KR200332093Y1 - Ultra-sonic vibrator having the function of level and power regulation - Google Patents

Abstract

The present invention relates to an ultrasonic skin care device, the DC-DC converter 20 for boosting the charging power of the battery (1); An ultrasonic driver 50 for driving an ultrasonic element vibrating by the voltage boosted by the DC-DC converter; A switch unit 30 of the power switch and the operation switch; A display unit 40 displaying an operation state; And a CPU (2) for controlling the DC-DC converter unit, the skin care device driving unit, the switch unit, and the display unit, wherein the CPU is PWM by switching the intensity control operation switch (SW3) of the switch unit. Output the switching signal from the control terminal (terminal 10) to the DC-DC converter to adjust the intensity of the output voltage, and by switching the mode operation switch (SW2) of the switch unit to drive the drive signal of a different frequency for each mode The ultrasonic drive unit may be driven in various modes by outputting the ultrasonic drive unit.

Description

ULTRA-SONIC VIBRATOR HAVING THE FUNCTION OF LEVEL AND POWER REGULATION}

The present invention relates to an ultrasonic skin care device, and to an ultrasonic skin care device capable of controlling both strength and weakness while operating in various modes by frequency change.

In the case of a conventional general ultrasonic beauty device, it usually operates in various modes (cleaning mode, ultrasonic vibration mode, skin stability mode). And if the ultrasonic beauty device further has an ion implantation function, the iontophoresis mode is added thereto.

However, these conventional ultrasonic beauty devices have only a change in frequency and have no change in level because they do not bring about a change in strength or weakness of the operating voltage.

The present invention is to solve the conventional problems as described above, and to provide an ultrasonic beauty device having a function of controlling the strength of the voltage in addition to the mode change by the frequency change.

In addition, in the intensity control, to solve this in software without using a DC-DC converter chip, and to provide a supersonic beauty device that can further control the voltage intensity.

Another object of the present invention is to determine whether the surface of the ultrasonic device is in contact with the skin to adjust the output from the drug to the steel in the case of actual use, and conversely, when detecting the overheating of a specific part, the power consumption by adjusting the power to the drug It is also intended to reduce and prevent device stability or skin burns.

1 is a block diagram of the ultrasonic skin care device according to the present invention.

Figure 2 is a detailed circuit diagram of the power supply and switch of the skin care device according to the present invention.

Figure 3 is a detailed circuit diagram of the output of the skin care device according to the present invention.

Figure 4 is a detailed circuit diagram of the temperature sensing unit of the skin care device according to the present invention.

5 is a detailed circuit diagram of the ultrasonic drive unit of the skin care device according to the present invention.

Figure 6 shows a pulse waveform for the ultrasonic drive of the skin care device according to the present invention of FIG.

7 shows a pulse waveform for voltage control of the skin care device according to the present invention of FIG.

8 is a flowchart showing a control flow for stable voltage control according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: battery 2: CPU

10: voltage measuring unit 20: DC-DC converter

30; Switch unit 31: the first switch unit

32: second switch 40: display unit

50: ultrasonic drive unit 51: voltage amplifier

52: vibrator 53: resonator

54: oscillation unit 60: body detection unit

61: current sensing unit 62: amplifying unit

70; Temperature Sensing Unit 71: First Temperature Sensing Unit

72: second temperature detection unit 80: signal sound generating unit

90: auxiliary circuit section 91: reference voltage generator

92 reset unit

Ultrasonic skin care device according to the first aspect of the present invention for achieving the above object of the present invention, the DC-DC converter unit 20 for boosting the charging power of the battery (1); An ultrasonic driver 50 for driving an ultrasonic element vibrating by the voltage boosted by the DC-DC converter; A switch unit 30 of the power switch and the operation switch; A display unit 40 displaying an operation state; And a CPU (2) for controlling the DC-DC converter unit, the skin care device driving unit, the switch unit, and the display unit, wherein the CPU is PWM by switching the intensity control operation switch (SW3) of the switch unit. Output the switching signal from the control terminal (terminal 10) to the DC-DC converter to adjust the intensity of the output voltage, and by switching the mode operation switch (SW2) of the switch unit to drive the drive signal of a different frequency for each mode The ultrasonic drive unit may be driven in various modes by outputting the ultrasonic drive unit.

Preferably, the DC-DC converter comprises an output voltage measuring unit (R2, R3) for measuring the output voltage value and a switching element (D3) for switching by the PWM control signal from the CPU, The switching element D3 is turned on / off by a switching signal having an appropriate duty ratio output from the PWM control terminal so that the voltage can be boosted in software.

More preferably, the skin care device drive unit has a body detecting unit 60 to automatically adjust the output from the drug to the steel when the surface of the ultrasonic device detects contact with the skin,

The device has a temperature sensing unit 70 for sensing the temperature of a specific site, characterized in that the output is automatically adjusted to weak in the river when the specific site is overheated.

At this time, the temperature sensing unit, the first temperature sensing unit 71 for sensing the surface temperature of the skin diaphragm of the ultrasonic device, and the second temperature sensing unit 72 for sensing the temperature of the switching elements of the oscillator 54 of the ultrasonic drive unit. Is most preferred.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention in detail.

1 is an overall block diagram of the ultrasonic skin care device according to the present invention, Figure 2 is a detailed circuit diagram of the power supply and switching unit of the skin care device according to the present invention, Figure 3 is a detailed circuit diagram of the output unit of the skin care device according to the present invention, Figure 4 is a detailed circuit diagram of the temperature sensing unit of the skin care device according to the present invention, Figure 5 is a detailed circuit diagram of the ultrasonic drive unit of the skin care device according to the present invention.

In addition, Figure 6 shows a pulse waveform for the ultrasonic drive of the skin care device according to the present invention of Figure 5, Figure 7 shows a pulse waveform for voltage control of the skin care device according to the present invention of FIG.

First, as shown in FIG. 1, the charging power of the battery is boosted by the DC-DC converter 20 to drive the CPU 2, which in turn drives an ultrasonic element to a multi-level level by a pulse width change. 50 and the body detecting unit 60 for detecting whether the user's body is in contact with the ultrasonic device, the temperature detecting unit 70 for detecting an overheating state of the device, the switch unit 30 of the power switch and the operation switch , The display unit 40 for displaying the operation state, the signal sound generation unit 80 and the other auxiliary circuit unit 90 for warning the abnormal operation state as a beep. Meanwhile, in order to precisely control the voltage and reduce power consumption, the battery voltage measuring unit 10 having a battery remaining amount and having a battery protection circuit is connected to the battery.

Now, referring to FIG. 2, the switch unit 30 of the first switch unit 31 and the second switch unit 32, the DC-DC converter unit 20, and the reference voltage generator 91 and the reset unit ( The power supply section including the auxiliary circuit section 90 of FIG. 92 will be described in more detail.

As for the input terminal of the 1st switch part 31, the charging terminals J1 and J2 and the battery terminal J3 connected to an external power supply are connected in parallel. Another battery terminal J4 is not required, but it is assumed that the pole of the battery terminal is changed.

When the power switch SW1 is 'on', the switch-in (SW_IN) signal is input to the analog input terminal AN5 of the CPU 2 through the second switch unit 32 to activate the CPU. Then, the CPU activates the first switch unit 31 through the analog output terminal AN7, and operates the photocoupler ISO1 through the resistor R16 to switch the FET D4 so that the battery power is supplied to the DC-DC converter. To (20).

In this case, the battery voltage is measured by the battery voltage measuring unit 10 including the divided resistors R1 and R35 and input to the analog input terminal AN1 of the CPU.

On the other hand, since portable beauty devices usually use a battery of a single input power supply (for example, 3.6V), in some cases, boosting the voltage to a high voltage (10-15V for an ultrasonic device and 20-30V for an ion introducer, for example) Although the process is essential, the DC-DC converter unit 20 for this purpose has previously used an expensive chip, but in the present invention, as shown in FIG. 2, the output voltage is adjusted by adjusting a frequency duty rate. Is achieved by the PWM control program of the switching element D3 and the CPU.

That is, when the switching signal is output from the PWM control terminal (terminal 10) of the CPU, the switching element D3 is turned on / off to control the pulse width, thereby making it possible to control the power of the output voltage. That is, when the user wants to use the beauty device, when turning on the power and facing the skin, when using the device to the body by the body detection unit 60 to be described later, by increasing the 'switch-on' time interval of the PWM control signal In this case, the power supply is stepped up to the target voltage during use. This is achieved by using a feedback control method, as shown in (a) of FIG. 7, so that problems of the related arts such as system down due to sudden voltage rise are solved. In addition, step down also eliminates the problems caused by sudden voltage drops, as shown in FIG. 7B, by gradually decreasing the pulse width. As a result, stable power management is possible.

In fact, VDD, the output voltage of DC-DC converter, can output 12-15V when using beauty equipment, and power consumption can be reduced by keeping power supply about 10V when not in use.

The divider resistors R2 and R3 sense the output voltage to sense the output voltage sensed by the analog input terminal AN2 to match the voltage of the CPU (eg, 3.3V).

A power management program of the CPU for implementing the above operation will be described with reference to FIG. 8 is a flowchart showing a control flow for stable voltage control according to the present invention.

First, as shown in FIG. 8, when the pulse width check program PWM_CHECK is started (S1), 'PWM OK FLAG' is checked to check whether PWM control operates by a desired set value (S2). If it works as you want ('PWM OK FLAG' = 1), return to step S9 and continue. Otherwise, compare the PWM set point ('PWM_TARGET') with the actual PWM value ('PWM_PUF'). (S3), if the value is the same ('PWM_PUF'-'PWM_TARGET' = 0), the process returns to step S9 to continue, otherwise the PWM control steps S4 to S8 are performed.

First, it is examined whether the carry value is 0 (S4), in order to examine whether the duty ratio of the pulse width is larger than the set value. If the set value is smaller than the measured value, the PWM setting is performed (S5) and the PWM value actually applied is increased by a predetermined value to increase the duty ratio (S7). Conversely, if the set value is larger than the measured value, the PWM setting is performed (S6) and the PWM value actually applied is reduced by a predetermined value to reduce the duty ratio (S8).

After that, the process returns to the step S2 to continue the program.

On the other hand, the above-described programmed power adjustment method and apparatus, can also be used to adjust the output intensity of the beauty device. That is, when the user intentionally adjusts the output from 'weak' to 'strong' by adjusting the third switch SW3, which is the intensity control switching, the analog input terminal AN5 accepts this and inputs the PWM control terminal (pin 10). By applying a PWM pulse width adjustment signal, the duty ratio can be increased to allow the output to be 'strong'. For example, if you want to use the skin care device on the skin of sensitive areas such as the face, you need to weaken the output. On the contrary, if you want to use it on the hip or calf, it is better to increase the output.

The second switch SW2 of the second switch unit 32 is a mode switch for adjusting the step of the beauty device. As shown in FIG. 6, frequency conversion is performed on pulses of the output signal of the analog output terminal RA0 of the ultrasonic driver 50 of FIG. 5 to be described later so that an appropriate signal is output at each step according to each step. For example, the ultrasonic beauty device of the present invention is capable of adjusting the strength and intensity (H / L) of four stages according to the frequency conversion and two stages according to the voltage change.

On the other hand, by configuring as the second switch unit, it is possible to accept various voltages with one input port. Reference numeral 91 is a reference voltage generator, 92 is a reset unit, L1 is a reactor, C2 and C3 are capacitors, and D1 and D2 are anti-reversal diodes.

Now, with reference to Figure 5 will be described in detail with respect to the ultrasonic drive unit 50 is the core of the present invention.

Now, when the control signal oscillated at the appropriate frequency by the CPU as described above is output to the voltage amplifier 51 of the ultrasonic drive unit through the analog output terminal RA0, the voltage amplifiers R15, Q4, Q5, R8, R9, After the amplification at D10), it is input to the ultrasonic vibrator ULTRA1 which is a piezoelectric element of the vibrator 52 through the resonator 53. That is, when a pulse is applied to the vibrator, the free vibration is performed, and the power is well transmitted, so that resonance occurs well, thereby causing self-resonant oscillation to the transistor Q2 called a resonance tank. This causes the phase in the transformer T1 to be amplified from the zero potential to the + side, and is oscillated by the oscillation switching elements Q3 and Q6 of the oscillation unit 54, and again through the transformer T2 of the oscillator 52 again, an ultrasonic vibrator Power is applied to ULTRA1 to cause resonance.

On the other hand, for example, the vibrator starts to vibrate at a frequency of 1 MHz, when the vibrator is placed on the user's skin, the vibrator is pressed, which in turn operates in the direction of suppressing vibration, resulting in a difference in current This is detected by the voltage dividing resistors R18 and R20 of the current sensing unit 61. The weak sensed signal is amplified by the amplifier 62 and input to the analog input terminal AN6 of the CPU to be digitally converted, and finally output to the PWM output terminal (No. 10 pin) to the DC-DC converter unit 20 of the CPU. This increases the duty ratio of the signal. Thus, by stepping up the voltage from the 'low' (weak) level to the 'high' (strong) level, the vibrator still vibrates the same ultrasonically even if the vibrator is pressed against the skin so that it does not interfere with operation as a skin care device. By doing this, it is possible to reduce unnecessary power consumption by vibrating ultrasonic waves at a 'low' level while the user is not actually using the device even when the power is turned on.

Next, the configuration of the signal output unit of the display unit 40 and the beep generator 80 of the present invention will be described with reference to FIG. 3. The photodiodes D6 and D7 displaying strength and weakness control are two ports in parallel. Photodiodes D8 and D9 connected to RB2 and RB3 and indicating mode adjustment of the first mode and the second mode are connected to two ports RB3 and RC0 in parallel, and mode adjustment of the third mode and the fourth mode. The photodiodes D11 and D13, which are connected to the two ports RC0 and RC1 in parallel, and the photodiodes D14, which indicate the user's usage status, are connected to the two ports RB2 and RC1 at both ends. By emitting multiple photodiodes at the port terminals, it is possible to reduce the total number of pins on the CPU, which in turn can lead to cost savings.

The alarm sound generating units R5, Q1, and BUZ1 of the member No. 80 are operation circuits of the buzzer BUZ1 for generating an alarm sound to indicate the case of an abnormal state or the use state as a sound.

The truth table for determining whether each LED emits light is shown in Table 1. For example, when the output of the input / output terminal RB2 (A) is '0' and the output of the input / output terminal RB3 (B) is '1', the LED (D7) indicating the current intensity adjustment step is 'high' is emitted. When the output of input / output terminal RB3 (B) is '0' and the output of input / output terminal RC0 (C) is '1', LED (D8) indicating the current ultrasonic mode 'level 1' is emitted. When the output of RC0 (C) is '0' and the output of the input / output terminal RC1 (D) is '1', the LED (D13) indicating the current ultrasonic wave mode 'Level 4' is emitted, and the input / output terminal RB2 (A When the output of 1) is '1' and the output of the input / output terminal RC1 (D) is '0', the rear indicator LED D14 indicating that the ultrasonic driver is currently operating on the skin may be configured to emit light.

Finally, the temperature sensing unit 70 of the present invention will be described with reference to FIG. 4. First, the first temperature sensing unit 71 is composed of a thermistor RT1 and a voltage dividing resistor R19, and is input to the CPU through the analog input terminal AN3. The surface temperature of the skin diaphragm of the ultrasonic vibrator of FIG. 5 to be described later is sensed, and as the ultrasonic vibrator is operated, the diaphragm is heated, thereby detecting an overheating at a predetermined temperature (for example, 45 °) or more, adversely affecting the skin. In order to prevent further overheating, the PWM control is automatically performed to reduce the duty ratio of the pulse wave input to the DC-DC converter to adjust the strength and weakness of the voltage.

In addition, the thermistor RT2 and the voltage dividing resistor R36 of the second temperature sensing unit 72 sense the temperature of the oscillation transistors Q3 and Q6 of the oscillation unit 54 of the ultrasonic driving unit of FIG. Also, if the temperature of the transistor is overheated by a predetermined value or more, the duty ratio of the PWM control signal is reduced to protect the circuit. The weak sensing signal passes through the amplifier circuits R37, R38, and U2A and is input to the analog input terminal AN4.

As described above in detail, according to the ultrasonic skin care device according to the present invention, it is possible to operate the ultrasonic beauty device in various modes and levels, to reduce unnecessary power consumption, and to prevent burns due to skin overheating. To increase the stability.

The above is merely described based on one embodiment of the present invention, and various modifications are possible without departing from the technical spirit of the present invention. Therefore, the present invention should be construed as limited only by the following utility model registration claims.

Claims (5)

A DC-DC converter unit 20 for boosting charging power of the battery 1; An ultrasonic driver 50 for driving an ultrasonic element vibrating by the voltage boosted by the DC-DC converter; A switch unit 30 of the power switch and the operation switch; A display unit 40 displaying an operation state; And a CPU (2) for controlling the DC-DC converter, the skin care device driving unit, the switch unit, and the display unit. The CPU controls the strength of the output voltage by outputting a switching signal from the PWM control terminal (terminal 10) to the DC-DC converter unit by switching the intensity control operation switch SW3 of the switch unit, and controlling the mode of the switch unit. Ultrasonic skin care device, characterized in that for driving the ultrasonic drive unit in various modes by outputting a drive signal of a different frequency for each mode by switching the operation switch (SW2). The method of claim 1, The DC-DC converter section includes an output voltage measuring section (R2, R3) for measuring an output voltage value and a switching element (D3) for switching by the PWM control signal from the CPU, the PWM control terminal of the CPU Ultrasonic skin care device, characterized in that the step-up is done in software by the switching element (D3) is turned on / off by a switching signal having an appropriate duty ratio output from the. The method according to claim 1 or 2, The skin care device driving unit has a body detecting unit 60 so that when the surface of the ultrasonic device is in contact with the skin, the ultrasonic skin care device to automatically adjust the output from the drug to the steel. The method according to claim 1 or 2, The device has a temperature sensing unit 70 for sensing the temperature of a specific site, ultrasonic skin beauty device, characterized in that the output is automatically adjusted to the drug in the cavity when overheating the specific site. The method of claim 4, wherein The temperature sensing unit may include a first temperature sensing unit 71 for sensing a surface temperature of the skin diaphragm of the ultrasonic apparatus, and a second temperature sensing unit 72 for sensing the temperature of the switching elements of the oscillating unit 54 of the ultrasonic driving unit. Ultrasonic skin care device comprising a.