Convenient electric blanket

Abstract

The application relates to a convenient electric blanket, which comprises an electric blanket body and a power supply device; the power supply device comprises a power plug, a master control module and a first interface; the master control module comprises a master control circuit, an output control circuit, a voltage conversion circuit and a first communication power supply circuit for power supply and signal transmission; the first interface is provided with first to third conductive terminals; the electric blanket body is provided with a controller, the controller is provided with a signal processing circuit, a function button circuit, a second interface which is pluggable to the first interface, and a second communication power supply circuit for separating the power supply and the signal provided by the master control end; the first interface and the second interface are connected; the third conductive terminal is connected to the sixth conductive terminal; the first conductive terminal is connected to the fourth conductive terminal; and the second conductive terminal is connected to the fifth conductive terminal; the application brings convenience for use; only three sockets are needed at the interface connection position, the number of power supply lines is reduced, the overall circuit is simplified, and the circuit cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of electric blanket technology, and in particular to a convenient electric blanket. Background Technology

[0002] An electric blanket, also known as an electric mattress pad, is a contact-type electric heating appliance. It incorporates specially designed, high-insulation, soft-cord heating elements woven or sewn into the blanket in a serpentine pattern, emitting heat when electricity is applied. Other appliances with similar working principles and structures to electric blankets include warm compress blankets, electric mattress pads, and electric heating mats.

[0003] Existing electric blankets generally consist of the electric blanket body and a power adapter for power supply. The function buttons for controlling the working status of the electric blanket body are usually located on the power adapter. The power adapter and the electric blanket body are often connected by a power cord. Users often need to walk to the power adapter to use the electric blanket, which is inconvenient. In addition, the connection between the power adapter and the electric blanket body usually involves two power lines and two signal lines for electrical connection, resulting in high circuit costs.

[0004] Therefore, in this patent application, the applicant has carefully researched and developed an easy-to-use electric blanket to solve the above-mentioned problems. Summary of the Invention

[0005] The present invention addresses the shortcomings of the prior art by providing a convenient electric blanket that offers ease of use. Furthermore, the interface connection requires only three plugs, reducing the number of power cords, simplifying the overall circuitry, and lowering circuit costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An easy-to-use electric blanket includes an electric blanket body and a power supply device for power supply and control.

[0008] The power supply device includes a power plug for electrical connection to AC mains power, a main control module for voltage conversion and control, and a first interface for electrical connection to the electric blanket body.

[0009] The main control module includes a main control circuit, an output control circuit, a voltage conversion circuit for converting AC mains power, and a first communication power supply circuit for power supply and signal transmission / reception. The main control circuit is electrically connected to the output control circuit and the first communication power supply circuit. The output control circuit has an N3 terminal, the first communication power supply circuit has a COMM1 terminal and a GND1 terminal, and the first interface has a first conductive terminal to a third conductive terminal. The third conductive terminal is electrically connected to the N3 terminal, the first conductive terminal is electrically connected to the COMM1 terminal, and the second conductive terminal is electrically connected to the GND1 terminal.

[0010] The outer side of the electric blanket body is provided with a controller and a second interface that can be plugged into the first interface. The controller is provided with a signal processing circuit, a function button circuit, and a second communication power supply circuit for separating the power and signal provided by the main control terminal. The signal processing circuit is electrically connected to the function button circuit and the second communication power supply circuit respectively. The second communication power supply circuit has a COMM2 terminal and a GND2 terminal.

[0011] The second interface has a sixth to a fifth conductive terminal, the fourth conductive terminal is electrically connected to the COMM2 terminal, and the fifth conductive terminal is electrically connected to the GND2 terminal; a heating load is provided inside the electric blanket body, one end of the heating load is electrically connected to the sixth conductive terminal, and the other end of the heating load is electrically connected to the fifth conductive terminal;

[0012] The first interface and the second interface are connected, the third conductive terminal is electrically connected to the sixth conductive terminal, the first conductive terminal is electrically connected to the fourth conductive terminal, and the second conductive terminal is electrically connected to the fifth conductive terminal.

[0013] As a preferred embodiment, the signal processing circuit includes a processing chip U4, which has processing pins 1 to 16.

[0014] Processing pin 3 and processing pin 4 are electrically connected to the second communication power supply circuit, and processing pin 1, processing pin 2, processing pin 6, processing pin 14, processing pin 15 and processing pin 16 are all electrically connected to the function key circuit.

[0015] As a preferred embodiment, the second communication power supply circuit includes a resistor R22, a BAV99 chip, a polarized capacitor C7, a resistor R23, a resistor R24, a MOSFET Q6, and a resistor R25.

[0016] Pin 3 of chip BAV99 is the COMM2 terminal, pin 1 of chip BAV99 is the GND2 terminal and grounded, pin 2 of chip BAV99 outputs +4.4V voltage, the positive terminal of polarized capacitor C7 is electrically connected to pin 2 of chip BAV99, the negative terminal of polarized capacitor C7 is grounded, and resistor R22 is connected in parallel to the positive and negative terminals of polarized capacitor C7.

[0017] The drain of MOSFET Q6 is electrically connected to pin 3 of the BAV99 chip. The signal processing circuit is electrically connected to the drain of MOSFET Q6 through resistor R23. The signal processing circuit is also grounded through resistor R24. The source of MOSFET Q6 is grounded. The gate of MOSFET Q6 is electrically connected to the signal processing circuit. The gate of MOSFET Q6 is also grounded through resistor R25.

[0018] As a preferred embodiment, the main control circuit includes a main control chip U3, an indicator LED1, and a resistor R12. The main control chip U3 has main control pins 1 to 20.

[0019] Main control pin 11 is electrically connected to the cathode of indicator LED1 through resistor R12. The anode of indicator LED1 is electrically connected to the 5V voltage terminal of the voltage conversion circuit. Main control pins 13 and 14 are electrically connected to the first communication power supply circuit. Main control pins 4 and 12 are electrically connected to the output control circuit.

[0020] As a preferred embodiment, the main control module further includes a current detection circuit, which includes resistors R6 and R3 connected in series. The series node of resistors R6 and R3 is grounded, the non-series node of resistor R6 is electrically connected to the main control pin 16, and the non-series node of resistor R3 is electrically connected to the voltage conversion circuit.

[0021] As a preferred embodiment, the main control module further includes a voltage detection circuit, which includes resistors R7 and R8 connected in series. The series node of resistors R7 and R8 is electrically connected to the main control pin 16, the non-series node of resistor R8 is grounded, and the non-series node of resistor R7 is electrically connected to the voltage conversion circuit.

[0022] As a preferred embodiment, the first communication power supply circuit includes resistor R23, transistor Q2, transistor Q3, resistor R19, MOSFET Q4, resistor R218, chip BAV99, resistor R20, and resistor R21.

[0023] The emitter of transistor Q2 is electrically connected to the 8V voltage terminal of the voltage conversion circuit through resistor R23. The bases of transistors Q2 and Q3 are both electrically connected to the 5V voltage terminal of the voltage conversion circuit. The collectors of transistors Q2 and Q3 are electrically connected together to form the COMM1 terminal. The collector of transistor Q3 is grounded. The drain of MOSFET Q6 is electrically connected to the emitter of transistor Q3. The gate of MOSFET Q6 is electrically connected to the main control circuit. The gate of MOSFET Q6 is electrically connected to the source of MOSFET Q6 through resistor R18 and is grounded.

[0024] Pin 3 of chip BAV99 is electrically connected to the COMM1 terminal through resistor R19. Pin 1 of chip BAV99 is the GND1 terminal and grounded. Pin 2 of chip BAV99 is electrically connected to the 5V voltage terminal of the voltage conversion circuit. The main control circuit is electrically connected to pin 3 of chip BAV99 through resistor R20. The main control circuit is also grounded through resistor R21.

[0025] As a preferred embodiment, the output control circuit includes an optocoupler U2, resistors R9, R10, and R11, and a bidirectional thyristor Q1.

[0026] The positive terminal of the light emitter in optocoupler U2 is electrically connected to the 5V voltage terminal of the voltage conversion circuit. The negative terminal of the light emitter in optocoupler U2 is electrically connected to the main control circuit through resistor R9. One end of the light receiver in optocoupler U2 is electrically connected to the main electrode T2 of the bidirectional thyristor Q1 through resistor R10. The main electrode T2 of the bidirectional thyristor Q1 is electrically connected to the voltage conversion circuit. The main electrode T1 of the bidirectional thyristor Q1 is the N3 terminal. The control electrode G of the bidirectional thyristor Q1 is electrically connected to the other end of the light receiver in optocoupler U2. The two ends of resistor R11 are electrically connected to the main electrodes T2 and T1 of the bidirectional thyristor Q1, respectively.

[0027] As a preferred embodiment, the output control circuit further includes a diode D1, a resistor R34, and a resistor R33. The anode of the diode D1 is electrically connected to the main electrode T1 of the bidirectional thyristor Q1. The resistors R34 and R33 are connected in series. The series node of the resistors R34 and R33 is electrically connected to the main control circuit. The non-series node of the resistor R34 is electrically connected to the voltage conversion circuit. The non-series node of the resistor R33 is electrically connected to the cathode of the diode D1.

[0028] As a preferred embodiment, the function key circuit includes a key circuit and an indicator light circuit, and the processing circuit is electrically connected to the key circuit and the indicator light circuit respectively.

[0029] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it mainly improves the convenience of use by setting the main control circuit in the power supply device and setting the controller for button operation separately on the electric blanket body. In particular, by cooperating the first communication power supply circuit and the second communication circuit, the functions of providing power supply and transmitting and receiving signals can be integrated on the same wire. That is, only three plugs are needed at the interface connection, reducing the number of power cords, simplifying the overall circuit, and reducing circuit costs.

[0030] Secondly, by combining voltage detection circuits and current detection circuits, the safety and reliability of the product can be further improved.

[0031] Furthermore, the overall circuit structure is cleverly and reasonably designed, ensuring the stability and reliability of the product during use.

[0032] To more clearly illustrate the structural features and effects of the present invention, a detailed description is provided below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0033] Figure 1 This is a top view of a preferred embodiment of the present invention (mainly showing the electric blanket body and the power supply device not electrically connected).

[0034] Figure 2 This is a general control principle block diagram of a preferred embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the main control circuit of a preferred embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the first communication power supply circuit of a preferred embodiment of the present invention.

[0037] Figure 5 This is a schematic diagram of a voltage conversion circuit according to a preferred embodiment of the present invention (showing the current detection circuit and the voltage detection circuit).

[0038] Figure 6 This is a schematic diagram of the output control circuit of a preferred embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the signal processing circuit of a preferred embodiment of the present invention.

[0040] Figure 8 This is a schematic diagram of the function key circuit of a preferred embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of the second communication power supply circuit according to a preferred embodiment of the present invention.

[0042] Explanation of icon numbers:

[0043] 10. Electric blanket body 11. Controller

[0044] 111. Signal processing circuit 112. Function key circuit

[0045] 113. Second communication power supply circuit; 12. Second interface

[0046] 13. Heat load

[0047] 21. Power plug 22. Main control module

[0048] 221. Main control circuit; 222. Current detection circuit

[0049] 223. Voltage conversion circuit 224. Output control circuit

[0050] 225. First communication power supply circuit; 226. Voltage detection circuit

[0051] 23. First interface. Detailed Implementation

[0052] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0053] like Figures 1 to 9 As shown, a convenient electric blanket includes an electric blanket body 10 and a power supply device for power supply and control.

[0054] The power supply device includes a power plug 21 for electrical connection to AC mains power, a main control module 22 for voltage conversion and control, and a first interface 23 for electrical connection to the electric blanket body 10.

[0055] The main control module 22 includes a main control circuit 221, a current detection circuit 222, a voltage detection circuit 226, an output control circuit 224, a voltage conversion circuit 223 for converting AC mains power, and a first communication power supply circuit 225 for power supply and signal transmission / reception.

[0056] The main control circuit 221 is electrically connected to the output control circuit 224 and the first communication power supply circuit 225, respectively. In this embodiment, as shown... Figure 3 As shown, the main control circuit 221 includes a main control chip U3, an indicator LED1, and a resistor R12. The main control chip U3 has main control pins 1 to 20.

[0057] The main control pin 11 is electrically connected to the cathode of the indicator LED1 through resistor R12. The anode of the indicator LED1 is electrically connected to the 5V voltage terminal of the voltage conversion circuit 223. The main control pins 13 and 14 are electrically connected to the first communication power supply circuit 225. The main control pins 4 and 12 are electrically connected to the output control circuit 224.

[0058] like Figure 5 As shown, the current detection circuit 222 includes resistors R6 and R3 connected in series. The series node of resistors R6 and R3 is grounded, the non-series node of resistor R6 is electrically connected to the main control pin 16, and the non-series node of resistor R3 is electrically connected to the voltage conversion circuit 223.

[0059] like Figure 5 As shown, the voltage detection circuit 226 includes resistors R7 and R8 connected in series. The series node of resistors R7 and R8 is electrically connected to the main control pin 16, the non-series node of resistor R8 is grounded, and the non-series node of resistor R7 is electrically connected to the voltage conversion circuit 223.

[0060] like Figure 6 As shown, the output control circuit 224 has an N3 terminal. In this embodiment, the output control circuit 224 includes an optocoupler U2, resistors R9, R10, R11, and a bidirectional thyristor Q1.

[0061] The positive terminal of the light emitter in optocoupler U2 is electrically connected to the 5V voltage terminal of voltage conversion circuit 223. The negative terminal of the light emitter in optocoupler U2 is electrically connected to the main control circuit 221 through resistor R9. One end of the light receiver in optocoupler U2 is electrically connected to the main electrode T2 of bidirectional thyristor Q1 through resistor R10. The main electrode T2 of bidirectional thyristor Q1 is electrically connected to voltage conversion circuit 223. The main electrode T1 of bidirectional thyristor Q1 is the N3 terminal. The control electrode G of bidirectional thyristor Q1 is electrically connected to the other end of the light receiver in optocoupler U2. The two ends of resistor R11 are electrically connected to the main electrodes T2 and T1 of bidirectional thyristor Q1, respectively.

[0062] Preferably, the output control circuit 224 further includes a diode D1, a resistor R34, and a resistor R33. The anode of the diode D1 is electrically connected to the main electrode T1 of the bidirectional thyristor Q1. The resistors R34 and R33 are connected in series. The series node of the resistors R34 and R33 is electrically connected to the main control circuit 221. The non-series node of the resistor R34 is electrically connected to the voltage conversion circuit 223. The non-series node of the resistor R33 is electrically connected to the cathode of the diode D1.

[0063] The first communication power supply circuit 225 has a COMM1 terminal and a GND1 terminal. In this embodiment, as shown... Figure 4 As shown, the first communication power supply circuit 225 includes resistor R23, transistor Q2, transistor Q3, resistor R19, MOSFET Q4, resistor R218, chip BAV99, resistor R20, and resistor R21.

[0064] The emitter of transistor Q2 is electrically connected to the 8V voltage terminal of voltage conversion circuit 223 through resistor R23. The bases of transistors Q2 and Q3 are both electrically connected to the 5V voltage terminal of voltage conversion circuit 223. The collectors of transistor Q2 and the emitters of transistor Q3 are electrically connected together to form the COMM1 terminal. The collector of transistor Q3 is grounded. The drain of MOSFET Q6 is electrically connected to the emitter of transistor Q3. The gate of MOSFET Q6 is electrically connected to the main control circuit 221. The gate of MOSFET Q6 is electrically connected to the source of MOSFET Q6 through resistor R18 and is grounded.

[0065] Pin 3 of chip BAV99 is electrically connected to the COMM1 terminal through resistor R19. Pin 1 of chip BAV99 is the GND1 terminal and grounded. Pin 2 of chip BAV99 is electrically connected to the 5V voltage terminal of voltage conversion circuit 223. The main control circuit 221 is electrically connected to pin 3 of chip BAV99 through resistor R20. The main control circuit 221 is also grounded through resistor R21.

[0066] The first interface 23 has a first conductive terminal to a third conductive terminal, the third conductive terminal being electrically connected to the N3 terminal, the first conductive terminal being electrically connected to the COMM1 terminal, and the second conductive terminal being electrically connected to the GND1 terminal.

[0067] The outer side of the electric blanket body 10 is provided with a controller 11 and a second interface 12 that can be plugged into the first interface 23. Preferably, the controller 11...

[0068] The controller 11 is equipped with a signal processing circuit 111, a function key circuit 112, and a second communication power supply circuit 113 for separating the power and signal provided by the main control terminal.

[0069] The signal processing circuit 111 is electrically connected to the function key circuit 112 and the second communication power supply circuit 113, respectively. In this embodiment, as shown... Figure 7 As shown, the signal processing circuit 111 includes a processing chip U4, which has processing pins 1 to 16.

[0070] Processing pins 3 and 4 are electrically connected to the second communication power supply circuit 113, and processing pins 1, 2, 6, 14, 15, and 16 are all electrically connected to the function key circuit 112. Preferably, as follows... Figure 8As shown, the function key circuit 112 includes a key circuit and an indicator light circuit, and the processing circuit is electrically connected to the key circuit and the indicator light circuit respectively. The key circuit includes a key SW1, and the indicator light circuit includes five sub-indicator light circuits. Each sub-indicator light circuit includes a resistor connected in series and an LED DSX (X is any one from 1 to 5). In this embodiment, the five sub-indicator light circuits are defined as the first sub-indicator light circuit to the fifth sub-indicator light circuit. The first sub-indicator light circuit includes a resistor R27 and an LED DS1, the second sub-indicator light circuit includes a resistor R28 and an LED DS2, and so on, with the fifth sub-indicator light circuit including a resistor R31 and an LED DS5.

[0071] The second communication power supply circuit 113 has a COMM2 terminal and a GND2 terminal. Both the second communication power supply circuit 113 and the first communication power supply circuit 225 combine signal multiplexing and carrier transmission. In this embodiment, as shown... Figure 9 As shown, the second communication power supply circuit 113 includes a resistor R22, a chip BAV99, a polarized capacitor C7, a resistor R23, a resistor R24, a MOSFET Q6, and a resistor R25.

[0072] Pin 3 of chip BAV99 is the COMM2 terminal, pin 1 of chip BAV99 is the GND2 terminal and grounded, pin 2 of chip BAV99 outputs +4.4V voltage, the positive terminal of polarized capacitor C7 is electrically connected to pin 2 of chip BAV99, the negative terminal of polarized capacitor C7 is grounded, and resistor R22 is connected in parallel to the positive and negative terminals of polarized capacitor C7.

[0073] The drain of MOSFET Q6 is electrically connected to pin 3 of chip BAV99. Signal processing circuit 111 is electrically connected to the drain of MOSFET Q6 through resistor R23. Signal processing circuit 111 is also grounded through resistor R24. The source of MOSFET Q6 is grounded. The gate of MOSFET Q6 is electrically connected to signal processing circuit 111. The gate of MOSFET Q6 is also grounded through resistor R25.

[0074] The second interface 12 has a sixth to a fifth conductive terminal. The fourth conductive terminal is electrically connected to the COMM2 terminal, and the fifth conductive terminal is electrically connected to the GND2 terminal. A heating load 13 is provided inside the electric blanket body 10. One end of the heating load 13 is electrically connected to the sixth conductive terminal, and the other end of the heating load 13 is electrically connected to the fifth conductive terminal. In this embodiment, the heating load 13 includes a first heating wire, a diode D3, and a second heating wire. One end of the first heating wire is electrically connected to the sixth conductive terminal, and the other end of the first heating wire is electrically connected to the anode of the diode D3. The cathode of the diode D3 is electrically connected to one end of the second heating wire, and the other end of the second heating wire is electrically connected to the fifth conductive terminal.

[0075] The first interface 23 is connected to the second interface 12, the third conductive terminal is electrically connected to the sixth conductive terminal, the first conductive terminal is electrically connected to the fourth conductive terminal, and the second conductive terminal is electrically connected to the fifth conductive terminal.

[0076] The key design feature of this invention is that it mainly sets the main control circuit on the power supply device and sets the controller for button operation separately on the electric blanket body, which brings convenience to use. In particular, through the cooperation of the first communication power supply circuit and the second communication circuit, the functions of providing power supply and transmitting and receiving signals can be integrated on the same power cord. That is, only three plugs are needed at the interface connection, reducing the number of power cords, simplifying the overall circuit, and reducing circuit costs.

[0077] Secondly, by combining voltage detection circuits and current detection circuits, the safety and reliability of the product can be further improved.

[0078] Furthermore, the overall circuit structure is cleverly and reasonably designed, ensuring the stability and reliability of the product during use.

[0079] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A convenient electric blanket, characterized in that: It includes the electric blanket body and a power supply device for power supply and control; The power supply device includes a power plug for electrical connection to AC mains power, a main control module for voltage conversion and control, and a first interface for electrical connection to the electric blanket body. The main control module includes a main control circuit, an output control circuit, a voltage conversion circuit for converting AC mains power, and a first communication power supply circuit for power supply and signal transmission / reception. The main control circuit is electrically connected to the output control circuit and the first communication power supply circuit, respectively. The output control circuit has an N3 terminal. The output control circuit includes an optocoupler U2, resistors R9, R10, R11, a bidirectional thyristor Q1, a diode D1, resistors R34 and R33; The positive terminal of the light emitter in optocoupler U2 is electrically connected to the 5V voltage terminal of the voltage conversion circuit. The negative terminal of the light emitter in optocoupler U2 is electrically connected to the main control circuit through resistor R9. One end of the light receiver in optocoupler U2 is electrically connected to the main electrode T2 of the bidirectional thyristor Q1 through resistor R10. The main electrode T2 of the bidirectional thyristor Q1 is electrically connected to the voltage conversion circuit. The main electrode T1 of the bidirectional thyristor Q1 is the N3 terminal. The control electrode G of the bidirectional thyristor Q1 is electrically connected to the other end of the light receiver in optocoupler U2. The two ends of resistor R11 are electrically connected to the main electrodes T2 and T1 of the bidirectional thyristor Q1, respectively. The anode of diode D1 is electrically connected to the main electrode T1 of bidirectional thyristor Q1. Resistors R34 and R33 are connected in series. The series node of resistors R34 and R33 is electrically connected to the main control circuit. The non-series node of resistor R34 is electrically connected to the voltage conversion circuit. The non-series node of resistor R33 is electrically connected to the cathode of diode D1. The first communication power supply circuit has a COMM1 terminal and a GND1 terminal. The first interface has a first conductive terminal to a third conductive terminal. The third conductive terminal is electrically connected to the N3 terminal. The first conductive terminal is electrically connected to the COMM1 terminal. The second conductive terminal is electrically connected to the GND1 terminal. The first communication power supply circuit includes resistor R23, transistor Q2, transistor Q3, resistor R19, MOSFET Q4, resistor R218, chip BAV99, resistor R20, and resistor R21. The emitter of transistor Q2 is electrically connected to the 8V voltage terminal of the voltage conversion circuit through resistor R23. The bases of transistors Q2 and Q3 are both electrically connected to the 5V voltage terminal of the voltage conversion circuit. The collectors of transistors Q2 and Q3 are electrically connected together to form the COMM1 terminal. The collector of transistor Q3 is grounded. The drain of MOSFET Q6 is electrically connected to the emitter of transistor Q3. The gate of MOSFET Q6 is electrically connected to the main control circuit. The gate of MOSFET Q6 is electrically connected to the source of MOSFET Q6 through resistor R18 and is grounded. Pin 3 of chip BAV99 is electrically connected to the COMM1 terminal through resistor R19. Pin 1 of chip BAV99 is the GND1 terminal and grounded. Pin 2 of chip BAV99 is electrically connected to the 5V voltage terminal of the voltage conversion circuit. The main control circuit is electrically connected to pin 3 of chip BAV99 through resistor R20. The main control circuit is also grounded through resistor R21. The outer side of the electric blanket body is provided with a controller and a second interface that can be plugged into the first interface. The controller is provided with a signal processing circuit, a function button circuit, and a second communication power supply circuit for separating the power and signal provided by the main control terminal. The signal processing circuit is electrically connected to the function button circuit and the second communication power supply circuit respectively. The second communication power supply circuit has a COMM2 terminal and a GND2 terminal. The second communication power supply circuit includes resistor R22, chip BAV99, polarized capacitor C7, resistor R23, resistor R24, MOSFET Q6, and resistor R25. Pin 3 of chip BAV99 is the COMM2 terminal, pin 1 of chip BAV99 is the GND2 terminal and grounded, pin 2 of chip BAV99 outputs +4.4V voltage, the positive terminal of polarized capacitor C7 is electrically connected to pin 2 of chip BAV99, the negative terminal of polarized capacitor C7 is grounded, and resistor R22 is connected in parallel to the positive and negative terminals of polarized capacitor C7. The drain of MOSFET Q6 is electrically connected to pin 3 of chip BAV99. The signal processing circuit is electrically connected to the drain of MOSFET Q6 through resistor R23. The signal processing circuit is also grounded through resistor R24. The source of MOSFET Q6 is grounded. The gate of MOSFET Q6 is electrically connected to the signal processing circuit. The gate of MOSFET Q6 is also grounded through resistor R25. The second interface has a fourth to a sixth conductive terminal, the fourth conductive terminal being electrically connected to the COMM2 terminal, and the fifth conductive terminal being electrically connected to the GND2 terminal; the electric blanket body is provided with a heating load, one end of the heating load being electrically connected to the sixth conductive terminal, and the other end of the heating load being electrically connected to the fifth conductive terminal; The first interface and the second interface are connected, the third conductive terminal is electrically connected to the sixth conductive terminal, the first conductive terminal is electrically connected to the fourth conductive terminal, and the second conductive terminal is electrically connected to the fifth conductive terminal.

2. The convenient electric blanket according to claim 1, characterized in that: The signal processing circuit includes a processing chip U4, which has processing pins 1 to 16. Processing pin 3 and processing pin 4 are electrically connected to the second communication power supply circuit, and processing pin 1, processing pin 2, processing pin 6, processing pin 14, processing pin 15 and processing pin 16 are all electrically connected to the function key circuit.

3. The convenient electric blanket according to claim 1, characterized in that: The main control circuit includes a main control chip U3, an indicator LED1 and a resistor R12. The main control chip U3 has main control pins 1 to 20. Main control pin 11 is electrically connected to the cathode of indicator LED1 through resistor R12. The anode of indicator LED1 is electrically connected to the 5V voltage terminal of the voltage conversion circuit. Main control pins 13 and 14 are electrically connected to the first communication power supply circuit. Main control pins 4 and 12 are electrically connected to the output control circuit.

4. The convenient electric blanket according to claim 3, characterized in that: The main control module also includes a current detection circuit, which includes resistors R6 and R3 connected in series. The series node of resistors R6 and R3 is grounded, the non-series node of resistor R6 is electrically connected to the main control pin 16, and the non-series node of resistor R3 is electrically connected to the voltage conversion circuit.

5. The convenient electric blanket according to claim 3, characterized in that: The main control module also includes a voltage detection circuit, which includes resistors R7 and R8 connected in series. The series node of resistors R7 and R8 is electrically connected to the main control pin 16, the non-series node of resistor R8 is grounded, and the non-series node of resistor R7 is electrically connected to the voltage conversion circuit.

6. The convenient electric blanket according to claim 1, characterized in that: The function key circuit includes a key circuit and an indicator light circuit, and the processing circuit is electrically connected to the key circuit and the indicator light circuit respectively.

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