz main frequency program debugging mode.
The two large frequency bands are respectively subdivided into a plurality of groups of small frequency bands, and a plurality of working frequency points are prestored in each group of small frequency bands. If the MCU stores 4 optional working frequency bands in the 24KHz main frequency band, respectively, frequency band 1 (containing 4 frequency points of 23.5KHz, 23.7KHz, 23.9KHz, 24.1 KHz), frequency band 2 (6 frequency points of 23.9KHz, 24.1KHz, 24.3KHz, 24.5KHz, 24.7KHz, 24.9 KHz), frequency band 3 (6 frequency points of 24.7KHz, 24.9KHz, 25.1KHz, 25.3KHz, 25.5KHz, 25.7 KHz), frequency band 4 (6 frequency points of 25.5KHz, 25.7KHz, 25.9KHz, 26.1KHz, 26.3KHz, 26.5 KHz). MCU has stored 4 optional operating frequency section in 28KHz dominant frequency band, be frequency section 1 (contain 26.3KHz, 26.5KHz, 26.7KHz, 26.9KHz, 27.1KHz, totally 6 frequency points of 27.3 KHz), frequency section 2 (27.1 KHz, 27.3KHz, 27.5KHz, 27.7KHz, 27.9KHz, totally 6 frequency points of 28.1 KHz), frequency section 3 (27.9 KHz, 28.1KHz, 28.3KHz, 28.5KHz, 28.7KHz, totally 6 frequency points of 28.9 KHz), frequency section 4 (28.9 KHz, 29.1KHz, 29.3KHz, 29.5KHz, 29.7KHz, totally 6 frequency points of 29.9 KHz).
As shown in fig. 1, the MCU combines 4 groups of small frequency band codes by using high and low level (1/0) values of two I/O ports (P2, P3), the P2/P3 port values are respectively controlled by K2/K3 external toggle switches, K2/K3 is a small frequency band group selection switch, normally open is 1 (high level), and closed is 0 (low level), each group of small frequency bands consists of a plurality of operating small frequency points; the I/O port values (high and low) controlled by K2/K3 respectively represent: 00 represents frequency segment 1, 01 represents frequency segment 2, 10 represents frequency segment 3, and 11 represents frequency segment 4.
As shown in fig. 1, the toggle switch K is a mode switch, and is normally open to a working mode (high level) and closed to a testing mode (low level). The tact switch S1 is an ON/OFF switch and is also a frequency band selection confirmation key. The toggle switch K1 is used for calling a change-over switch for a main frequency band 24 KHz/28 KHz program, and is normally opened to be in a 28KHz program test mode (high level) and closed to be in a 24KHz program test mode (low level). The specific flow of selecting the optimal working frequency band which can make the ultrasonic working head output ultrasonic waves with enough intensity and simultaneously has the minimum noise is shown in fig. 2. The method specifically comprises the following steps:
1. installing a test frame on the drive circuit board, selecting a mode switch, and closing K to be a test mode;
2. pressing the S1 switch to enter a test mode;
3. pressing a K1 switch to select a main frequency program, closing K1 to enter a 24KHz main frequency program, and normally opening K1 to be a 28KHz main frequency program;
4. the selection of four small frequency bands is carried out through the cooperation of K2 and K3 switches;
5. aiming at each small frequency segment, judging the optimal working frequency segment by visual inspection of water spraying effect, auditory noise and the like;
6. and (4) pressing down an S1 switch aiming at the optimal working frequency section, locking the optimal working frequency section as an actual working frequency section, and taking down the driving circuit board to finish selection.
For example, a 24KHz working head is to be tested and a frequency band 1 is selected to work (K2/K3 value is 00), and the specific process is as follows: firstly, K is closed, a power switch key (ON/OFF) of S1 is pressed to enter a test mode, then K1 is closed (low level), a 24KHz main frequency band program is entered, and then K2 (0)/K3 (0) is closed (at the moment, the value of K2/K3 is 00), so that each frequency point of the frequency band 1 is entered to switch back and forth to output work. If the frequency band 1 has poor effect, the frequency band 2 (01) can be used for testing, K2 (0) is kept in a closed state, and K3 (1) is changed into a normally open state, so that the frequency band 2 is tested. And so on, the test can be carried out by replacing the group 3 or the group 4. After finding the optimal working frequency band group, pressing an S1 key to turn off the power supply for confirmation, taking down the drive circuit board, automatically writing a confirmation working program into the FLASH by the MCU for use during working, and completing the test.
And in the production and assembly process of the ultrasonic skin cleaning instrument, one working frequency section of the 4 selectable working frequency sections is selected according to the actual matching effect of each working head and the MCU and is locked for use. For example, the frequency segment 2 is selected, as shown in fig. 3, the output frequency of the driving circuit will be switched to and fro in 6 frequency points of 23.9KHz, 24.1KHz, 24.3KHz, 24.5KHz, 24.7KHz and 24.9KHz in sequence, each frequency point has 10 milliseconds of working time, and the frequency output is continuous output. That is: 23.9KHz (working 10 ms) - -24.1 KHz (working 10 ms) - -24.3 KHz (working 10 ms) - -24.5 KHz (working 10 ms) - -24.7 KHz (working 10 ms) - -24.9 KHz (working 10 ms) - -24.7 KHz (working 10 ms) - -24.5 KHz (working 10 ms) - -24.3 KHz (working 10 ms) - -24.1 KHz (working 10 ms) - -23.9 KHz (working 10 ms) - -24.1 KHz (working 10 ms) …, and the output is circularly switched in sequence.
Judging whether the selected frequency section gear matching meets the product standard or not is mainly based on visual inspection, firstly, the atomization effect is tested by dripping water spray at the front end of the working head, secondly, the noise during working is heard, and whether the output current value of the power supply exceeds the specified value of the test standard or not is seen again.
The driving method of the ultrasonic skin cleaning instrument adopts a plurality of frequency points to switch output back and forth to drive the working head, thereby greatly reducing the sharp sound generated by continuously outputting a fixed frequency to the working head and the whole machine and the noise generated by discontinuously outputting a fixed frequency to the working head and the whole machine.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and such modifications and substitutions are intended to be included within the scope of the appended claims.
Claims (10)
1. A driving method of an ultrasonic skin cleaning instrument is characterized in that a driving circuit of the ultrasonic skin cleaning instrument outputs working frequency to drive an ultrasonic working head to generate high-frequency vibration, and the driving method is characterized in that: the control circuit of the driving circuit is internally preset with a working frequency section comprising at least two frequency points, and the control circuit controls the cyclic switching of the output working frequency among the frequency points of the working frequency section.
2. The driving method of the ultrasonic skin cleansing apparatus according to claim 1, characterized in that: the maximum frequency point and the minimum frequency point in the working frequency section have a difference of not more than 2 KHz.
3. The driving method of the ultrasonic skin cleansing apparatus according to claim 1, characterized in that: when the working frequency section comprises more than two frequency points, the control circuit controls the switching output from the current frequency point to another frequency point which has the smallest difference with the current frequency point in the working frequency section.
4. The driving method of the ultrasonic skin cleansing apparatus according to claim 1, characterized in that: the output duration at any one frequency point is no more than 20 milliseconds each time.
5. The driving method of the ultrasonic skin cleansing apparatus according to any one of claims 1 to 4, characterized in that: at least two working frequency sections are preset in the control circuit, and in the production process of the ultrasonic skin cleaning instrument, the optimal working frequency section is selected and locked as the working frequency section actually used by the ultrasonic skin cleaning instrument according to the matching condition of the ultrasonic working head and the driving circuit.
6. The driving method of the ultrasonic skin cleansing apparatus according to any one of claims 1 to 4, characterized in that: the frequency values of the plurality of frequency points are within the range of 21 KHz-27 KHz.
7. The driving method of the ultrasonic skin cleansing apparatus according to any one of claims 1 to 4, characterized in that: when the ultrasonic skin cleaning instrument works, the voltage and current detection circuit of the control circuit monitors the voltage and current values output by the driving circuit in real time, and the control circuit compares the voltage and current values monitored by the voltage and current detection circuit with a preset value to determine whether a compensation mechanism is started or not.
8. The driving method of the ultrasonic skin cleansing apparatus according to claim 5, characterized in that: the method for selecting and locking the optimal working frequency section as the working frequency section for the practical use of the ultrasonic skin cleaning instrument comprises the following steps:
➀ mounting the drive circuit board on the test frame, and making the drive circuit enter the test mode by the mode conversion switch;
➁ calling switch by the main frequency program to drive circuit to enter 24KHz or 28KHz main frequency program;
➂ selecting four small frequency bands by two small frequency band selection switches;
➃ testing each small frequency section of the current main frequency program of the drive circuit, selecting the small frequency section which can make the ultrasonic working head output ultrasonic wave with enough intensity and has the smallest noise as the optimal working frequency section;
➄ pressing the select frequency band confirm key locks the optimum operating frequency band to the actual operating frequency band.
9. A driving method of an ultrasonic skin cleaning instrument is characterized in that a driving circuit of the ultrasonic skin cleaning instrument outputs working frequency to drive an ultrasonic working head to generate high-frequency vibration, and the driving method is characterized in that: the control circuit of the driving circuit is internally preset with a working frequency section comprising at least two frequency points, and the control circuit controls the cyclic switching between the frequency points of the working frequency section to output the working frequency; the maximum frequency difference of the two or more frequency points is not more than 2 KHz; when the working frequency section comprises more than two frequency points, the control circuit controls the switching output from the current frequency point to another frequency point which has the smallest difference with the current frequency point in the working frequency section.
10. A driving method of an ultrasonic skin cleaning instrument is characterized in that a driving circuit of the ultrasonic skin cleaning instrument outputs working frequency to drive an ultrasonic working head to generate high-frequency vibration, and the driving method is characterized in that: the control circuit of the driving circuit is internally preset with a working frequency section comprising at least two frequency points, and the control circuit controls the cyclic switching between the frequency points of the working frequency section to output the working frequency; the maximum frequency difference of the two or more frequency points is not more than 2 KHz; when the working frequency section comprises more than two frequency points, the control circuit controls the current frequency point to be switched and output to another frequency point with the minimum difference with the current frequency point in the working frequency section; the output duration at any one frequency point is no more than 20 milliseconds each time.
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Application publication date: 20210604 |