Temperature-control voltage-control charging neck massage instrument control circuit

Abstract

The utility model discloses a control circuit of a temperature-control voltage-control charging neck massage instrument. The utility model relates to a massage device which comprises a main control chip, a charging management circuit, a Hall detection circuit, a massage driving circuit, a heating circuit, a switch circuit and a mode display circuit, and the charging management circuit, the Hall detection circuit, the massage driving circuit, the heating circuit, the switch circuit and the mode display circuit are all connected with the main control chip. The charging management circuit comprises a rechargeable battery, a battery management chip, an NTC detection circuit and a voltage stabilizing circuit, the rechargeable battery, the NTC detection circuit and the voltage stabilizing circuit are all connected with the battery management chip, the main control chip, the Hall detection circuit and the mode display circuit are all connected with the voltage stabilizing circuit, and the massage driving circuit and the heating circuit are all connected with the rechargeable battery. The beneficial effects of the utility model are that the temperature change of the rechargeable battery in the charging process is detected; the working state of the neck massage instrument is known; real-time temperature control can be carried out, and safety and reliability are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of neck massagers, and in particular to a control circuit for a temperature-controlled, voltage-boosting, charging neck massager. Background Technology

[0002] With the fast pace of modern life, people spend long hours working or studying in the same posture, leading to increasingly common problems such as neck muscle fatigue, stiffness, and even cervical spondylosis. Neck massagers, as a convenient health management tool, are gradually being accepted by the public. They not only relieve neck muscle tension and pain but also promote blood circulation and improve sleep quality, thus driving a continuous increase in market demand.

[0003] The technological development of neck massagers has evolved from simple to complex, and from single-function to multi-function. Early neck massagers mainly used simple methods such as mechanical vibration or pulsed current for massage, with relatively simple functions. With the rapid advancement of electronic technology and mechanical manufacturing, neck massagers have gradually incorporated more intelligent elements and advanced technologies. For example, some high-end products have begun to use intelligent sensors and microprocessors, which can automatically adjust the massage intensity and mode according to the user's muscle tension; the application of wireless charging and Bluetooth connectivity technologies has also made massagers more portable and easier to operate. However, existing neck massagers often suffer from poor temperature control during charging, leading to abnormal temperatures that affect the overall safety and lifespan of the massager. Utility Model Content

[0004] The present invention aims to overcome the aforementioned deficiencies in the prior art by providing a temperature-controlled, voltage-boosting, charging neck massager control circuit capable of real-time temperature control to improve safety and reliability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A control circuit for a temperature-controlled, voltage-boosting, and rechargeable neck massager includes a main control chip, a charging management circuit, a Hall effect detection circuit, a massage drive circuit, a heating circuit, a switching circuit, and a mode display circuit. The charging management circuit, Hall effect detection circuit, massage drive circuit, heating circuit, switching circuit, and mode display circuit are all connected to the main control chip. The charging management circuit includes a rechargeable battery, a battery management chip, an NTC detection circuit, and a voltage regulator circuit. The rechargeable battery, NTC detection circuit, and voltage regulator circuit are all connected to the battery management chip. The main control chip, Hall effect detection circuit, and mode display circuit are all connected to the voltage regulator circuit. The massage drive circuit and heating circuit are both connected to the rechargeable battery.

[0007] The charging management circuit includes a voltage regulator circuit that provides a stable voltage source for the entire control circuit; an NTC detection circuit that detects temperature changes in the battery during charging and controls the charging status through a battery management chip to achieve temperature control; a Hall effect detection circuit that monitors the operating status of the massage motor in the massage drive circuit; a massage drive circuit that controls the forward and reverse rotation of the massage motor; a heating circuit that heats the neck massager to provide a suitable temperature for neck massage; a switching circuit for starting, stopping, and selecting modes; and a mode display circuit that provides a clear view of the neck massager's operating status. This structural design achieves real-time temperature control, improving safety and reliability.

[0008] Preferably, the charging management circuit further includes a TYPE-C interface and an interface circuit, wherein the TYPE-C interface is connected to the battery management chip through the interface circuit.

[0009] Preferably, the Hall detection circuit includes a Hall sensor, a first resistor, and a second resistor. The positive terminal of the Hall sensor is connected to the output terminal of the voltage regulator circuit, and the negative terminal of the Hall sensor is connected to the main control chip after passing through the first resistor and the second resistor. The Hall sensor is installed at the location of the massage drive circuit.

[0010] Preferably, the massage drive circuit includes a massage motor, a forward drive circuit, and a reverse drive circuit. The massage motor is connected to the main control chip through the forward drive circuit, and the massage motor is connected to the main control chip through the reverse drive circuit.

[0011] Preferably, the heating circuit includes a heating element, a current-limiting resistor, a pull-down resistor, and a MOSFET. The positive terminal of the heating element is connected to the rechargeable battery, the negative terminal of the heating element is connected to the source of the MOSFET, the gate of the MOSFET is connected to the main control chip through the current-limiting resistor, one end of the pull-down resistor is connected between the current-limiting resistor and the gate of the MOSFET, and the other end of the pull-down resistor and the drain of the MOSFET are both grounded.

[0012] Preferably, the switching circuit includes a power switch, a mode switch, and a heating switch, all of which are connected to the main control chip.

[0013] Preferably, the mode display circuit includes a switch indicator light, a mode indicator light, and a heating indicator light, all of which are connected to the main control chip.

[0014] Preferably, the NTC detection circuit includes an NTC thermistor, a third resistor, and a fourth resistor. One end of the NTC thermistor and one end of the third resistor are grounded, and the other end of the NTC thermistor and one end of the fourth resistor are connected. The other ends of the third resistor and the fourth resistor are both connected to the main control chip. The NTC thermistor is installed at the location of the rechargeable battery.

[0015] Preferably, the system also includes an alarm circuit, which includes a buzzer and a fifth resistor. One end of the buzzer is connected to the main control chip through the fifth resistor, and the other end of the buzzer is grounded.

[0016] The beneficial effects of this utility model are: it detects the temperature change of the rechargeable battery during the charging process and controls the charging status through the battery management chip to achieve the purpose of temperature control; it allows for an intuitive understanding of the working status of the neck massager; and it achieves the goal of improving safety and reliability through real-time temperature control. Attached Figure Description

[0017] Figure 1 This is a circuit block diagram of this utility model;

[0018] Figure 2 This is the circuit schematic diagram of this utility model.

[0019] In the diagram: 1. Main control chip, 2. NTC detection circuit, 3. Voltage regulator circuit, 4. Rechargeable battery, 5. Battery management chip, 6. Interface circuit, 7. TYPE-C interface, 8. Hall effect detection circuit, 9. Massage drive circuit, 10. Heating circuit, 11. Switch circuit, 12. Mode display circuit, 13. Alarm circuit, 14. Charging management circuit. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 , Figure 2In the described embodiment, a temperature-controlled, voltage-boosting, and charging neck massager control circuit includes a main control chip 1, a charging management circuit 14, a Hall effect detection circuit 8, a massage drive circuit 9, a heating circuit 10, a switching circuit 11, and a mode display circuit 12. The charging management circuit 14, Hall effect detection circuit 8, massage drive circuit 9, heating circuit 10, switching circuit 11, and mode display circuit 12 are all connected to the main control chip 1. The charging management circuit 14 includes a rechargeable battery 4, a battery management chip 5, an NTC detection circuit 2, and a voltage regulator circuit 3. The rechargeable battery 4, NTC detection circuit 2, and voltage regulator circuit 3 are all connected to the battery management chip 5. The main control chip 1, Hall effect detection circuit 8, and mode display circuit 12 are all connected to the voltage regulator circuit 3. The massage drive circuit 9 and heating circuit 10 are both connected to the rechargeable battery 4. The charging management circuit 14 also includes a TYPE-C interface 7 and an interface circuit 6. The TYPE-C interface 7 is connected to the battery management chip 5 through the interface circuit 6.

[0022] The Hall detection circuit 8 includes a Hall sensor, a first resistor, and a second resistor. The positive terminal of the Hall sensor is connected to the output terminal of the voltage regulator circuit 3, and the negative terminal of the Hall sensor is connected to the main control chip 1 through the first resistor and the second resistor. The Hall sensor is installed at the location of the massage drive circuit 9.

[0023] The massage drive circuit 9 includes a massage motor, a forward drive circuit, and a reverse drive circuit. The massage motor is connected to the main control chip 1 through the forward drive circuit, and the massage motor is connected to the main control chip 1 through the reverse drive circuit.

[0024] The heating circuit 10 includes a heating element, a current-limiting resistor, a pull-down resistor, and a MOSFET. The positive terminal of the heating element is connected to the rechargeable battery 4, and the negative terminal of the heating element is connected to the source of the MOSFET. The gate of the MOSFET is connected to the main control chip 1 through the current-limiting resistor. One end of the pull-down resistor is connected between the current-limiting resistor and the gate of the MOSFET, and the other end of the pull-down resistor and the drain of the MOSFET are both grounded.

[0025] The switching circuit 11 includes a power switch, a mode switch, and a heating switch, all of which are connected to the main control chip 1.

[0026] The mode display circuit 12 includes a switch indicator light, a mode indicator light, and a heating indicator light, all of which are connected to the main control chip 1.

[0027] The NTC detection circuit 2 includes an NTC thermistor, a third resistor, and a fourth resistor. One end of the NTC thermistor and one end of the third resistor are grounded. The other end of the NTC thermistor and one end of the fourth resistor are connected. The other ends of the third resistor and the fourth resistor are both connected to the main control chip 1. The NTC thermistor is installed at the location of the rechargeable battery 4.

[0028] It also includes an alarm circuit 13, which includes a buzzer and a fifth resistor. One end of the buzzer is connected to the main control chip 1 through the fifth resistor, and the other end of the buzzer is grounded.

[0029] The specific circuit principle is as follows: Figure 2 As shown, a 5V DC wired charging method is used, with charging via a TYPE-C interface. Charging management is handled by the battery management chip (U2), which boosts the voltage of two 7.4V rechargeable batteries and three 12V rechargeable batteries. The battery management chip (U2) performs boost charging: it integrates a Boost synchronous boost charging controller with a switching frequency of 500kHz, boosting the output voltage to 8.4V to charge the dual-cell lithium / lithium-ion batteries; with a 5V input and an 8.0V / 1.2A output, the efficiency is 93%.

[0030] Charging principle: When the dual-cell rechargeable battery voltage is less than 3.7V, it is charged with a current of 50mA; when the voltage is greater than 3.7V but less than 6V, it is charged with a current of 100mA; when the voltage is greater than 6V, it is charged with a constant current ICC; when the battery voltage approaches 8.4V, it enters constant voltage charging mode. In constant voltage mode, if the charging current is less than 200mA, charging stops after 30 seconds, and the battery voltage is checked to see if it is higher than the stopping voltage. If it is higher, charging stops; if it is lower, charging continues, and the check resumes after another 30 seconds. After the battery is fully charged and charging stops, if the input remains and the battery voltage is less than 8V, charging will restart. All the above threshold values ​​are preset thresholds built into the battery management chip (U2).

[0031] Battery protection principle: Integrated protection functions include output overcurrent, input undervoltage, overvoltage, and overtemperature protection; an input VIN voltage regulation loop automatically adjusts and reduces the charging current when the input voltage approaches the 4.5V undervoltage threshold, ensuring the input voltage remains stable near the undervoltage threshold and preventing adapter failure; input overvoltage protection stops charging when the input voltage exceeds the 5.75V overvoltage threshold; NTC detection function, in conjunction with an NTC thermistor, detects the battery temperature and stops charging when the battery temperature is too high or too low; overtemperature protection forcibly stops charging when the temperature exceeds 135 degrees Celsius.

[0032] The battery management chip (U2) is connected to an NTC detection circuit (third resistor R3, fourth resistor R4, NTC thermistor RT): A 20uA current is discharged through the NTC thermistor pin, and the voltage generated across the NTC thermistor by this current is detected to determine the temperature. When the detected temperature exceeds the set temperature, charging is stopped. When the detected voltage is between 0.56V and 1.32V, the battery temperature is normal, and charging continues normally. When the detected voltage is between 0.43V and 0.56V, the battery temperature is too high, and the charging current is reduced by half. When the detected voltage drops below 0.43V, the battery temperature is too high, and charging stops. When the detected voltage rises above 1.32V, the battery temperature is too low, and charging stops.

[0033] The voltage regulator circuit has two voltage regulator chips: one is a 3V output voltage regulator chip (U5), which mainly powers the mode indicator LM lamp group, and the other is a 5V output voltage regulator chip (U1), which mainly powers the main control chip and the Hall detection circuit.

[0034] The Hall effect detection circuit has a 5V power supply at the positive terminal, a ground wire, and an output terminal (second resistor R39, first resistor R03). The main function of the Hall sensor is to detect the number of revolutions of the massage motor during operation. When the number of revolutions reaches the set value, it will enter the next mode.

[0035] The heating circuit is controlled by a field-effect transistor (MOSFET). The positive terminal is a directly rechargeable battery, and the negative terminal is controlled by the main control chip (U0) outputting a high level, which, through the current-limiting resistor (R12) and the pull-down resistor (R11), turns on the MOSFET (Q1) and starts heating.

[0036] The massage motor is driven by the main control chip (U0), which controls the start and stop of the positive field-effect transistor of the massage motor (the forward drive circuit consists of R22, R21, Q4, R18, R17, R14, R13, and U3). Similarly, the negative field-effect transistor of the massage motor is controlled by the main control chip (U0) to start and stop (the reverse drive circuit consists of R24, R23, Q3, R20, R19, R16, R15, and U4), thereby realizing the forward and reverse rotation and frequency of the motor.

[0037] The principle of this control circuit is as follows: Press and hold the power switch S1 to turn on the power switch indicator LO until it is constantly lit, and the massage motor is turned on; press the mode switch S2 to switch modes, and the three different mode indicator lights LM will be constantly lit green; after pressing the fourth mode, the massage motor stops, the heating function starts heating, and the red light will be constantly lit; when the heating switch S3 is pressed briefly, the heating mode is turned on. There are two heating modes: mode one is low temperature heating, and the heating indicator light LH will be constantly lit green; mode two is high temperature heating, and the heating indicator light LH will be constantly lit red.

Claims

1. A control circuit for a temperature-controlled, voltage-boosting, charging neck massager, characterized in that, The system includes a main control chip (1), a charging management circuit (14), a Hall effect detection circuit (8), a massage drive circuit (9), a heating circuit (10), a switch circuit (11), and a mode display circuit (12). The charging management circuit (14), the Hall effect detection circuit (8), the massage drive circuit (9), the heating circuit (10), the switch circuit (11), and the mode display circuit (12) are all connected to the main control chip (1). The charging management circuit (14) includes a rechargeable battery (4), a battery management chip (5), an NTC detection circuit (2), and a voltage regulator circuit (3). The rechargeable battery (4), the NTC detection circuit (2), and the voltage regulator circuit (3) are all connected to the battery management chip (5). The main control chip (1), the Hall effect detection circuit (8), and the mode display circuit (12) are all connected to the voltage regulator circuit (3). The massage drive circuit (9) and the heating circuit (10) are both connected to the rechargeable battery (4).

2. The control circuit for a temperature-controlled, voltage-boosting, charging neck massager according to claim 1, characterized in that, The charging management circuit (14) further includes a TYPE-C interface (7) and an interface circuit (6), wherein the TYPE-C interface (7) is connected to the battery management chip (5) through the interface circuit (6).

3. The control circuit for a temperature-controlled, voltage-boosting, charging neck massager according to claim 1, characterized in that, The Hall detection circuit (8) includes a Hall sensor, a first resistor and a second resistor. The positive terminal of the Hall sensor is connected to the output terminal of the voltage regulator circuit (3). The negative terminal of the Hall sensor is connected to the main control chip (1) after passing through the first resistor and the second resistor. The Hall sensor is installed at the location of the massage drive circuit (9).

4. The control circuit for a temperature-controlled, voltage-boosting, charging neck massager according to claim 1, characterized in that, The massage drive circuit (9) includes a massage motor, a forward drive circuit and a reverse drive circuit. The massage motor is connected to the main control chip (1) through the forward drive circuit and the massage motor is connected to the main control chip (1) through the reverse drive circuit.

5. The control circuit for a temperature-controlled, voltage-boosting, charging neck massager according to claim 1, characterized in that, The heating circuit (10) includes a heating element, a current-limiting resistor, a pull-down resistor, and a MOS transistor. The positive terminal of the heating element is connected to the rechargeable battery (4), the negative terminal of the heating element is connected to the source of the MOS transistor, the gate of the MOS transistor is connected to the main control chip (1) through the current-limiting resistor, one end of the pull-down resistor is connected between the current-limiting resistor and the gate of the MOS transistor, and the other end of the pull-down resistor and the drain of the MOS transistor are both grounded.

6. The control circuit for a temperature-controlled, voltage-boosting, charging neck massager according to claim 1, characterized in that, The switching circuit (11) includes a power switch, a mode switch and a heating switch, all of which are connected to the main control chip (1).

7. The control circuit for a temperature-controlled, voltage-boosting, charging neck massager according to claim 1, characterized in that, The mode display circuit (12) includes a switch indicator light, a mode indicator light and a heating indicator light, all of which are connected to the main control chip (1).

8. The control circuit for a temperature-controlled, voltage-boosting, charging neck massager according to claim 1, characterized in that, The NTC detection circuit (2) includes an NTC thermistor, a third resistor and a fourth resistor. One end of the NTC thermistor and one end of the third resistor are grounded. The other end of the NTC thermistor and one end of the fourth resistor are connected. The other end of the third resistor and the other end of the fourth resistor are connected to the main control chip (1). The NTC thermistor is installed at the location of the rechargeable battery (4).

9. The control circuit for a temperature-controlled, voltage-boosting, charging neck massager according to claim 1, characterized in that, It also includes an alarm circuit (13), which includes a buzzer and a fifth resistor. One end of the buzzer is connected to the main control chip (1) through the fifth resistor, and the other end of the buzzer is grounded.

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