CN-224203628-U - Micro-current constant power control device and beauty instrument

CN224203628UCN 224203628 UCN224203628 UCN 224203628UCN-224203628-U

Abstract

The utility model relates to the technical field of beauty instruments and discloses a micro-current constant power control device and a beauty instrument, wherein the control device comprises a micro-current generation circuit, a micro-current generation circuit and a micro-current generation circuit, wherein the micro-current generation circuit is used for generating micro-current output to skin; the device comprises a micro-current generation circuit, a control circuit, a detection circuit, a power regulation circuit and a control circuit, wherein the micro-current generation circuit is used for controlling the micro-current generation circuit to output micro-current, the detection circuit is electrically connected with the micro-current generation circuit and used for acquiring a voltage signal in a skin micro-current contact passage of the beauty instrument, the power regulation circuit is connected with the control circuit and also used for receiving the voltage signal in the micro-current passage and outputting the control signal to the power regulation circuit according to the voltage signal in the micro-current passage, and the power regulation circuit is used for controlling the voltage and the current of the micro-current output by the control circuit to regulate the micro-current output by the micro-current generation circuit so as to maintain constant power output, thereby realizing constant power output, effectively improving the stability and the safety of the micro-current output, reducing the stinging sensation formed in the beauty process and greatly improving user experience.

Inventors

SHI YUNXIANG
LONG HUA

Assignees

杭州由莱科技有限公司
深圳由莱智能电子有限公司

Dates

Publication Date: 20260505
Application Date: 20250619

Claims (10)

1. A microcurrent constant power control device for a cosmetic instrument, comprising: a microcurrent generation circuit for generating microcurrents to be output to the skin; The control circuit is connected with the micro-current generation circuit and is used for controlling the micro-current generation circuit to output micro-current; the detection circuit is electrically connected with the micro-current generation circuit and is used for acquiring a voltage signal in a micro-current path when the beauty instrument is in contact with skin; the power adjusting circuit is connected with the control circuit; The power regulating circuit is used for regulating the voltage and the current of the micro current output by the micro current generating circuit under the control of the control circuit so as to maintain constant power output.
2. The micro-current constant power control device according to claim 1, wherein the power adjustment circuit comprises: The voltage regulating sub-circuit is respectively and electrically connected with the control circuit and the micro-current generating circuit and is used for regulating the voltage of the micro-current output by the micro-current generating circuit under the control of the control circuit; and the current regulating sub-circuit is respectively and electrically connected with the control circuit and the micro-current generating circuit and is used for regulating the current of the micro-current output by the micro-current generating circuit under the control of the control circuit.
3. The micro-current constant power control device according to claim 2, wherein the detection circuit comprises a filter circuit and a sampling resistor network; The sampling resistor network is used for acquiring the voltage signals in the micro-current path, and the filter circuit is used for carrying out filter processing on the voltage signals in the micro-current path.
4. A micro-current constant power control device according to claim 3, wherein the voltage signal in the micro-current path is a sampled voltage Vc of the sampled resistor network; The control circuit is used for determining the lower end voltage Vd of the micro-current generating circuit according to the voltage sampling value Vc and the resistance value of the sampling resistor network, and calculating skin impedance according to a formula R= (Vv-Vd)/(Vi/Ri) according to the lower end voltage Vd of the micro-current generating circuit, the control voltage Vi output by the control circuit to the power regulating circuit, the driving voltage Vv of the micro-current generating circuit and the constant current resistor Ri of the current regulating sub-circuit.
5. The micro-current constant power control device according to claim 2, wherein the voltage regulating sub-circuit comprises a boost circuit sub-circuit and a voltage regulating matching sub-circuit, and the voltage regulating matching sub-circuit is electrically connected with the control circuit and is used for regulating the output voltage of the boost circuit sub-circuit under the control of the control circuit.
6. The micro-current constant power control device according to claim 2, wherein the current regulation sub-circuit comprises: A transistor; The in-phase output end of the operational amplifier is connected with the control end of the transistor and is used for receiving the control voltage Vi output by the control circuit so as to control the conduction degree of the transistor; One end of the constant current resistor Ri is connected with the inverting input end of the operational amplifier and is connected in series with the transistor and the micro-current generating circuit, so that a micro-current output path is formed; The operational amplifier, the transistor and the constant current resistor Ri form a closed loop feedback structure, and after the control circuit outputs the control voltage Vi, the current regulator sub-circuit is used for forming deep negative feedback, so that the current on the constant current resistor Ri tends to be constant to be Vi/Ri.
7. The micro-current constant power control device according to claim 1, wherein the control circuit is any one of a micro-control circuit, an MCU or an FPGA.
8. The micro-current constant power control device according to claim 1, wherein the micro-current generating circuit comprises an H-bridge circuit, the H-bridge circuit comprises a plurality of pairs of switching tubes, and each switching tube is respectively connected with the control circuit and used for switching on and off under the control of the control circuit so as to generate a biphase symmetric square wave.
9. The micro-current constant power control device according to claim 1, wherein the control circuit is further configured to obtain a preset operating gear, and control the power adjustment circuit to output a corresponding voltage and current according to the skin impedance information and gear power corresponding to the preset operating gear.
10. A cosmetic apparatus comprising a microcurrent constant power control device according to any one of claims 1 to 9.

Description

Micro-current constant power control device and beauty instrument Technical Field The utility model relates to the technical field of beauty instruments, in particular to a micro-current constant power control device and a beauty instrument. Background In the field of microcurrent applications, and in particular to devices that are in contact with human skin, stable and suitable microcurrent output is critical. Currently, most prior art uses boost output to control micro-current. However, since the electrodes of the device are in contact with the skin, the impedance is affected by various complications such as the area of the electrodes in contact with the skin, whether gel is used, fit, skin moisture, temperature, and electrode material. These factors lead to a large range of skin impedance variations, which in turn leads to significant differences in the feel of the user each time they use, and poor consistency in the use experience. In addition, when the device electrode is in poor contact with the skin of a user, a tingling sensation is easily generated, and the use feeling of the user is affected. Accordingly, improvements in the art are needed. Disclosure of utility model The utility model provides a micro-current constant power control device and a beauty instrument, which are used for solving the problems existing in the prior art. In order to achieve the above object, the present utility model provides the following technical solutions: A microcurrent constant power control device for a cosmetic instrument, comprising: a microcurrent generation circuit for generating microcurrents to be output to the skin; The control circuit is connected with the micro-current generation circuit and is used for controlling the micro-current generation circuit to output micro-current; the detection circuit is electrically connected with the micro-current generation circuit and is used for acquiring a voltage signal in a micro-current path when the beauty instrument is in contact with skin; the power adjusting circuit is connected with the control circuit; The power regulating circuit is used for regulating the voltage and the current of the micro current output by the micro current generating circuit under the control of the control circuit so as to maintain constant power output. Optionally, the power adjustment circuit includes: The voltage regulating sub-circuit is respectively and electrically connected with the control circuit and the micro-current generating circuit and is used for regulating the voltage of the micro-current output by the micro-current generating circuit under the control of the control circuit; and the current regulating sub-circuit is respectively and electrically connected with the control circuit and the micro-current generating circuit and is used for regulating the current of the micro-current output by the micro-current generating circuit under the control of the control circuit. Optionally, the detection circuit comprises a filter circuit and a sampling resistor network; The sampling resistor network is used for acquiring the voltage signals in the micro-current path, and the filter circuit is used for carrying out filter processing on the voltage signals in the micro-current path. Optionally, the voltage signal in the micro-current path is a sampling voltage Vc of the sampling resistor network; The control circuit is used for determining the lower end voltage Vd of the micro-current generating circuit according to the voltage sampling value Vc and the resistance value of the sampling resistor network, and calculating skin impedance according to a formula R= (Vv-Vd)/(Vi/Ri) according to the lower end voltage Vd of the micro-current generating circuit, the control voltage Vi output by the control circuit to the power regulating circuit, the driving voltage Vv of the micro-current generating circuit and the constant current resistor Ri of the current regulating sub-circuit. Optionally, the voltage regulation sub-circuit comprises a boost circuit sub-circuit and a voltage regulation matching sub-circuit, wherein the voltage regulation matching sub-circuit is electrically connected with the control circuit and is used for regulating the output voltage of the boost circuit sub-circuit under the control of the control circuit. Optionally, the current regulation sub-circuit includes: A transistor; The in-phase output end of the operational amplifier is connected with the control end of the transistor, and the inverting input end of the operational amplifier is connected with one end of the constant current resistor Ri and is used for receiving the control voltage Vi output by the control circuit so as to control the conduction degree of the transistor; A constant current resistor Ri connected in series with the transistor and the micro-current generating circuit to form a micro-current output path; The operational amplifier, the transistor and the constant current resistor Ri form a closed l