CN215195022U - Beauty electronic product capable of freely adjusting micro-current intensity - Google Patents
Beauty electronic product capable of freely adjusting micro-current intensity Download PDFInfo
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- CN215195022U CN215195022U CN202120677610.0U CN202120677610U CN215195022U CN 215195022 U CN215195022 U CN 215195022U CN 202120677610 U CN202120677610 U CN 202120677610U CN 215195022 U CN215195022 U CN 215195022U
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Abstract
The utility model discloses a freely adjust cosmetic electronic product of little current strength, include: the system comprises an MCU circuit, a power supply circuit, a booster circuit, a DAC control circuit, an H-bridge driving circuit, a constant current detection control circuit and an output electrode, wherein the power supply circuit, the booster circuit, the DAC control circuit and the H-bridge driving circuit are respectively connected with the MCU circuit; the power circuit is connected with the boost circuit, the boost circuit is connected with the H-bridge drive circuit, and the power circuit is connected with the DAC control circuit. The utility model discloses a MCU circuit is through control DAC control circuit exports different voltages and goes to control constant current detection control circuit, reaches the intensity of the little current of free control difference to realized that the gear is adjusted, adapted to different consumers and experienced and different human skin.
Description
Technical Field
The utility model relates to a cosmetic electronic product technical field especially relates to a freely adjust cosmetic electronic product of little current strength.
Background
At present, most micro-current cosmetic products only set one voltage value independently, and the safety and experience of consumers are not really considered, and the defects are as follows:
1: only fixed voltage is output between the two cosmetic electrodes, and when the skin surface of different people is contacted and the voltage is not changed, the skin current between the two ends of the contact electrode of the current output by the two electrode ends of the micro-current product is not controlled, so that the cosmetic effect cannot be achieved when the skin internal resistance is small, and the skin of the human body is easily damaged.
2, constant current cannot be realized at different gears.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: provides a beauty electronic product capable of freely adjusting the intensity of micro-current, provides similar current for the skin of different people and realizes constant current.
The technical scheme of the utility model as follows: the cosmetic electronic product capable of freely adjusting the micro-current intensity comprises: the system comprises an MCU circuit, a power supply circuit, a booster circuit, a DAC control circuit, an H-bridge driving circuit, a constant current detection control circuit and an output electrode, wherein the power supply circuit, the booster circuit, the DAC control circuit and the H-bridge driving circuit are respectively connected with the MCU circuit; the power circuit is connected with the boost circuit, the boost circuit is connected with the H-bridge drive circuit, and the power circuit is connected with the DAC control circuit.
The power supply circuit is used for supplying power to each module, the booster circuit is used for boosting the voltage of the power supply circuit and supplying the boosted voltage to the H-bridge drive circuit, the MCU circuit is used for controlling the whole electronic product, the DAC control circuit outputs different voltages to control the constant current detection control circuit, and the aim of freely controlling the intensity of different micro-currents is achieved, so that gear adjustment is achieved, and the electronic device is suitable for different consumer experiences and different human skins. When the beauty electronic product is used, the output electrode is contacted with the skin surfaces of different human bodies, the resistance between the beauty heads of the two electrodes is different, and the moisture on the surfaces of different skins is also different, so that the resistance between the beauty heads is large or small; therefore, the constant current detection control circuit is used, the current flowing through the skin surface of the human body is detected, when the detected current is larger than the set current, the constant current detection control circuit can reduce the output voltage of the H-bridge driving circuit groove, and when the detected current is smaller than the set current, the constant current detection control circuit can improve the output voltage of the H-bridge driving circuit groove.
Further, the power supply circuit includes: the external power supply input interface is connected with the voltage stabilizing circuit. The external power supply input interface is used for being connected with an external power supply, and the voltage stabilizing circuit is used for stabilizing the voltage of the external power supply, so that other electronic components are prevented from being damaged, and the application is convenient. Preferably, the external power input interface adopts a USB interface or a type-c interface.
Further, the constant current detection control circuit includes: an operational amplifier, a first NPN type triode, a current detection resistor, a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor, a fourth voltage dividing resistor and a current limiting resistor, one end of the first voltage-dividing resistor is connected with the DAC control circuit, the other end of the first voltage-dividing resistor is connected with a positive input pin of the operational amplifier, one end of the second voltage-dividing resistor is grounded, the other end of the second voltage-dividing resistor is connected with the positive input pin of the operational amplifier, one end of the third voltage dividing resistor is connected with the output end of the operational amplifier, the other end of the third voltage dividing resistor is connected with the base electrode of the first NPN type triode, one end of the fourth voltage-dividing resistor is connected with the output end of the operational amplifier, the other end of the fourth voltage-dividing resistor is connected with the emitting electrode of the first NPN type triode, one end of the current-limiting resistor is connected with the negative input end of the operational amplifier, the other end of the current-limiting resistor is connected with the emitting electrode of the first NPN type triode, and the collecting electrode of the first NPN type triode is connected with the H-bridge driving circuit; one end of the current detection resistor is connected with an emitting electrode of the first NPN type triode, and the other end of the current detection resistor is grounded; and a positive side power supply pin of the operational amplifier is connected with the power supply circuit, and a negative side power supply pin of the operational amplifier is grounded.
When the voltage output by the DAC control circuit is increased, the difference between the positive input end and the negative input end of the operational amplifier is increased, and the voltage output by the output end of the operational amplifier is also increased, so that the conduction strength of the first NPN-type transistor is also increased, and the input of the negative input end of the operational amplifier is also increased, so that the difference between the positive input end and the negative input end of the operational amplifier is decreased to a stable value, and the conduction strength of the first NPN-type transistor is stable, and the current output by the H-bridge driving circuit is also stable.
Similarly, when the voltage output by the DAC control circuit is decreased, the difference between the positive input end and the negative input end of the operational amplifier is decreased, and the voltage output by the output end of the operational amplifier is also decreased, so that the conduction strength of the first NPN type transistor is also decreased, and the input of the negative input end of the operational amplifier is also decreased, so that the difference between the positive input end and the negative input end of the operational amplifier is increased to a stable value, and the conduction strength of the first NPN type transistor is stable, and thus the current output by the H-bridge driving circuit is stable.
Furthermore, the MCU circuit is provided with a burning interface.
Further, the cosmetic electronic product capable of freely adjusting the micro-current intensity further comprises: a switch control circuit, the switch control circuit comprising: the digital control circuit comprises a second NPN type triode, a fifth voltage-dividing resistor, a sixth voltage-dividing resistor and a P-channel MOS tube, wherein the MCU circuit is electrically connected with a base electrode of the second NPN type triode, an emitting electrode of the second NPN type triode is grounded, two ends of the fifth voltage-dividing resistor are respectively connected with a G pole and an S pole of the P-channel MOS tube, one end of the sixth voltage-dividing resistor is connected with the G pole of the P-channel MOS tube, the other end of the sixth voltage-dividing resistor is connected with a collecting electrode of the PNP type triode, the G pole of the P-channel MOS tube is connected with a power supply circuit, and the D pole of the P-channel MOS tube is respectively connected with a DAC control circuit and a constant current detection control circuit.
The MCU circuit outputs an electric signal to a base electrode of the second NPN type triode, so that an emitting electrode and a collector electrode of the second NPN type triode are conducted and grounded, a G electrode of the P-channel MOS tube becomes a low level, an S electrode and a D electrode of the P-channel MOS tube are conducted, and the voltage of the power supply circuit is output to the DAC control circuit and the constant current detection control circuit, so that the work is started. The MCU circuit does not output an electric signal to the base electrode of the second NPN type triode, so that the emitter and the collector of the second NPN type triode are not conducted, the S pole and the D pole of the P-channel MOS tube are also not conducted, the voltage of the power supply circuit cannot be output to the DAC control circuit and the constant current detection control circuit, and the work is stopped.
According to the above technical scheme, the utility model provides a freely adjust cosmetic electronic product of little current intensity, the MCU circuit is through control DAC control circuit exports different voltages and goes to control constant current detection control circuit, reaches the intensity of the little current of free control difference to realized the gear and adjusted, adapted to different consumers and experienced and different human skin. When the beauty electronic product is used, the output electrode is contacted with the skin surfaces of different human bodies, the resistance between the beauty heads of the two electrodes is different, and the moisture on the surfaces of different skins is also different, so that the resistance between the beauty heads is large or small; therefore, the constant current detection control circuit is used, the current flowing through the skin surface of the human body is detected, when the detected current is larger than the set current, the constant current detection control circuit can reduce the output voltage of the H-bridge driving circuit groove, and when the detected current is smaller than the set current, the constant current detection control circuit can improve the output voltage of the H-bridge driving circuit groove.
Drawings
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a circuit schematic of the MCU circuit;
FIG. 3 is a schematic circuit diagram of an external power input interface;
FIG. 4 is a circuit schematic of a voltage regulator circuit;
FIG. 5 is a circuit schematic of the boost circuit;
FIG. 6 is a circuit schematic of the DAC control circuit;
FIG. 7 is a schematic circuit diagram of a constant current detection control circuit;
FIG. 8 is a circuit schematic of an H-bridge driver circuit;
fig. 9 is a circuit schematic of the switch control circuit.
Wherein, the model of U1 is: the model numbers of the LF351 and the U2 are as follows: ASM1117-3.3V, U3 model: model numbers of LY1030, U4 are: the model of N76E003AQ20, U6 is: MS 5231M.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 9, the present invention provides a cosmetic electronic product capable of freely adjusting micro-current intensity, comprising: the driving circuit comprises an MCU circuit 10, a power supply circuit, a booster circuit 30, a DAC control circuit 40, an H-bridge driving circuit 50 which are respectively connected with the MCU circuit 10, a constant current detection control circuit 60 which is respectively connected with the DAC control circuit 40 and the H-bridge driving circuit 50, and an output electrode 51 which is connected with the H-bridge driving circuit 50; the power supply circuit is connected to the booster circuit 30, the booster circuit 30 is connected to the H-bridge drive circuit 50, and the power supply circuit is connected to the DAC control circuit 40.
The power circuit is used for supplying power to all modules, the booster circuit 30 is used for boosting the voltage of the power circuit and providing the boosted voltage to the H-bridge driving circuit 50, the MCU circuit 10 is used for controlling the whole electronic product, the DAC control circuit 40 outputs different voltages to control the constant current detection control circuit 60, the intensity of different micro-currents is freely controlled, and therefore gear adjustment is achieved, and the electronic device is suitable for different consumer experiences and different human skins. In the use process of the beauty electronic product, the output electrode 51 is contacted with the skin surfaces of different human bodies, the resistance between the beauty heads of the two electrodes is different, and the moisture on the surfaces of different skins is also different, so the resistance between the beauty heads is large or small; therefore, by using the constant current detection control circuit 60, by detecting the current flowing through the skin surface of the human body, when the detected current is larger than the set current, the constant current detection control circuit 60 will reduce the output voltage of the H-bridge driving circuit 50, and when the detected current is smaller than the set current, the constant current detection control circuit 60 will increase the output voltage of the H-bridge driving circuit 50.
The power supply circuit includes: an external power input interface 21, and a voltage regulator circuit 22 connected to the external power input interface 21. The external power input interface 21 is used for connecting an external power supply, and the voltage stabilizing circuit 22 is used for stabilizing the voltage of the external power supply, so that other electronic components are prevented from being damaged, and the application is convenient. In this embodiment, the external power input interface 21 is a USB interface.
The constant current detection control circuit 60 includes: an operational amplifier 61, a first NPN transistor 62, a current detection resistor 63, a first divider resistor 64, a second divider resistor 65, a third divider resistor 66, a fourth divider resistor 67, and a current limiting resistor 68, wherein one end of the first divider resistor 64 is connected to the DAC control circuit 40, the other end is connected to the positive input pin of the operational amplifier 61, one end of the second divider resistor 65 is grounded, the other end is connected to the positive input pin of the operational amplifier 61, one end of the third divider resistor 66 is connected to the output end of the operational amplifier 61, the other end is connected to the base of the first NPN transistor 62, one end of the fourth divider resistor 67 is connected to the output end of the operational amplifier 61, the other end is connected to the emitter of the first NPN transistor 62, one end of the current limiting resistor 68 is connected to the negative input end of the operational amplifier 61, and the other end is connected to the emitter of the first NPN transistor 62, the collector of the first NPN transistor 62 is connected to the H-bridge driving circuit 50; one end of the current detection resistor 63 is connected with the emitter of the first NPN type triode 62, and the other end is grounded; the positive power supply pin of the operational amplifier 61 is connected to a power supply circuit, and the negative power supply pin of the operational amplifier 61 is grounded.
When the voltage output by the DAC control circuit 40 is increased, the difference between the positive input terminal and the negative input terminal of the operational amplifier 61 is increased, and the voltage output by the output terminal of the operational amplifier 61 is also increased, so that the conduction strength of the first NPN transistor 62 is also increased, and the input to the negative input terminal of the operational amplifier 61 is also increased, so that the difference between the positive input terminal and the negative input terminal of the operational amplifier 61 is decreased to a stable value, so that the conduction strength of the first NPN transistor 62 is stable, and the current output by the H-bridge driving circuit 50 is also stable.
Similarly, when the voltage output by the DAC control circuit 40 is decreased, the difference between the positive input terminal and the negative input terminal of the operational amplifier 61 is decreased, and the voltage output by the output terminal of the operational amplifier 61 is also decreased, so that the conduction strength of the first NPN transistor 62 is also decreased, and the input of the negative input terminal of the operational amplifier 61 is also decreased, so that the difference between the positive input terminal and the negative input terminal of the operational amplifier 61 is also increased to a stable value, so that the conduction strength of the first NPN transistor 62 is stable, and the current output by the H-bridge driving circuit 50 is also stable.
The MCU circuit 10 is provided with a burning interface 11.
The beauty electronic product capable of freely adjusting the micro-current intensity also comprises: a switch control circuit, the switch control circuit comprising: the digital control circuit comprises a second NPN type triode 71, a fifth voltage-dividing resistor 72, a sixth voltage-dividing resistor 73 and a P-channel MOS tube 74, wherein the MCU circuit 10 is electrically connected with the base electrode of the second NPN type triode 71, the emitter electrode of the second NPN type triode 71 is grounded, two ends of the fifth voltage-dividing resistor 72 are respectively connected with the G pole and the S pole of the P-channel MOS tube 74, one end of the sixth voltage-dividing resistor 73 is connected with the G pole of the P-channel MOS tube 74, the other end of the sixth voltage-dividing resistor 73 is connected with the collector electrode of the PNP type triode, the G pole of the P-channel MOS tube 74 is connected with the power supply circuit, and the D pole of the P-channel MOS tube 74 is respectively connected with the DAC control circuit 40 and the constant current detection control circuit 60.
The MCU circuit 10 outputs an electric signal to the base of the second NPN transistor 71, so that the emitter and the collector of the second NPN transistor 71 are conducted and grounded, the G-pole of the P-channel MOS transistor 74 becomes a low level, the S-pole and the D-pole of the P-channel MOS transistor 74 are conducted, and the voltage of the power supply circuit is output to the DAC control circuit 40 and the constant current detection control circuit 60, thereby starting operation. The MCU circuit 10 does not output an electrical signal to the base of the second NPN transistor 71, so that the emitter and the collector of the second NPN transistor 71 are not turned on, the S-and D-poles of the P-channel MOS transistor 74 are also not turned on, and the voltage of the power circuit cannot be output to the DAC control circuit 40 and the constant current detection control circuit 60, i.e., the operation is stopped.
To sum up, the utility model provides a freely adjust cosmetic electronic product of little current intensity, MCU circuit is through control DAC control circuit exports different voltages and goes to control constant current detection control circuit, reaches the intensity of the little current of free control difference to realized the gear and adjusted, adapted to different consumers and experienced and different human skin. When the beauty electronic product is used, the output electrode is contacted with the skin surfaces of different human bodies, the resistance between the beauty heads of the two electrodes is different, and the moisture on the surfaces of different skins is also different, so that the resistance between the beauty heads is large or small; therefore, the constant current detection control circuit is used, the current flowing through the skin surface of the human body is detected, when the detected current is larger than the set current, the constant current detection control circuit can reduce the output voltage of the H-bridge driving circuit groove, and when the detected current is smaller than the set current, the constant current detection control circuit can improve the output voltage of the H-bridge driving circuit groove.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A cosmetic electronic product capable of freely adjusting micro-current intensity is characterized by comprising: the system comprises an MCU circuit, a power supply circuit, a booster circuit, a DAC control circuit, an H-bridge driving circuit, a constant current detection control circuit and an output electrode, wherein the power supply circuit, the booster circuit, the DAC control circuit and the H-bridge driving circuit are respectively connected with the MCU circuit; the power circuit is connected with the boost circuit, the boost circuit is connected with the H-bridge drive circuit, and the power circuit is connected with the DAC control circuit.
2. The cosmetic electronic product capable of freely adjusting the intensity of micro-current according to claim 1, characterized in that the power supply circuit comprises: the external power supply input interface is connected with the voltage stabilizing circuit.
3. The cosmetic electronic product capable of freely adjusting the intensity of micro-current according to claim 1, wherein the constant current detection control circuit comprises: an operational amplifier, a first NPN type triode, a current detection resistor, a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor, a fourth voltage dividing resistor and a current limiting resistor, one end of the first voltage-dividing resistor is connected with the DAC control circuit, the other end of the first voltage-dividing resistor is connected with a positive input pin of the operational amplifier, one end of the second voltage-dividing resistor is grounded, the other end of the second voltage-dividing resistor is connected with the positive input pin of the operational amplifier, one end of the third voltage dividing resistor is connected with the output end of the operational amplifier, the other end of the third voltage dividing resistor is connected with the base electrode of the first NPN type triode, one end of the fourth voltage-dividing resistor is connected with the output end of the operational amplifier, the other end of the fourth voltage-dividing resistor is connected with the emitting electrode of the first NPN type triode, one end of the current-limiting resistor is connected with the negative input end of the operational amplifier, the other end of the current-limiting resistor is connected with the emitting electrode of the first NPN type triode, and the collecting electrode of the first NPN type triode is connected with the H-bridge driving circuit; one end of the current detection resistor is connected with an emitting electrode of the first NPN type triode, and the other end of the current detection resistor is grounded; and a positive side power supply pin of the operational amplifier is connected with the power supply circuit, and a negative side power supply pin of the operational amplifier is grounded.
4. The cosmetic electronic product capable of freely adjusting the intensity of micro current as claimed in claim 1, wherein the MCU circuit is provided with a burning interface.
5. The cosmetic electronic product for freely adjusting the intensity of micro-current according to claim 1, further comprising: a switch control circuit, the switch control circuit comprising: the digital control circuit comprises a second NPN type triode, a fifth voltage-dividing resistor, a sixth voltage-dividing resistor and a P-channel MOS tube, wherein the MCU circuit is electrically connected with a base electrode of the second NPN type triode, an emitting electrode of the second NPN type triode is grounded, two ends of the fifth voltage-dividing resistor are respectively connected with a G pole and an S pole of the P-channel MOS tube, one end of the sixth voltage-dividing resistor is connected with the G pole of the P-channel MOS tube, the other end of the sixth voltage-dividing resistor is connected with a collecting electrode of the PNP type triode, the G pole of the P-channel MOS tube is connected with a power supply circuit, and the D pole of the P-channel MOS tube is respectively connected with a DAC control circuit and a constant current detection control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120677610.0U CN215195022U (en) | 2021-03-31 | 2021-03-31 | Beauty electronic product capable of freely adjusting micro-current intensity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120677610.0U CN215195022U (en) | 2021-03-31 | 2021-03-31 | Beauty electronic product capable of freely adjusting micro-current intensity |
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| CN215195022U true CN215195022U (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120677610.0U Active CN215195022U (en) | 2021-03-31 | 2021-03-31 | Beauty electronic product capable of freely adjusting micro-current intensity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117891301A (en) * | 2024-01-24 | 2024-04-16 | 深圳艾摩米智能科技有限公司 | Micro-current output circuit |
-
2021
- 2021-03-31 CN CN202120677610.0U patent/CN215195022U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117891301A (en) * | 2024-01-24 | 2024-04-16 | 深圳艾摩米智能科技有限公司 | Micro-current output circuit |
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