CN211381285U - Skin care equipment - Google Patents

Skin care equipment Download PDF

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Publication number
CN211381285U
CN211381285U CN201721048962.XU CN201721048962U CN211381285U CN 211381285 U CN211381285 U CN 211381285U CN 201721048962 U CN201721048962 U CN 201721048962U CN 211381285 U CN211381285 U CN 211381285U
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circuit
electrically connected
skin
voltage
resistor
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李海廷
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Shenzhen H&T Intelligent Control Co Ltd
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Shenzhen H&t Smart Home Technology Co ltd
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Abstract

The embodiment of the utility model provides a relate to human nursing smart machine technical field, especially relate to a skin care equipment, skin care equipment includes control circuit, surveys skin circuit, skin care circuit, oscillation piece and skin contact, control circuit respectively with survey skin circuit and skin care circuit electric connection. The embodiment of the utility model provides a test signal through surveying skin circuit receiving control circuit and sending, will signal processing is carried out to the signal behind test signal process human skin to give control circuit and handle, obtain skin test result after control circuit handles. The skin care circuit receives the driving signal of the control circuit and processes the signal, so that the processed signal drives the oscillating piece to vibrate, and the skin contact piece for caring the skin is driven to vibrate, and the effect of caring the skin is achieved. The embodiment of the utility model provides a have skin test and skin nursing function concurrently, user experience is good.

Description

Skin care equipment
Technical Field
The utility model discloses embodiment relates to human nursing smart machine technical field, especially relates to a skin care equipment.
Background
The existing human body skin measuring instrument adopts a processor such as a single chip microcomputer to send out a square wave signal with a certain frequency, then the square wave signal is processed through a voltage division circuit and an amplifying circuit, the processed signal is subjected to differential processing after passing through human skin to obtain a spike pulse signal, the pulse signal is subjected to smoothing processing of a multi-stage low-pass filter circuit and appropriate signal amplification processing to obtain a sampling AD value which can be processed by the processor, and the sampling AD value is combined with a related algorithm to obtain the moisture and oil values of the human skin.
In the process of implementing the present invention, the inventor finds that the prior art has the following technical problems: the existing skin measuring instrument has a single function, and has a skin measuring function only, so that the skin cannot be nursed at the same time, and the user experience is poor.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a main technical problem who solves provides a manifold skin care equipment of function, has skin test and skin nursing function concurrently, and user experience is good.
In order to solve the technical problem, the utility model adopts a technical scheme that a skin care device is provided, which comprises a control circuit, a skin measuring circuit, a skin care circuit, an oscillating piece and a skin contact piece;
the control circuit is respectively electrically connected with the skin test circuit and the skin care circuit and is used for sending a test signal to the skin test circuit and sending a driving signal to the skin care circuit;
the skin test circuit is used for receiving the test signal sent by the control circuit, processing the signal of the test signal after passing through the skin of a human body, and sending the signal to the control circuit, and the control circuit is also used for receiving and processing the signal sent by the skin test circuit to obtain a skin test result;
the skin care device comprises an oscillating piece, a skin care circuit and a control circuit, wherein the oscillating piece is connected with the output end of the skin care circuit, the skin contact piece for caring skin is fixed on the oscillating piece, and the skin care circuit is used for receiving a driving signal of the control circuit and processing the signal so as to drive the oscillating piece to vibrate by the processed signal.
Optionally, the skin measuring circuit includes a first skin contact, a second skin contact, a differentiating circuit, a voltage following circuit, and a filter circuit;
the skin contact is electrically connected with the output end of the control circuit, the second skin contact is electrically connected with the input end of the differential circuit, the output end of the differential circuit is electrically connected with the input end of the voltage follower circuit, the output end of the voltage follower circuit is electrically connected with one end of the filter circuit, and the other end of the filter circuit is electrically connected with the input end of the control circuit.
Optionally, the skin care circuit includes a first switch tube, a first resistor, a transformer and a voltage sampling circuit, a first end of the first switch tube is electrically connected to an output end of the control circuit through the first resistor, a second end of the first switch tube is electrically connected to a primary side of the transformer, a secondary side of the transformer is electrically connected to the oscillating element, a third end of the first switch tube is electrically connected to an input end of the voltage sampling circuit, and an output end of the voltage sampling circuit is electrically connected to an input end of the control circuit.
Optionally, the skin care circuit further includes a first low-pass filter circuit, and the first low-pass filter circuit is electrically connected between the voltage sampling circuit and the input terminal of the control circuit.
Optionally, the skin care device further comprises a foam generating unit, the foam generating unit comprising a motor drive circuit, a motor and a rotating foam head;
the input end of the motor driving circuit is electrically connected with the control circuit, the output end of the motor driving circuit is electrically connected with the motor, the motor driving circuit is used for driving the motor to move forwards and backwards, and the motor is connected with the rotary foam head and used for driving the rotary foam head to rotate.
Optionally, the motor driving circuit includes:
the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth switch tube, the seventh switch tube, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor and the ninth resistor;
the first end of the second switching tube is electrically connected with the control circuit through a second resistor, the second end of the second switching tube is electrically connected with a fourth power supply voltage through a third resistor and a fourth resistor in sequence, the third end of the second switching tube is electrically connected with the second power supply voltage, the common connecting end of the third resistor and the fourth resistor is electrically connected with the first end of a fourth switching tube, the third end of the fourth switching tube is connected with the fourth power supply voltage, the second end of the fourth switching tube is electrically connected with the second end of a fifth switching tube, and the third end of the fifth switching tube is connected with the second power supply voltage;
the first end of the third switching tube is electrically connected with the control circuit through a fifth resistor, the second end of the third switching tube is connected with a fourth power supply voltage through a sixth resistor and a seventh resistor in sequence, the third end of the third switching tube is connected with the second power supply voltage, the common connecting end of the sixth resistor and the seventh resistor is electrically connected with the first end of the sixth switching tube, the third end of the sixth switching tube is connected with the fourth power supply voltage, the second end of the sixth switching tube is electrically connected with the second end of the seventh switching tube, and the third end of the seventh switching tube is connected with the second power supply voltage;
the first end of the fifth switching tube is electrically connected with the control circuit through an eighth resistor, and the first end of the seventh switching tube is electrically connected with the control circuit through a ninth resistor;
and the common connecting end of the fourth switching tube and the fifth switching tube and the common connecting end of the sixth switching tube and the seventh switching tube are respectively used as the input ends of the motor.
Optionally, the motor driving circuit further includes a second voltage sampling circuit, the second voltage sampling circuit includes a tenth resistor and a second low-pass filter circuit, one end of the tenth resistor is connected to the second power voltage, the other end of the tenth resistor is electrically connected to the common connection end of the fifth switching tube and the seventh switching tube and the input end of the second low-pass filter circuit, and the output end of the second low-pass filter circuit is electrically connected to the control circuit.
Optionally, equipment still includes pH valve detection circuitry, pH valve detection circuitry includes constant current source circuit, PH electrode and amplifier, the PH electrode sets up in rotatory foam head, the input of constant current source circuit electric connection PH electrode for provide the constant current for the PH electrode, the input of the output electric connection amplifier of PH electrode, the output electric connection control circuit of amplifier.
Optionally, the constant current source circuit includes a first voltage divider circuit, an eleventh resistor, and an operational amplifier, an input end of the first voltage divider circuit is connected to the first power voltage and the second power voltage, an output end of the first voltage divider circuit is connected to a non-inverting input end of the operational amplifier, a power supply end of the operational amplifier is connected to the second power voltage and the first power voltage, one end of the eleventh resistor is connected to the second power voltage, the other end of the eleventh resistor is connected to an inverting input end of the operational amplifier and an input end of the PH electrode, and an output end of the operational amplifier is connected to the other input end of the PH electrode.
Optionally, the equipment further comprises a power circuit and a booster circuit, wherein the power circuit is electrically connected with the control circuit, the skin care circuit and the booster circuit respectively, the power circuit is used for supplying power to the control circuit and the skin care circuit and supplying power to the booster circuit, and the booster circuit is connected with the foam generation unit and is used for supplying power to the foam generation unit.
Optionally, the power circuit includes a charging management circuit, a rechargeable battery, a first diode, a second diode, and a voltage reduction circuit, wherein a first end of the rechargeable battery is electrically connected to the second power voltage, a second end of the rechargeable battery is electrically connected to the third power voltage through the charging management circuit, and is electrically connected to an anode of the first diode, a cathode of the first diode is electrically connected to a cathode of the second diode and the voltage reduction circuit, and an anode of the second diode is connected to the third power voltage;
the output end of the voltage reduction circuit is used as the first output end of the power supply circuit to output a first power supply voltage, the common connection end of the first diode and the second diode is used as the second output end of the power supply circuit to be connected with the voltage boost circuit, and the voltage boost circuit outputs a fourth power supply voltage.
Optionally, the power circuit further includes a second voltage divider, a first input end of the second voltage divider is electrically connected to the third power voltage, a second input end of the second voltage divider is electrically connected to the second power voltage, and an output end of the second voltage divider serving as a charging state detection end of the rechargeable battery is electrically connected to the control circuit.
Optionally, the skin care device further comprises a gyroscope module, the gyroscope module is arranged on one side of the rotating foam head, the gyroscope module is electrically connected with the control circuit, and the gyroscope module is used for sensing the position of the rotating foam head and sending the position information to the control circuit.
Optionally, the skin care device further comprises a key circuit, an indication circuit and a wireless communication circuit, wherein the key circuit, the indication circuit and the wireless communication circuit are respectively electrically connected with the control circuit.
The utility model discloses embodiment's beneficial effect is: the embodiment of the utility model provides a test signal through surveying skin circuit receiving control circuit and sending, will test signal flows through human skin, carries out analog signal processing and sends for control circuit to handle to the signal after flowing through human skin, obtains skin test result after control circuit handles. The skin care circuit receives the driving signal of the control circuit and processes the signal, so that the processed signal drives the oscillating piece to vibrate, and the skin contact piece for caring the skin is driven to vibrate, and the effect of caring the skin is achieved. The embodiment of the utility model provides a have skin test and skin nursing function concurrently, user experience is good.
Drawings
FIG. 1 is a schematic diagram of the circuit configuration of one embodiment of the skin treatment device of the present invention;
FIG. 2 is a schematic diagram of the power circuit of an embodiment of the skin treatment device of the present invention;
FIG. 3 is a schematic diagram of the circuit structure of the skin measurement circuit in an embodiment of the skin treatment apparatus of the present invention;
FIG. 4 is a schematic diagram of the circuit configuration of the skin care circuit in an embodiment of the skin treatment device of the present invention;
fig. 5 is a schematic circuit diagram of a skin measurement circuit according to an embodiment of the skin treatment apparatus of the present invention;
FIG. 6 is a schematic diagram of the circuit configuration of the skin care circuit in an embodiment of the skin treatment device of the present invention;
FIG. 7 is a schematic diagram of the power circuit of an embodiment of the skin treatment device of the present invention;
FIG. 8 is a schematic diagram of the circuit configuration of one embodiment of the skin treatment device of the present invention;
fig. 9 is a schematic circuit diagram of a motor driving circuit in an embodiment of the skin care device of the present invention;
fig. 10 is a schematic circuit diagram of a motor driving circuit in an embodiment of the skin treatment device of the present invention;
FIG. 11 is a schematic diagram of a circuit configuration of an alkalinity-acidity detection circuit according to an embodiment of the skin care device of the present invention;
fig. 12 is a schematic circuit diagram of a circuit for detecting ph value in an embodiment of the skin care device of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-5 together, an embodiment of the present invention provides a skin care device, which includes a control circuit 10, a skin measurement circuit 20 and a skin care circuit 30, wherein the control circuit 10 is electrically connected to the skin measurement circuit 20 and the skin care circuit 30, respectively. The control circuit 10 is configured to send a test signal to the skin test circuit 20, after the skin test circuit 20 receives the test signal, the test signal flows through the skin of the human body, then analog signal processing is performed on the signal after flowing through the skin of the human body, and then the processed signal is sent to the control circuit 10, and the control circuit 10 processes the signal to obtain a skin test result. The control circuit 10 is further configured to send a driving signal to the skin care circuit 30, an output end of the skin care circuit 30 is connected to an oscillating member (not shown in the figure), a skin contact member (not shown in the figure) for caring skin is fixed on the oscillating member, the skin care circuit 30 processes the signal after receiving the driving signal of the control circuit 10, the processed signal can drive the oscillating member to vibrate, the oscillating member vibrates to drive the skin contact member to vibrate, and the vibrating skin contact member acts on the skin of a human body, so that a skin care effect is achieved. In this embodiment, the skin care apparatus further comprises a power circuit 40 for providing power to the control circuit 10 and the skin care circuit 30, and in other embodiments of the apparatus, an external power source may also be used to supply power to the control circuit 10 and the skin care circuit 30.
The power circuit 40 may adopt a circuit structure as shown in fig. 2, the power circuit 40 includes a charging management circuit 41, a rechargeable battery BT1, a first diode D1, a second diode D2 and a voltage reduction circuit 42, a cathode of the rechargeable battery BT1 is electrically connected to the second power voltage, an anode of the rechargeable battery BT1 is electrically connected to the third power voltage through the charging management circuit 41, and is electrically connected to an anode of the first diode D1, a cathode of the first diode D1 is electrically connected to a cathode of the second diode D2 and the voltage reduction circuit 42, and an anode of the second diode D2 is connected to the third power voltage. The charging management circuit 41 is used for managing the charging and discharging conditions of the rechargeable battery BT1, the voltage reduction circuit 42 is used for reducing the input voltage and outputting a first power voltage, the first power voltage can supply power to the control circuit 10 and the skin care circuit 30, and the third power voltage obtains a Vb voltage through the second diode D2.
In practical application, the third power voltage may be +5V, the second power voltage may be a GND ground, the +5V voltage may be supplied through a Universal Serial Bus (USB) charging interface, and the first power voltage may be + 3.3V. In other embodiments, the first power supply voltage may not be provided by the power circuit 40, but may be provided directly by an external power source.
When the rechargeable battery BT1 is in a charging state, the +5V voltage obtains a Vb voltage through the second diode D2, and at the moment, since Vb is larger than the Vbat voltage, the first diode D1 is not conducted, so that the rechargeable battery is ensured not to discharge in the charging state. When the rechargeable battery BT1 is not charged, the rechargeable battery voltage obtains a voltage Vb through the first diode D1, and Vb obtains a voltage (first power supply voltage) of 3.3V through the voltage-decreasing circuit 42.
The skin test circuit 20 may adopt a circuit structure as shown in fig. 3, the skin test circuit 20 includes a first skin contact TP1, a second skin contact TP2, a differential circuit 21, a voltage follower circuit 22 and a filter circuit 23, the first skin contact TP1 and the second skin contact TP2 are used for contacting human skin, the first skin contact TP1 is electrically connected to an output end of the control circuit 10 and is used for receiving a control signal sent by the control circuit 10, the second skin contact TP2 is electrically connected to the differential circuit 21, the voltage follower circuit 22 and the filter circuit 23 in turn, and the filter circuit 23 is connected to an input end of the control circuit 10. The specific structure of the differentiating circuit 21, the voltage follower circuit 22 and the filter circuit 23 can be as shown in fig. 5, the skin impedance of human body is equivalent to a parallel circuit 24 of a resistor and a capacitor, wherein the differentiating circuit 21 is composed of a capacitor and a resistor, the voltage follower circuit 22 is composed of an operational amplifier U11, the power supply terminals of the operational amplifier U11 are respectively connected with a first power supply voltage (+3.3V) and a second power supply voltage (ground), and the filter circuit 23 is composed of a capacitor. When the skin test circuit 20 works, the control circuit 10 sends a test signal, for example, a Pulse Width Modulation (PWM) signal with a frequency of 4.7KHz and an amplitude of 3.3V, the PWM signal passes through the skin of the human body through the first skin contact TP1 and the second skin contact TP2, the signal passing through the skin of the human body is subjected to differential processing by the differential circuit 21 composed of a capacitor and a resistor, and then is subjected to smooth filtering by the voltage follower circuit 22 and the filter circuit 23 to obtain a dc voltage signal, which is sent to the sampling IO1 interface of the control circuit 10. The control circuit 10 obtains a sampling AD value, and the moisture and oil values of the human skin can be obtained by combining the sampling AD value with a relation algorithm of the human skin electrical impedance and the moisture and oil. The algorithm for the relation between the human skin electrical impedance and the moisture and oil is the prior art and is not developed here. The differential circuit 21 and the voltage follower circuit 22 are combined, so that the signal processing speed is increased, and the rapid and accurate measurement of the moisture and the oil content of the skin of a human body is realized.
The skin care circuit 30 may adopt a circuit structure as shown in fig. 4, where the skin care circuit 30 includes a first switch tube Q1, a first resistor R1, a transformer 31, and a voltage sampling circuit 33, a first end of the first switch tube Q1 is electrically connected to an output end of the control circuit through the first resistor R1, a second end of the first switch tube Q1 is electrically connected to a primary side of the transformer 31, a secondary side of the transformer 31 is electrically connected to the oscillating element 32, a third end of the first switch tube Q1 is electrically connected to an input end of the voltage sampling circuit 33, and an output end of the voltage sampling circuit 33 is electrically connected to an input end of the control circuit.
The first switch tube may be one of a high voltage transistor, a Metal Oxide Semiconductor (MOS) transistor, or an insulated gate bipolar transistor, and the MOS tube is taken as an example below (an N-channel MOS tube is taken as an example in fig. 4).
The MOS tube and the transformer 31 form a switch power circuit, the secondary side of the transformer 31 is connected with an oscillating piece 32 through a connecting terminal, and the oscillating piece 32 is fixed on a skin contact piece, such as an ultrasonic oscillating piece, and the skin contact piece is a stainless steel metal shovel head. When the skin care circuit 30 works, the control circuit 10 sends out a driving signal, for example, a 23KHZ PWM signal SON _ PWM, the gate G of the MOS tube Q1 is driven, and the MOS tubes D-S are conducted, so that under the action of the high-frequency pulse driving oscillation piece, the skin contact piece vibrates at the ultrasonic frequency to lift and strain the skin, remove cutin and the like. The voltage sampling circuit 33 is connected to the S-pole of the MOS transistor to generate a voltage, and the obtained SON _ AD sampling voltage signal is sent to the control circuit 10 for processing, and the control circuit 10 can determine whether the positive pole and the negative pole of the oscillating piece are short-circuited through the voltage signal, so as to prevent the circuit from being damaged.
The embodiment of the utility model provides a test signal through surveying skin circuit receiving control circuit and sending, will test signal flows through human skin, carries out analog signal processing and sends for control circuit to handle to the signal after flowing through human skin, obtains skin test result after control circuit handles. The skin care circuit receives the driving signal of the control circuit and processes the signal, so that the processed signal drives the oscillating piece to vibrate, and the skin contact piece for caring the skin is driven to vibrate, and the effect of caring the skin is achieved. The embodiment of the utility model provides a have skin test and skin nursing function concurrently, user experience is good.
Optionally, in other embodiments of the device, the skin test circuit may also adopt other circuit structures, for example, the test signal of the control circuit is processed through the voltage division circuit and the amplification circuit as described in the background art, then the processed test signal is subjected to differentiation processing after being subjected to human skin to obtain a spike pulse signal, and then the pulse signal is subjected to smoothing processing by the multistage low-pass filter circuit and appropriate amount of signal amplification processing to obtain a sampled AD voltage value which can be processed by the control circuit. The scheme is processed in multiple stages, the processing time is long, and tests show that the time of more than 30 seconds is needed to obtain a stable sampling AD voltage value. If the measurement result is given at about 10S, the measurement result will be inaccurate because the voltage value is still rising at 10S, and if the measurement result is given after 30S, the test time will be long and the consumer experience will be poor. By adopting the scheme of combining the differential circuit 21 and the voltage follower circuit 22, a stable sampling AD voltage value can be obtained within about 10S, and the rapid and accurate measurement of the moisture and oil content of the skin of a human body can be realized.
Alternatively, in other embodiments of the device, the skin care circuit 30 may not include the voltage sampling circuit 33, and the third terminal of the first open light tube Q1 is directly grounded. However, since the skin contact member is often in contact with a conductive liquid such as water, the positive and negative electrodes of the oscillating member 32 are likely to cause a short circuit, and if the short circuit state cannot be detected, the short circuit state may not be detected for a long time, which may cause circuit damage, and the oscillating member 32 may lose its oscillating function.
Optionally, in another embodiment of the apparatus, the skin care circuit 30 may also adopt a circuit structure as shown in fig. 6, in which the voltage sampling circuit 33 includes a sampling resistor, one end of the sampling resistor is grounded, and the other end is connected to the third end of the first switching tube Q1. The skin care circuit 30 further includes a first low-pass filter circuit 34 composed of a resistor and a capacitor, and the voltage collected by the sampling resistor is subjected to low-pass filtering and then sent to the control circuit 10. When the oscillating element 32 is in a normal working state, the maximum value of the sampling voltage SON _ AD will not exceed a set value, and when the oscillating element 32 is in a short-circuit state of positive and negative electrodes, the secondary side of the transformer 31 is short-circuited and reacts to the primary side of the transformer 31, and the sampling voltage SON _ AD will be much larger than the set value, so that whether the positive and negative electrodes of the oscillating element 32 are short-circuited can be judged through the control circuit 10.
Optionally, in another embodiment of the apparatus, as shown in fig. 7, the power circuit 40 further includes a second voltage-dividing circuit 43, one end of the second voltage-dividing circuit 43 is electrically connected to the third power voltage, and the other end is connected to the second power voltage, the second voltage-dividing circuit 43 is composed of two resistors connected in series, a common connection end of the two resistors is used as an output end 5V _ CHK of the second voltage-dividing circuit 43, and the output end is used as a charging state detection end of the rechargeable battery and is electrically connected to the control circuit 10. The charging state can be detected by detecting the charging voltage 5V _ CHK, and when the voltage 5V _ CHK is higher than a set value, the device can be judged to be in the charging state, and at the moment, the control circuit can command the device to stop working.
Optionally, in another embodiment of the apparatus, referring to fig. 8, the skin care apparatus further includes a foam generating unit 50, where the foam generating unit 50 includes a motor and a rotating foam head, and the motor is connected to the rotating foam head and is used for driving the rotating foam head to rotate. The input end of the motor driving circuit is electrically connected with the control circuit 10, and the output end of the motor driving circuit is electrically connected with the motor and used for driving the motor to move forwards and backwards, and the motor drives the rotary foam head to rotate, so that the facial cleanser and the like can be foamed to produce a facial cleaning effect.
The embodiment of the utility model provides a with skin test, foam preparation and skin nursing (for example shovel skin, carry and draw the function) to combine together, utilize the high frequency vibrations of shovel head to produce the foam and spray, get rid of the skin foreign matter, reach clean and cutin removing effect. Through the comparison of the water and oil content values of the skin before and after face cleaning, better experience is provided for users.
The motor driving circuit may adopt a circuit structure shown in fig. 9, and includes: a second switching tube Q2, a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5, a sixth switching tube Q6 and a seventh switching tube Q7 (fig. 9 illustrates that the second switching tube and the third switching tube are high voltage transistors, and the fourth switching tube, the fifth switching tube, the sixth switching tube and the seventh switching tube are MOS tubes).
A first end of the second switching tube Q2 is electrically connected to the control circuit 10 through a second resistor R2, a second end of the second switching tube Q2 is electrically connected to a fourth power voltage through a third resistor R3 and a fourth resistor R4 in sequence, a third end of the second switching tube Q2 is electrically connected to the second power voltage, a common connection end of the third resistor R3 and the fourth resistor R4 is electrically connected to a first end of the fourth switching tube Q4, a third end of the fourth switching tube Q4 is connected to the fourth power voltage, a second end of the fourth switching tube Q4 is electrically connected to a second end of the fifth switching tube Q5, and a third end of the fifth switching tube Q5 is connected to the second power voltage.
A first end of a third switching tube Q3 is electrically connected to the control circuit through a fifth resistor R5, a second end of the third switching tube Q3 is connected to a fourth power voltage through a sixth resistor R6 and a seventh resistor R7 in sequence, a third end of the third switching tube Q3 is connected to the second power voltage, a common connection end of the sixth resistor R6 and the seventh resistor R7 is electrically connected to a first end of a sixth switching tube Q6, a third end of the sixth switching tube Q6 is connected to the fourth power voltage, a second end of the sixth switching tube Q6 is electrically connected to a second end of a seventh switching tube Q7, and a third end of the seventh switching tube Q7 is connected to the second power voltage.
A first end of the fifth switch tube Q5 is electrically connected to the control circuit through an eighth resistor R8, and a first end of the seventh switch tube Q7 is electrically connected to the control circuit through a ninth resistor R9;
the common connection terminal of the fourth switching tube Q4 and the fifth switching tube Q5 and the common connection terminal of the sixth switching tube Q6 and the seventh switching tube Q7 are connected to a connection terminal J4, and the motor is connected through the connection terminal J4.
The fourth power supply voltage VUP may be obtained from the Vb voltage shown in fig. 2 or fig. 7 through a boost circuit, or may be directly supplied from an external power supply.
The driving signals received by the second switch tube Q2 and the seventh switch tube Q7 are PWM3 signals, the driving signals received by the third switch tube Q3 and the fifth switch tube Q5 are PWM2 signals, and the signals PWM2 and PWM3 cannot be simultaneously at a high level, otherwise damage to the motor is easily caused. When the PWM3 signal is at high level, the second switch tube Q2 and the seventh switch tube Q7 are turned on, the third resistor R3 connected to the fourth switch tube Q4 is grounded, the fourth switch tube Q4 is turned on, the voltage VUP is grounded through the motor load and the seventh switch tube Q7, and the reverse rotation of the motor is realized. When the PWM2 is at high level, the third switch Q3 and the fifth switch Q5 are turned on, the sixth resistor R6 connected to the sixth switch Q6 is grounded, the sixth switch Q6 is turned on, the voltage VUP is grounded through the motor load and the fifth switch Q5, and the forward rotation of the motor is realized.
Optionally, in another embodiment of the apparatus, as shown in fig. 10, the motor driving circuit further includes a second voltage sampling circuit 51, the second voltage sampling circuit 51 includes a tenth resistor R10 and a second low-pass filter circuit, one end of the tenth resistor R10 is connected to the second power voltage, the other end of the tenth resistor R10 is electrically connected to the common connection end of the fifth switching tube Q5 and the seventh switching tube Q7 and the input end of the second low-pass filter circuit, and the output end of the second low-pass filter circuit is electrically connected to the control circuit. The second low-pass filter circuit is composed of a resistor and a capacitor. The tenth resistor R10 detects the current flowing through the motor and converts the current into a CTI _ AD voltage, the CTI _ AD voltage is processed by a low-pass filter circuit composed of a resistor and a capacitor and then sent to the control circuit 10, and the control circuit 10 can detect the operation condition of the motor according to the voltage value.
Optionally, in another embodiment of the apparatus, referring to fig. 8, the apparatus further includes a ph detection circuit 60, configured to detect the ph of a facial cleanser such as facial cleanser, so as to provide a reference for a user to select a suitable facial cleanser according to their skin characteristics. As shown in fig. 11, the PH value detecting circuit 60 includes a constant current source circuit 61, a PH electrode 62 and an amplifier 63, the PH electrode 62 is disposed in the rotary foam head, the constant current source circuit 61 is electrically connected to an input end of the PH electrode 62 for providing a constant current for the PH electrode 62, an output end of the PH electrode 62 is electrically connected to an input end of the amplifier 63, and an output end of the amplifier 63 is electrically connected to the control circuit 10. The PH electrode can be a gel PH electrode selected according to the form of the facial cleanser, the PH electrode is divided into an indicating electrode and a reference electrode, the reference electrode does not change along with the change of the concentration of a test object, the indicating electrode is very sensitive to the concentration of the test object, the electrode potential is a function of ions of an object to be tested, and therefore, the electrode electromotive force and the ion concentration of the object to be tested are in one-to-one correspondence relation. Therefore, when a constant current is supplied to the PH electrode 62 by the constant current source circuit 61, the ion concentration of the analyte can be obtained by measuring the electromotive force of the PH electrode.
Alternatively, in some embodiments of the apparatus, as shown in fig. 12, the PH electrode may be formed by a bridge RB1 formed by resistors, wherein Rd and Ra in the bridge RB1 are variable resistors whose resistance varies with the acidity or alkalinity of the facial cleanser, thereby causing the electrode potentials of D + and D-to be different. The constant current source circuit 61 comprises a first voltage division circuit consisting of a resistor R12 and a resistor R13, an eleventh resistor R11 and an operational amplifier U12, one end of the resistor R12 is connected with +3.3V voltage and the other end is connected with a resistor R13, the other end of the resistor R13 is grounded, the common connection end of the resistor R12 and the resistor R13 is connected with the non-inverting input end of the operational amplifier U12, the power supply end of the operational amplifier U12 is connected with +3.3V voltage and ground, one end of the eleventh resistor R11 is grounded, the other end is respectively connected with the inverting input end of the operational amplifier U12 and one input end of the PH electrode, and the output end of the operational amplifier U12 is connected with the other input.
From the voltage relationship in fig. 12, since R12 and R13 have equal resistance values of 7.5K, the 3-pin voltage of U12 is 1.65V, and the 2-pin voltage of U12 is 1.65V due to the "virtual short" principle of the operational amplifier. The current flowing through R11 is 1.65mA due to the resistance of R11 being 1K, and the current flowing between pins 1 and 2 of the operational amplifier U12 is 1.65mA due to the "virtual break" principle of the operational amplifier. In other embodiments of the apparatus, the resistors R11, R12 and R13 may have other resistances as long as the current input to the bridge RB1 is a constant current. The D + and D-potentials of the bridge are sent to an amplifier 63 for potential difference signal amplification, and the processed V _ OUT voltage signal is sent to a control circuit 10 for processing to obtain the pH value of the facial cleanser to be detected.
Optionally, in another embodiment of the apparatus, please refer to fig. 8, the skin care apparatus further includes a gyroscope module 70, the gyroscope module 70 is disposed in one side of the rotating foam head, the gyroscope module 70 is electrically connected to the control circuit 10, and the gyroscope module 70 is configured to sense a position of the rotating foam head and send the position information to the control circuit 10. When the rotating foam head foams, the gyroscope module 70 sends the position information to the control circuit 10 after sensing different positions of the human face where the rotating foam head is located, and the control circuit 10 can start different working modes according to the different positions, for example, increasing the foam-making amount near the forehead and the like.
Optionally, in another embodiment of the apparatus, referring to fig. 8, the skin care apparatus further includes a key circuit 90, an indication circuit 100, and a wireless communication circuit 110, and the key circuit 90, the indication circuit 100, and the wireless communication circuit 110 are respectively electrically connected to the control circuit 10.
The key circuit 90 is used for transmitting a key signal to the control circuit 400, and the skin care device can be operated through the key circuit 90. In other embodiments, infrared sensing technology may also be used to operate the skin care device. Indicating circuit 100 can be used for instructing the operating condition of skin care equipment, and indicating circuit 100 can adopt 5 LED pilot lamps, and through the bright or go of control circuit 10 output high level or low level control LED lamp, for example, show the charged state with the red light, the green light shows WIFI operating condition, the yellow light shows the skin matter test condition, the blue light shows skin care operating condition and the yellow green light shows the working condition of beating the foam etc.. The wireless communication circuit 110 can be realized by adopting a WIFI chip or a Bluetooth communication scheme, wireless communication is carried out between the communication circuit 110 and a communication terminal such as a mobile phone, various functions of skin care equipment can be controlled and realized on an application interface of the communication terminal, meanwhile, data used by a user can also be uploaded to the communication terminal through the communication circuit 110, storage of user information is realized on the communication terminal, the user can check conveniently, and user experience is enhanced.
Optionally, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth switch tube, the seventh switch tube, and the eighth switch tube may be any one of a high-voltage triode, an MOS tube, or an IGBT switch device. When the switch tube is an MOS tube, the first end is a grid electrode, the second end is a drain electrode, and the third end is a source electrode.
It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above features are combined with each other to form various embodiments not listed above, and all of them are considered as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

Claims (14)

1. A skin care device, characterized in that the skin care device comprises a control circuit, a skin measurement circuit, a skin care circuit, an oscillating piece and a skin contact piece;
the control circuit is respectively electrically connected with the skin test circuit and the skin care circuit and is used for sending a test signal to the skin test circuit and sending a driving signal to the skin care circuit;
the skin test circuit is used for receiving the test signal sent by the control circuit, processing the signal of the test signal after passing through the skin of a human body, and sending the signal to the control circuit, and the control circuit is also used for receiving and processing the signal sent by the skin test circuit to obtain a skin test result;
the skin care device comprises an oscillating piece, a skin care circuit and a control circuit, wherein the oscillating piece is connected with the output end of the skin care circuit, the skin contact piece for caring skin is fixed on the oscillating piece, and the skin care circuit is used for receiving a driving signal of the control circuit and processing the signal so as to drive the oscillating piece to vibrate by the processed signal.
2. A skin care device as claimed in claim 1, characterized in that the skin measuring circuit comprises a first skin contact, a second skin contact, a differentiating circuit, a voltage follower circuit and a filter circuit;
the skin contact is electrically connected with the output end of the control circuit, the second skin contact is electrically connected with the input end of the differential circuit, the output end of the differential circuit is electrically connected with the input end of the voltage follower circuit, the output end of the voltage follower circuit is electrically connected with one end of the filter circuit, and the other end of the filter circuit is electrically connected with the input end of the control circuit.
3. The skin care device of claim 1 or 2, wherein the skin care circuit comprises a first switch tube, a first resistor, a transformer and a voltage sampling circuit, a first end of the first switch tube is electrically connected to an output end of the control circuit through the first resistor, a second end of the first switch tube is electrically connected to a primary side of the transformer, a secondary side of the transformer is electrically connected to the oscillating element, a third end of the first switch tube is electrically connected to an input end of the voltage sampling circuit, and an output end of the voltage sampling circuit is electrically connected to an input end of the control circuit.
4. A skin care device according to claim 3, wherein the skin care circuit further comprises a first low pass filter circuit electrically connected between the voltage sampling circuit and an input of the control circuit.
5. The skin care device of claim 1, further comprising a foam generating unit comprising a motor drive circuit, a motor, and a rotating foam head;
the input end of the motor driving circuit is electrically connected with the control circuit, the output end of the motor driving circuit is electrically connected with the motor, the motor driving circuit is used for driving the motor to move forwards and backwards, and the motor is connected with the rotary foam head and used for driving the rotary foam head to rotate.
6. A skin care device as defined in claim 5, wherein the motor drive circuit comprises:
the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth switch tube, the seventh switch tube, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor and the ninth resistor;
the first end of the second switching tube is electrically connected with the control circuit through a second resistor, the second end of the second switching tube is electrically connected with a fourth power supply voltage through a third resistor and a fourth resistor in sequence, the third end of the second switching tube is electrically connected with the second power supply voltage, the common connecting end of the third resistor and the fourth resistor is electrically connected with the first end of a fourth switching tube, the third end of the fourth switching tube is connected with the fourth power supply voltage, the second end of the fourth switching tube is electrically connected with the second end of a fifth switching tube, and the third end of the fifth switching tube is connected with the second power supply voltage;
the first end of the third switching tube is electrically connected with the control circuit through a fifth resistor, the second end of the third switching tube is connected with a fourth power supply voltage through a sixth resistor and a seventh resistor in sequence, the third end of the third switching tube is connected with the second power supply voltage, the common connecting end of the sixth resistor and the seventh resistor is electrically connected with the first end of the sixth switching tube, the third end of the sixth switching tube is connected with the fourth power supply voltage, the second end of the sixth switching tube is electrically connected with the second end of the seventh switching tube, and the third end of the seventh switching tube is connected with the second power supply voltage;
the first end of the fifth switching tube is electrically connected with the control circuit through an eighth resistor, and the first end of the seventh switching tube is electrically connected with the control circuit through a ninth resistor;
and the common connecting end of the fourth switching tube and the fifth switching tube and the common connecting end of the sixth switching tube and the seventh switching tube are respectively used as the input ends of the motor.
7. The skin care device of claim 6, wherein the motor driving circuit further comprises a second voltage sampling circuit, the second voltage sampling circuit comprises a tenth resistor and a second low-pass filter circuit, one end of the tenth resistor is connected to the second power voltage, the other end of the tenth resistor is electrically connected to the common connection end of the fifth switching tube and the seventh switching tube and the input end of the second low-pass filter circuit, and the output end of the second low-pass filter circuit is electrically connected to the control circuit.
8. The skin treatment apparatus of claim 5, further comprising a pH detection circuit, wherein the pH detection circuit comprises a constant current source circuit, a pH electrode, and an amplifier, wherein the pH electrode is disposed within the rotating foam head, the constant current source circuit is electrically connected to an input of the pH electrode for providing a constant current to the pH electrode, an output of the pH electrode is electrically connected to an input of the amplifier, and an output of the amplifier is electrically connected to the control circuit.
9. The skin care device according to claim 8, wherein the constant current source circuit includes a first voltage dividing circuit, an eleventh resistor, and an operational amplifier, wherein the input terminals of the first voltage dividing circuit are connected to the first power supply voltage and the second power supply voltage, respectively, the output terminal of the first voltage dividing circuit is connected to the non-inverting input terminal of the operational amplifier, the power supply terminals of the operational amplifier are connected to the second power supply voltage and the first power supply voltage, one terminal of the eleventh resistor is connected to the second power supply voltage, the other terminal is connected to the inverting input terminal of the operational amplifier and one input terminal of the PH electrode, respectively, and the output terminal of the operational amplifier is connected to the other input terminal of the PH electrode.
10. The skin care device of claim 5, further comprising a power circuit and a voltage boost circuit, the power circuit being electrically connected to the control circuit, the skin care circuit and the voltage boost circuit, respectively, the power circuit being configured to power the control circuit and the skin care circuit and to provide power to the voltage boost circuit, the voltage boost circuit being connected to the foam generating unit for powering the foam generating unit.
11. The skin care device of claim 10, wherein the power circuit comprises a charge management circuit, a rechargeable battery, a first diode, a second diode, and a voltage reduction circuit, a first end of the rechargeable battery is electrically connected to the second supply voltage, a second end of the rechargeable battery is electrically connected to the third supply voltage through the charge management circuit, and is electrically connected to an anode of the first diode, a cathode of the first diode is electrically connected to a cathode of the second diode and to the voltage reduction circuit, and an anode of the second diode is connected to the third supply voltage;
the output end of the voltage reduction circuit is used as the first output end of the power supply circuit to output a first power supply voltage, the common connection end of the first diode and the second diode is used as the second output end of the power supply circuit to be connected with the voltage boost circuit, and the voltage boost circuit outputs a fourth power supply voltage.
12. The skin care device of claim 11, wherein the power circuit further comprises a second voltage divider circuit, a first input of the second voltage divider circuit being electrically connected to the third power voltage, a second input of the second voltage divider circuit being electrically connected to the second power voltage, and an output of the second voltage divider circuit serving as a charging state detection terminal of the rechargeable battery being electrically connected to the control circuit.
13. The skin care device of claim 5, further comprising a gyroscope module, the gyroscope module being disposed inside one side of the rotating foam head, the gyroscope module being electrically connected to the control circuit, the gyroscope module being configured to sense a position of the rotating foam head and to send the position information to the control circuit.
14. The skin care device of claim 1, further comprising a key circuit, an indication circuit, and a wireless communication circuit, each electrically connected to the control circuit.
CN201721048962.XU 2017-08-21 2017-08-21 Skin care equipment Active CN211381285U (en)

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CN201721048962.XU CN211381285U (en) 2017-08-21 2017-08-21 Skin care equipment

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114424897A (en) * 2022-01-12 2022-05-03 杭州涂鸦信息技术有限公司 Pore cleaning instrument and pore cleaning control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114424897A (en) * 2022-01-12 2022-05-03 杭州涂鸦信息技术有限公司 Pore cleaning instrument and pore cleaning control method

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Effective date of registration: 20221101

Address after: 1010-1011, 10 / F, block D, Shenzhen Aerospace Science and Technology Innovation Research Institute building, no.6, Keji south 10 road, high tech South Zone, Nanshan District, Shenzhen, Guangdong 518000

Patentee after: SHENZHEN H&T INTELLIGENT CONTROL Co.,Ltd.

Address before: 1002, 10 / F, block D, Shenzhen Aerospace Science and Technology Innovation Research Institute building, no.6, Keji south 10 road, high tech South Zone, Nanshan District, Shenzhen, Guangdong 518000

Patentee before: SHENZHEN H&T SMART HOME TECHNOLOGY Co.,Ltd.