CN216455987U

CN216455987U - Control circuit of head massager

Info

Publication number: CN216455987U
Application number: CN202122772930.7U
Authority: CN
Inventors: 杨柳; 杨子明
Original assignee: Shenzhen Goodwind Technology Development Co ltd
Current assignee: Shenzhen Goodwind Technology Development Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-05-10
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a control circuit of a head massager, which comprises: switch module, distance detection module, vibration module, ruddiness produce module and control module, switch module control vibration module vibration when being triggered, when detecting human body signal apart from detection module, control module control ruddiness produces the module and opens, launches the red light, when detecting human body signal not apart from detection module, control module control ruddiness produces the module and stops to launch the ruddiness. When the head massager is used, the infrared light is emitted when the red light sensing module detects that the head massager is close to the skin, the infrared light is stopped being emitted when the head massager is detected to be away from the skin, so that the automatic opening and closing of the infrared light is realized, the effect of saving the electric energy of the battery is achieved, and the curative effects of diminishing inflammation and promoting blood circulation are achieved by irradiating the scalp and the hair follicle through the infrared energy.

Description

Control circuit of head massager

Technical Field

The utility model relates to the technical field of massage equipment, in particular to a control circuit of a head massager.

Background

More and more people are troubled by the phenomenon of hair loss, and people usually massage the scalp with the help of a head massager. However, most of the existing massage instruments generally have a single massage function, which is based on the fact that the existing head massager has a single circuit function, cannot control more functions, and has unstable circuit function, more faults and high maintenance cost.

Thus, the prior art has yet to be improved and enhanced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention is directed to a control circuit of a head massager, which can enrich the functions of the head massager.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a control circuit for a head massager, comprising: switch module, distance detection module, vibration module, ruddiness produce module and control module, distance detection module, vibration module, ruddiness produce the module and all are connected with control module, control module control vibration module vibration when switch module is triggered, when distance detection module detects human body signal, control module control ruddiness produces the module and opens emission ruddiness, when distance detection module detects not human body signal, control module control ruddiness produces the module and stops emission ruddiness.

The control circuit of the head massager further comprises: and the ion wind module is used for outputting positive and negative ions and is connected with the control module.

The control circuit of the head massager, the ion wind module comprises: the grid of the first MOS tube is connected with the ion wind driving end of the control module through the first resistor, the source electrode of the first MOS tube is grounded, the drain electrode of the first MOS tube is connected with the 1 st pin of the ion generator interface, the 2 nd pin of the ion generator interface is connected with the V5V power supply end through the second resistor, the grid of the second MOS tube is connected with the ion wind driving end of the control module through the third resistor, the source electrode of the second MOS tube is grounded, the drain electrode of the second MOS tube is connected with the 1 st pin of the fan interface, and the 2 nd pin of the fan interface is connected with the V5V power supply end through the fourth resistor.

In the control circuit of the head massager, the vibration module includes: the base electrode of the first triode is connected with the motor driving end of the control module through the fifth resistor, the collector electrode of the first triode is connected with the 1 st pin of the motor interface, and the 2 nd pin of the motor interface is connected with the VBAT power supply end through the sixth resistor.

The control circuit of head massager in, distance detection module includes opto-coupler chip, seventh resistance, eighth resistance and ninth resistance, the 3 rd foot of photoelectric sensing ware interface is connected to the 2 nd foot of opto-coupler chip, also through eighth ohmic connection VDD power supply end, still through seventh resistance ground connection, the 4 th foot of feedback end and opto-coupler chip is responded to the distance of the 2 nd foot connection control module of photoelectric sensing ware interface, the 4 th foot of opto-coupler chip passes through ninth ohmic connection VDD power supply end.

In the control circuit of the head massager, the switch module comprises a touch chip, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first touch electrode, a second touch electrode, a third touch electrode and a fourth touch electrode, a pin TP5 of the touch chip is connected with the first touch electrode through the tenth resistor, a pin TP3 of the touch chip is connected with the second touch electrode through the eleventh resistor, a pin TP1 of the touch chip is connected with the third touch electrode through the twelfth resistor, a pin TP0 of the touch chip is connected with the fourth touch electrode through the thirteenth resistor, and a pin TPQ0, a pin TPQ1, a pin TPQ3 and a pin TPQ5 of the touch chip are respectively connected with one switch driving end of the control module.

In the control circuit of the head massager, the red light generating module comprises a red light driving chip, an inductor, a third MOS tube, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor and an eighteenth resistor, wherein a grid electrode of the third MOS tube is connected with a red light driving end of the control module through the fourteenth resistor, a source electrode of the third MOS tube is grounded, a drain electrode of the third MOS tube is connected with one end of the red light lamp unit, a VIN pin of the red light driving chip is connected with a VBAT power supply end, a SW pin of the red light driving chip is connected with one end of the V2.2V power supply end, one end of the fifteenth resistor and one end of the seventeenth resistor through the inductor, an FB pin of the red light driving chip is connected with the other end of the fifteenth resistor and is grounded through the sixteenth resistor, and the other end of the seventeenth resistor is connected with the other end of the red light lamp unit.

The control circuit of the head massager comprises a state indicating module, and the state indicating module is connected with the control module.

The control circuit of the head massager, the state indicating module comprises an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a first indicating lamp, a second indicating lamp, a third indicating lamp and a fourth indicating lamp, wherein the positive pole of the first indicating lamp is connected with the red light indicating driving end of the control module through the eighteenth resistor, the positive pole of the second indicating lamp is connected with the ion wind indicating driving end of the control module through the nineteenth resistor, the positive pole of the third indicating lamp is connected with the motor positive rotation indicating driving end of the control module through the twentieth resistor, the positive pole of the fourth indicating lamp is connected with the motor reverse rotation indicating driving end of the control module through the twenty-first resistor, and the negative pole of the first indicating lamp, the negative pole of the second indicating lamp, the negative pole of the third indicating lamp and the negative pole of the fourth indicating lamp are grounded.

The control circuit of the head massager further comprises a switch module, the switch module comprises a twenty-second resistor and a switch key, one end of the switch key is connected with the switch detection end of the control module and is also connected with the VDD power supply end through the twenty-second resistor, and the other end of the switch key is grounded.

Compared with the prior art, the control circuit of the head massager provided by the utility model comprises: the distance detection module, the vibration module, the red light generation module and the control module are all connected with the control module, the control module controls the vibration module to vibrate when the switch module is triggered, the control module controls the red light generation module to start to emit red light when the distance detection module detects a human body signal, when the distance detection module is used, the red light induction module emits infrared light when detecting that the head massager is close to the skin, and stops emitting the infrared light when detecting that the head massager is away from the skin, so that the automatic opening and closing of the infrared light is realized, the electric energy of the battery is saved, the head massager irradiates to the scalp and the hair follicle through infrared energy to achieve the curative effects of diminishing inflammation and promoting the blood circulation, and meanwhile, the distance detection module can be matched with vibration massage to further massage the head to promote the metabolism of the skin of the head, can be used for preventing alopecia.

Drawings

Fig. 1 is a schematic diagram of a control circuit of the head massager provided by the present invention.

Reference is made to the accompanying drawings in which:

the touch control device comprises a switch module 1, a distance detection module 2, a vibration module 3, a red light generation module 4, a red light lamp unit 41, a control module 5, an ion wind module 6, a state indication module 7, a switch module 8, a first MOS tube Q1, a second MOS tube Q2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first triode Q3, a fifth resistor R5, a sixth resistor R6, an MCU chip U1, an optocoupler chip U1, a seventh resistor R1, an eighth resistor R1, a ninth resistor R1, a touch control chip U1, a tenth resistor R1, an eleventh resistor R1, a twelfth resistor R1, a thirteenth resistor R1, a first P1, a second P1, a third P1, a fourth P1, a red light driving chip P1, an inductor L1, a fourteenth MOS tube Q1, a sixteenth resistor R1, a fifth resistor R1, a fifth resistor 1, a touch control chip R1, a touch control chip P1, a touch control electrode P1, a third touch control electrode P1, a fourth touch control electrode P1, a fifth resistor R1, a, Eighteenth resistor R18, nineteenth resistor R19, twentieth resistor R20, twenty-first resistor R21, first indicator light D1, second indicator light D2, third indicator light D3, fourth indicator light D4, twenty-second resistor R22 and switch button KW1

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" 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 also be present.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

Referring to fig. 1, the control circuit of the head massager provided by the present invention includes: switch module 81, distance detection module 2, vibration module 3, ruddiness produce module 4 and control module 5, distance detection module 2, vibration module 3, ruddiness produce module 4 and all are connected with control module 5.

The red light generating module 4 is used for emitting red light to irradiate the scalp and irradiating the scalp and hair follicle positions by infrared energy to achieve the curative effects of diminishing inflammation, promoting blood circulation, nourishing hair, protecting hair and preventing alopecia. The vibration module 3 is used for vibrating and massaging head acupuncture points on the scalp, plays a role in promoting the metabolism of the head skin and can prevent hair loss.

When the switch module 81 is triggered, the control module 5 controls the vibration module 3 to vibrate, when the distance detection module 2 detects a human body signal, the control module 5 controls the red light generation module 4 to start emitting red light, and when the distance detection module 2 detects no human body signal, the control module 5 controls the red light generation module 4 to stop emitting red light. The automatic on-off of the infrared light is realized, so that the effect of saving the electric energy of the battery is achieved.

Optionally, the control circuit of the head massager of the present invention further comprises an ion wind module 6 for outputting positive and negative ions, wherein the ion wind module 6 is connected to the control module 5, the positive and negative ions are output by the ion wind module 6 in the massage process and blown to the scalp, the positive and negative ions generate huge energy release at the moment of neutralizing the positive and negative charges in the air, so that bacteria die, and the sterilization effect is realized, and the positive and negative ions neutralize the negative and positive ions on the hair, so that the health care effects of removing static electricity, removing odor, relieving hair knots, and promoting blood circulation of the head are provided.

Referring to fig. 1, in the control circuit of the head massager of the present invention, the control module 5 may include an MCU chip U1 with a model of EM78P372NSO20, and the ion wind module 6 includes: the transistor comprises a first MOS transistor Q1, a second MOS transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, wherein the first MOS transistor Q1 and the second MOS transistor Q2 are both N-channel MOS transistors, the MOS transistors are conducted when the gates of the N-channel MOS transistors are high, and the second resistor R2 and the fourth resistor R4 are pull-up resistors.

The gate of the first MOS transistor Q1 is connected to an ion wind driving end of the control module 5 (for example, the 51 st pin of the MCU chip U1) through a first resistor R1, the source of the first MOS transistor Q1 is grounded, the drain of the first MOS transistor Q1 is connected to the 1 st pin of the ionizer interface, the 2 nd pin of the ionizer interface is connected to the V5V power supply end through a second resistor R2, the gate of the second MOS transistor Q2 is connected to the ion wind driving end of the control module 5 through a third resistor R3, the source of the second MOS transistor Q2 is grounded, the drain of the second MOS transistor Q2 is connected to the 1 st pin of the fan interface, and the 2 nd pin of the fan interface is connected to the V5V power supply end through a fourth resistor R4.

When the switch module 81 receives the function of turning on the ion wind, the 51 st pin of the MCU chip U1 outputs a high level to turn on the first MOS transistor Q1 and the second MOS transistor Q2, so that the level of the 1 st pin of the ionizer interface and the level of the 1 st pin of the fan interface are pulled down to start the ionizer and the fan, and the head massager outputs the ion wind.

The vibration module 3 includes: the base of the first triode Q3 is connected to a motor driving end (for example, a 67 th pin of the MCU chip U1) of the control module 5 through a fifth resistor R5, the collector of the first triode Q3 is connected to a 1 st pin of the motor interface, and a 2 nd pin of the motor interface is connected to the VBAT power supply end through a sixth resistor R6. The first triode Q3 is an NPN triode, when the 67 th pin of the MCU chip U1 outputs high level, the 1 st pin of the motor interface is pulled down to low level to enable the motor to vibrate, and scalp massage is achieved.

Distance detection module 2 includes opto-coupler chip U2, seventh resistance R7, eighth resistance R8 and ninth resistance R9, the 3 rd foot of photoelectric sensing L1 inductor interface is connected to opto-coupler chip U2's 2 nd foot, also connect the VDD power supply end through eighth resistance R8, still through seventh resistance R7 ground connection, the 2 nd foot of photoelectric sensing L1 inductor interface is connected the distance response feedback end (like MCU chip U1's 57 th foot) of control module 5 and opto-coupler chip U2's 4 th foot, opto-coupler chip U2's 4 th foot passes through ninth resistance R9 and connects the VDD power supply end. The opto-coupler chip U2 can adopt the opto-coupler of model ITR9909, it mainly plays the effect of signal isolation, when human body signal is sensed to the photoelectric sensing L1 ware of photoelectric sensing L1 ware interface connection, opto-coupler chip U2 output electric signal to MCU chip U1's 57 th foot, MCU chip U1 receives behind the signal, make ruddiness produce module 4 and start output infrared light, when the induction of photoelectric sensing L1 ware is not to human body signal, opto-coupler chip U2 does not export the electric signal, MCU chip U1 makes ruddiness produce module 4 and closes.

The switch module 81 includes a touch chip U3, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a first touch electrode P1, a second touch electrode P2, a third touch electrode P2 and a fourth touch electrode P2, the pin TP 2 of the touch chip U2 is connected to the first touch electrode P2 through the tenth resistor R2, the pin TP 2 of the touch chip U2 is connected to the second touch electrode P2 through the eleventh resistor R2, the pin TP 2 of the touch chip U2 is connected to the third touch electrode P2 through the twelfth resistor R2, the pin TP 2 of the touch chip U2 is connected to the fourth touch electrode P2 through the thirteenth resistor R2, and the pins TPQ 2, pin TPQ 2 and TPQ 2 pin are connected to one switch driving terminal of the control module (e.g., the MCU pins 60, 54, 60, 52, and 2) respectively.

In an alternative embodiment, the touch chip U3 may be an integrated chip of CT8225, and receive touch commands such as red light on, ion wind on, motor forward rotation, motor reverse rotation, etc. output by a user through the first touch electrode P1, the second touch electrode P2, the third touch electrode P13, and the fourth touch electrode P14, respectively.

The red light generating module 4 includes a red light driving chip U4, an inductor L1, a third MOS transistor Q4, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16 and a seventeenth resistor R17, a gate of the third MOS transistor Q4 is connected to a red light driving terminal (for example, the 61 st pin of the MCU chip U1) of the control module 5 through the fourteenth resistor R14, a source of the third MOS transistor Q4 is grounded, a drain of the third MOS transistor Q4 is connected to one end of the red light lamp unit 41, a VIN pin of the red light driving chip U4 is connected to a VBAT power supply terminal, a SW pin of the red light driving chip U4 is connected to a power supply terminal V2.2V through the inductor L1 and one end of the fifteenth resistor R15 and one end of the seventeenth resistor R17, a FB pin of the red light driving chip U4 is connected to the other end of the fifteenth resistor R15 and also to the sixteenth resistor R16, and the other end of the seventeenth resistor R17 is connected to the red light lamp unit 41.

In this embodiment, the red light lamp unit 41 includes 3 to 10 low-energy red light laser lamps, the red light driving chip U4 may be an integrated chip of SC5833, the voltage output by the red light driving chip U4 is boosted by the inductor L1 and then output to the red light lamp unit 41, and the voltage sampling circuit formed by the fifteenth resistor R15 and the sixteenth resistor R16 feeds back the voltage of the red light lamp unit 41 to the FB pin of the red light driving chip U4, and the red light driving chip U4 adjusts the output voltage and current of the SW pin according to the sampling voltage.

The control circuit of the head massager further comprises a state indicating module 7, and the state indicating module 7 is connected with the control module 5 and used for indicating the working state of the head massager.

The status indication module 7 includes an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a first indicator light D1, a second indicator light D2, a third indicator light D3 and a fourth indicator light D4, wherein the first indicator light D1, the second indicator light D2, the third indicator light D3 and the fourth indicator light D4 are white LEDs, and are located at positions of the indicator lights on the head massager body, and corresponding characters or patterns can be printed in a silk-screen manner, and when the indicator lights are turned on, corresponding functions are indicated.

The positive electrode of the first indicator light D1 is connected to the red light indication driving end of the control module 5 (for example, pin 62 of the MCU chip U1) through an eighteenth resistor R18, the positive electrode of the second indicator light D2 is connected to the ion wind indication driving end of the control module 5 (for example, pin 63 of the MCU chip U1) through a nineteenth resistor R19, the positive electrode of the third indicator light D3 is connected to the motor forward rotation indication driving end of the control module 5 (for example, pin 64 of the MCU chip U1) through a twentieth resistor R20, the positive electrode of the fourth indicator light D4 is connected to the motor reverse rotation indication driving end of the control module 5 (for example, pin 65 of the MCU chip U1) through a twenty-first resistor R21, the negative electrode of the first indicator light D1, the negative electrode of the second indicator light D2, the negative electrode of the third indicator light D3, and the negative electrode of the fourth indicator light D4 are grounded.

Further, the control circuit of the head massager disclosed by the utility model further comprises a switch module 81, wherein the switch module 81 comprises a twenty-second resistor R22 and a switch button KW1, one end of the switch button KW1 is connected with a switch detection end (such as a 53 th pin of the MCU chip U1) of the control module 5 and is also connected with a VDD power supply end through a twenty-second resistor R22, the other end of the switch button KW1 is grounded, and when the switch is pressed down, the MCU chip U1 detects that the power-on is interrupted.

In summary, when the control circuit of the head massager provided by the utility model is used, the red light sensing module detects that the head massager emits infrared light when approaching the skin, and detects that the head massager stops emitting infrared light when leaving the skin, so that the infrared light is automatically turned on and off to save the electric energy of the battery, and the scalp and the hair follicle are irradiated by infrared energy to achieve the curative effects of diminishing inflammation and promoting blood circulation.

Furthermore, the control circuit of the head massager also comprises an ion wind device, and the ion wind device blows out ion wind to achieve the health care effects of sterilizing, removing static electricity, removing peculiar smell, relieving hair knots and promoting blood circulation of the head.

In addition, the control circuit of the head massager has the advantages of high control intelligence degree, high response speed, stable performance and low maintenance cost.

It should be understood that the technical solutions and the inventive concepts according to the present invention may be equally replaced or changed by those skilled in the art, and all such changes or substitutions should fall within the protection scope of the appended claims.

Claims

1. A control circuit for a head massager, comprising: switch module, distance detection module, vibration module, ruddiness produce module and control module, distance detection module, vibration module, ruddiness produce the module and all are connected with control module, switch module is triggered the vibration of control module control vibration module, when distance detection module detected human body signal, control module control ruddiness produced the module and opens, launches the red light, when distance detection module detects not human body signal, control module control ruddiness produces the module and stops to launch ruddiness.

2. The control circuit of the head massager of claim 1, further comprising: and the ion wind module is used for outputting positive and negative ions and is connected with the control module.

3. The control circuit of the head massager of claim 2, wherein the ion wind module comprises: the grid of the first MOS tube is connected with the ion wind driving end of the control module through the first resistor, the source electrode of the first MOS tube is grounded, the drain electrode of the first MOS tube is connected with the 1 st pin of the ion generator interface, the 2 nd pin of the ion generator interface is connected with the V5V power supply end through the second resistor, the grid of the second MOS tube is connected with the ion wind driving end of the control module through the third resistor, the source electrode of the second MOS tube is grounded, the drain electrode of the second MOS tube is connected with the 1 st pin of the fan interface, and the 2 nd pin of the fan interface is connected with the V5V power supply end through the fourth resistor.

4. The control circuit of the head massager of claim 3, wherein the vibration module comprises: the base electrode of the first triode is connected with the motor driving end of the control module through the fifth resistor, the collector electrode of the first triode is connected with the 1 st pin of the motor interface, and the 2 nd pin of the motor interface is connected with the VBAT power supply end through the sixth resistor.

5. The control circuit of the head massager as claimed in claim 3, wherein the distance detection module comprises an optical coupling chip, a seventh resistor, an eighth resistor and a ninth resistor, wherein the 2 nd pin of the optical coupling chip is connected with the 3 rd pin of the photoelectric sensor interface, is also connected with the VDD power supply terminal through the eighth resistor and is also grounded through the seventh resistor, the 2 nd pin of the photoelectric sensor interface is connected with the distance sensing feedback terminal of the control module and the 4 th pin of the optical coupling chip, and the 4 th pin of the optical coupling chip is connected with the VDD power supply terminal through the ninth resistor.

6. The control circuit of the head massager as claimed in claim 3, wherein the switch module comprises a touch chip, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first touch electrode, a second touch electrode, a third touch electrode and a fourth touch electrode, wherein the pin TP5 of the touch chip is connected to the first touch electrode through the tenth resistor, the pin TP3 of the touch chip is connected to the second touch electrode through the eleventh resistor, the pin TP1 of the touch chip is connected to the third touch electrode through the twelfth resistor, the pin TP0 of the touch chip is connected to the fourth touch electrode through the thirteenth resistor, and the pins TPQ0, TPQ1, TPQ3 and TPQ5 of the touch chip are respectively connected to one switch driving terminal of the control module.

7. The control circuit of the head massager as claimed in claim 3, wherein the red light generating module comprises a red light driving chip, an inductor, a third MOS transistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor and an eighteenth resistor, a gate of the third MOS transistor is connected to the red light driving terminal of the control module through the fourteenth resistor, a source of the third MOS transistor is grounded, a drain of the third MOS transistor is connected to one end of the red light unit, a VIN pin of the red light driving chip is connected to the VBAT power supply terminal, a SW pin of the red light driving chip is connected to V2.2V power supply terminal through the inductor and to one end of the fifteenth resistor and one end of the seventeenth resistor, an FB pin of the red light driving chip is connected to the other end of the fifteenth resistor and also to the ground through the sixteenth resistor, and the other end of the seventeenth resistor is connected to the other end of the red light unit.

8. The control circuit of the head massager of claim 3 further comprising a status indication module, wherein the status indication module is connected to the control module.

9. The control circuit of the head massager according to claim 8, wherein the status indicating module comprises an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a first indicator light, a second indicator light, a third indicator light and a fourth indicator light, wherein the positive electrode of the first indicator light is connected with the red light indicating driving end of the control module through the eighteenth resistor, the positive electrode of the second indicator light is connected with the ionic wind indicating driving end of the control module through the nineteenth resistor, the positive electrode of the third indicator light is connected with the motor forward rotation indicating driving end of the control module through the twentieth resistor, the positive electrode of the fourth indicator light is connected with the motor reverse rotation indicating driving end of the control module through the twenty-first resistor, and the negative electrode of the first indicator light, the negative electrode of the second indicator light, the negative electrode of the third indicator light and the negative electrode of the fourth indicator light are grounded.

10. The control circuit of the head massager as claimed in claim 9, further comprising a switch module, wherein the switch module comprises a twenty-second resistor and a switch button, one end of the switch button is connected to the switch detection terminal of the control module and also connected to the VDD power supply terminal through the twenty-second resistor, and the other end of the switch button is grounded.