Control circuit of multifunctional electric sofa

Abstract

The utility model discloses a control circuit of a multifunctional electric sofa. The control circuit comprises a direct-current power supply, a DC-DC conversion circuit, an LDO (Low Dropout Regulator) circuit, an MCU (Microprogrammed Control Unit), a sofa extension or contraction control circuit, a headrest extension or contraction control circuit, a ventilation control circuit, an air bag control circuit, a vibration massage circuit, an LED (Light Emitting Diode) lamp control circuit, a Bluetooth sound power supply circuit and a heating pad control circuit, the direct-current power supply supplies power to each functional circuit module; the direct-current power supply is also electrically connected with the DC-DC conversion circuit and outputs first direct current to supply power to the USB socket; the direct-current power supply is further electrically connected with the LDO chip circuit, the direct-current power supply is converted into second direct current through the LDO chip circuit, and the second direct current supplies power to the MCU. According to the utility model, all functional circuit modules can be controlled in a centralized manner, and the integration degree is high; each functional module is powered by a direct-current power supply with the same voltage, so that the control circuit is simplified, the stability of the control circuit is improved, and each functional circuit module can meet each requirement of a user.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric sofa technical field, especially a control circuit of multifunctional electric sofa. BACKGROUND

[0002] Sofa chair usually includes sofa support frame and chair seat, chair back and foot pedal and other components installed on the sofa support frame, in the prior art, the structure of sofa chair support is usually single, the position is fixed, it is difficult to deform use according to the use demand of user, lead to certain limitation when using, bring inconvenience for people's use.

[0003] With the progress of technology, people gradually increase the sofa electric stretching or contraction, massage and other functions on the sofa, but the current sofa control circuit often still has the following technical problems: (1) sofa electric stretching or contraction is often controlled by separate control circuit and switch button, usually not integrated with the control circuit of massage and other functions, the degree of integration is not high enough; (2) the power supply voltage used by sofa electric stretching or contraction, massage and other function modules is often not unified, the sofa control circuit needs to convert and output different voltages to supply power to sofa electric stretching or contraction, massage and other function modules, which improves the complexity of the sofa control circuit and makes the stability of the sofa control circuit not high enough; (3) the function of control circuit is not rich enough, cannot support sofa stretching or contraction function, headrest stretching or contraction function, ventilation function, air bag massage function, vibration massage function, LED lamp atmosphere function, Bluetooth sound function, heating pad function and USB socket function at the same time, it is difficult to meet the various needs of users. CONTENT OF UTILITY MODEL

[0004] The utility model solves the technical problem in the prior art, provides a control circuit of multifunctional electric sofa, the various function modules of the control circuit can be controlled centrally, the degree of integration is high;The control circuit uses the same voltage DC power supply to supply power to the first motor, the second motor, the ventilation fan, the massage air bag, the vibrator, the LED lamp, the Bluetooth sound and the heating pad, which simplifies the control circuit and improves the stability of the control circuit;The control circuit simultaneously supports sofa stretching or contraction function, headrest stretching or contraction function, ventilation function, air bag massage function, vibration massage function, LED lamp atmosphere function, Bluetooth sound function, heating pad function and USB socket function, which can meet the various needs of users.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a control circuit for a multifunctional electric sofa, including a DC power supply, a DC-DC conversion circuit, an LDO circuit, an MCU, a sofa extension or retraction control circuit, a headrest extension or retraction control circuit, a ventilation control circuit, an airbag control circuit, a vibration massage circuit, an LED light control circuit, a Bluetooth speaker power supply circuit, and a heating pad control circuit; the DC power supply provides power to the sofa extension or retraction control circuit, the headrest extension or retraction control circuit, the ventilation control circuit, the airbag control circuit, the vibration massage circuit, the LED light control circuit, the Bluetooth speaker power supply circuit, and the heating pad control circuit; the DC power supply is also electrically connected to the DC-DC conversion circuit, and the DC power supply... A first DC power supply is output through a DC-DC conversion circuit, and the first DC power supply is connected to a USB socket; the DC power supply is also electrically connected to an LDO chip circuit, and the DC power supply is converted into a second DC power supply through the LDO chip circuit, which supplies power to the MCU; the MCU is electrically connected to the sofa extension or retraction control circuit, the headrest extension or retraction control circuit, the ventilation control circuit, the airbag control circuit, the vibration massage circuit, the LED light control circuit, the Bluetooth speaker power supply circuit, and the heating pad control circuit, and controls the operation of the sofa extension or retraction control circuit, the headrest extension or retraction control circuit, the ventilation control circuit, the airbag control circuit, the vibration massage circuit, the LED light control circuit, the Bluetooth speaker power supply circuit, and the heating pad control circuit.

[0006] Preferably, the voltage of the DC power supply is 12V, and the DC-DC conversion circuit includes a CX8802 step-down chip. The DC-DC conversion circuit converts the 12V DC power supply into a first DC power of 5V and supplies it to the USB socket; the voltage of the second DC power is 5V.

[0007] Preferably, the MCU is electrically connected to a key signal input circuit, which has multiple keys for inputting control commands to the MCU.

[0008] Preferably, the MCU is electrically connected to a wireless signal receiving circuit, which includes a SYN590 RF receiver chip and an antenna.

[0009] Preferably, the control circuit further includes a voice input module, which is powered by a first DC power output from a DC-DC converter circuit, or plugged into a USB socket and powered by the USB socket; the voice input module is wirelessly connected to a wireless signal receiving circuit.

[0010] Preferably, the control circuit further includes a Darlington driver chip, which is connected between the MCU and the sofa extension or retraction control circuit, the Bluetooth speaker power supply circuit, and the headrest extension or retraction control circuit. The sofa extension or retraction control circuit is electrically connected to a first motor and includes a first relay and a second relay. The control signal output by the MCU to the sofa extension or retraction control circuit is amplified by the Darlington driver chip and controls the first and second relays to operate, which in turn control the motor to extend or retract the sofa. The Bluetooth speaker power supply circuit is connected to a Bluetooth speaker and includes a third relay. The control signal output by the MCU to the Bluetooth speaker power supply circuit is amplified by the Darlington driver chip and controls the third relay to operate, which in turn controls the Bluetooth speaker. The headrest extension or retraction control circuit is electrically connected to a second motor and includes a fourth relay and a fifth relay. The control signal output by the MCU to the headrest extension or retraction control circuit is amplified by the Darlington driver chip and controls the fourth and fifth relays to operate, which in turn control the second motor to extend or retract the headrest.

[0011] Preferably, the control circuit further includes a first current sensing amplifier and a second current sensing amplifier. The current signals of the first and second relays of the sofa extension or retraction control circuit are sensed and amplified by the first current sensing amplifier and then fed back to the MCU in real time. The current signals of the fourth and fifth relays of the headrest extension or retraction control circuit are sensed and amplified by the second current sensing amplifier and then fed back to the MCU in real time.

[0012] Preferably, the airbag control circuit includes a forward / reverse chip and a massage airbag. The control signal output by the MCU to the airbag control circuit is passed through the forward / reverse chip to control the massage airbag to inhale or deflate.

[0013] Preferably, the ventilation control circuit includes a first transistor, a first MOSFET, and a fan. The control signal output by the MCU to the ventilation control circuit passes through the first transistor and the first MOSFET to control the fan. The vibration massage circuit includes a second transistor, a second MOSFET, and a vibration massager. The control signal output by the MCU to the vibration massage circuit passes through the second transistor and the second MOSFET to control the vibration massager. The heating pad control circuit includes a third transistor, a third MOSFET, and a heating pad. The control signal output by the MCU to the heating pad control circuit passes through the third transistor and the third MOSFET to control the heating pad.

[0014] Preferably, the LED light control circuit includes an LED strip control circuit and an LED lamp holder control circuit; the LED strip control circuit includes a fourth transistor, a fourth MOSFET, and an LED strip, and the control signal output by the MCU to the LED strip control circuit controls the LED strip to work after passing through the fourth transistor and the fourth MOSFET; the LED lamp holder control circuit includes a fifth transistor, a fifth MOSFET, and an LED lamp holder, and the control signal output by the MCU to the LED lamp holder control circuit controls the LED lamp holder to work after passing through the fifth transistor and the fifth MOSFET.

[0015] The beneficial effects of this utility model are: (1) Since the MCU is electrically connected to the headrest extension or retraction control circuit, ventilation control circuit, airbag control circuit, vibration massage circuit, LED light control circuit, Bluetooth speaker power supply circuit and heating pad control circuit respectively, and controls the headrest extension or retraction control circuit, ventilation control circuit, airbag control circuit, vibration massage circuit, LED light control circuit, Bluetooth speaker power supply circuit and heating pad control circuit to work, this utility model can realize that all functional modules of the sofa are centrally controlled by the MCU, and the degree of integration is high; (2) The DC power supply of this utility model supplies power to the headrest extension or retraction control circuit, ventilation control circuit, airbag control circuit, vibration massage circuit, LED light control circuit, Bluetooth speaker power supply circuit and heating pad control circuit respectively, this utility model can use the same voltage DC power supply to supply the first circuit. The power supply for the machine, the second motor, the ventilation fan, the massage airbag, the vibrator, the LED light, the Bluetooth speaker and the heating pad is simplified, and the stability of the control circuit is improved; (3) Since the DC power supply is also connected to the DC-DC conversion circuit, the DC power supply outputs the first DC power through the DC-DC conversion circuit. The first DC power is connected to the USB socket. Therefore, the present invention has the function of charging mobile phones with the USB socket; Since the DC power supply is also connected to the LDO chip circuit, the DC power supply is converted into the second DC power through the LDO chip circuit, which can ensure stable power supply to the MCU; (4) The present invention simultaneously supports the functions of sofa extension or retraction, headrest extension or retraction, ventilation, airbag massage, vibration massage, LED light atmosphere, Bluetooth speaker, heating pad and USB socket, which can meet the various needs of users. Attached Figure Description

[0016] Figure 1 This is a block diagram of the circuit architecture of this utility model.

[0017] Figure 2 This is a circuit diagram of the DC power supply, DC-DC conversion circuit, LDO circuit, MCU, ventilation control circuit, and key signal input circuit of this utility model.

[0018] Figure 3 The circuit diagrams are for the sofa extension or retraction control circuit, Bluetooth speaker power supply circuit, airbag control circuit, first current sensing amplifier, vibration massage circuit, LED light strip control circuit, LED lamp cup control circuit, and wireless signal receiving circuit of this utility model.

[0019] Figure 4 The circuit diagram shows the headrest extension or retraction control circuit, the second current sensing amplifier, the heating pad control circuit, and the Darlington driver chip of this utility model. Detailed Implementation

[0020] The structural and working principles of this utility model will be further described in detail below with reference to the accompanying drawings.

[0021] like Figures 1-4As shown, this utility model is a control circuit for a multifunctional electric sofa, including a DC power supply 1, a DC-DC converter circuit 2, an LDO circuit 3, an MCU 4, a sofa extension or retraction control circuit 5, a headrest extension or retraction control circuit 22, a ventilation control circuit 6, an airbag control circuit 7, a vibration massage circuit 8, an LED light control circuit, a Bluetooth speaker power supply circuit 9, and a heating pad control circuit 23; the DC power supply 1 supplies power to the sofa extension or retraction control circuit 5, the headrest extension or retraction control circuit 22, the ventilation control circuit 6, the airbag control circuit 7, the vibration massage circuit 8, the LED light control circuit, the Bluetooth speaker power supply circuit 9, and the heating pad control circuit 23 respectively; the DC power supply 1 is also electrically connected to the DC-DC converter circuit 2, and the DC power supply 1 transmits .... The switching circuit 2 outputs a first DC power supply, which is connected to a USB socket 10. The DC power supply 1 is also electrically connected to an LDO chip circuit 3. The DC power supply 1 is converted into a second DC power supply through the LDO chip circuit 3, which supplies power to the MCU 4. The MCU 4 is electrically connected to the sofa extension or retraction control circuit 5, the headrest extension or retraction control circuit 22, the ventilation control circuit 6, the airbag control circuit 7, the vibration massage circuit 8, the LED light control circuit, the Bluetooth speaker power supply circuit 9, and the heating pad control circuit 23, and controls the operation of the sofa extension or retraction control circuit 5, the headrest extension or retraction control circuit 22, the ventilation control circuit 6, the airbag control circuit 7, the vibration massage circuit 8, the LED light control circuit, the Bluetooth speaker power supply circuit 9, and the heating pad control circuit 23. This invention enables centralized control of all functional modules of the sofa by an MCU, achieving a high degree of integration. It utilizes a single DC power supply to power the first motor, second motor, ventilation fan, massage airbags, vibrator, LED lights, Bluetooth speaker, and heating pad, simplifying the control circuit and improving its stability. Furthermore, because the DC power supply is also connected to a DC-DC converter circuit, it outputs a first DC current connected to a USB socket, thus providing a USB charging function for mobile phones. Additionally, the DC power supply is connected to an LDO chip circuit, converting the DC current into a second DC current, ensuring stable power supply to the MCU. This invention simultaneously supports sofa extension / retraction, headrest extension / retraction, ventilation, airbag massage, vibration massage, LED ambient lighting, Bluetooth speaker, heating pad, and USB socket functions, meeting various user needs.

[0022] like Figure 1 and Figure 2As shown, the MCU chip model is FT62F288E-LRB, the DC power supply voltage is 12V, the DC power supply 1 voltage is 12V, the DC-DC conversion circuit 2 includes a CX8802 step-down chip, the DC-DC conversion circuit 2 converts the 12V DC power supply into a first DC power of 5V and supplies it to the USB socket 10; the second DC power is 5V and is connected to the MCU pin VDD.

[0023] like Figure 1 and Figure 2 As shown, the MCU is electrically connected to a button signal input circuit. The button signal input circuit 11 is equipped with multiple buttons for inputting control commands to the MCU. The buttons include buttons S1, S2, S3, S4, S5, S6, S7, S8, and S9.

[0024] like Figure 1 and Figure 3 As shown, the MCU is electrically connected to a wireless signal receiving circuit 24, which includes a SYN590 RF receiver chip U9 and an antenna ANT connected to the SYN590 RF receiver chip U9.

[0025] In a preferred embodiment of this invention, the control circuit further includes a voice input module 12. The voice input module 12 is powered by a first DC power output from the DC-DC converter circuit 2, or it is plugged into a USB socket 10 and powered by the USB socket 10. The voice input module is wirelessly connected to the wireless signal receiving circuit 24. Through the voice input module 12, voice can be used to control the sofa's extension or retraction, the headrest's extension or retraction, massage, ventilation, airbag opening and closing, and heating functions. Voice can also be used to control the voice module 12 to perform functions such as telling stories to the user and playing e-books.

[0026] like Figures 1-4As shown, the control circuit also includes a Darlington driver chip U6, model ULN2002D. The Darlington driver chip U6 is connected between the MCU and the sofa extension / retraction control circuit 5, the Bluetooth speaker power supply circuit 9, and the headrest extension / retraction control circuit 22. The sofa extension / retraction control circuit 5 is electrically connected to a first motor 13. The sofa extension / retraction control circuit 5 has a first relay REY1 and a second relay REY2. The control signal output by the MCU to the sofa extension / retraction control circuit is amplified by the Darlington driver chip U6, controlling the first relay REY1 and the second relay REY2 to operate. The first relay REY1 and the second relay REY2 then control the first motor 13 to operate, thereby controlling the extension or retraction of the sofa. The sofa extension or retraction refers to the extension or retraction of the seat and footrest. The Bluetooth speaker power supply circuit 9 is connected to the Bluetooth speaker 14. The Bluetooth speaker power supply circuit 9 is equipped with a third relay REY3. The control signal output by the MCU to the Bluetooth speaker power supply circuit 9 is amplified by the Darlington driver chip U6 and controls the third relay REY3 to work. The third relay REY3 then controls the Bluetooth speaker 14 to work. The headrest extension or retraction control circuit 22 is electrically connected to the second motor 25. The headrest extension or retraction control circuit 22 is equipped with a fourth relay REY4 and a fifth relay REY5. The control signal output by the MCU to the headrest extension or retraction control circuit 22 is amplified by the Darlington driver chip U6 and controls the fourth relay REY4 and the fifth relay REY5 to work. The fourth relay REY4 and the fifth relay REY5 then control the second motor 25 to work, thereby controlling the extension or retraction of the headrest. The control circuit also includes a first current sensing amplifier U7 and a second current sensing amplifier U8. The current signals from the first relay REY1 and the second relay REY2 of the sofa extension or retraction control circuit are sensed and amplified by the first current sensing amplifier U7 and then fed back to the MCU in real time. The current signals from the fourth relay REY4 and the fifth relay REY5 of the headrest extension or retraction control circuit 22 are sensed and amplified by the second current sensing amplifier U8 and then fed back to the MCU in real time. This allows the MCU to sense the extension or retraction position of the first motor 13 and the second motor 25 in real time. Both the first current sensing amplifier U7 and the second current sensing amplifier U8 use TP181A2 chips. The first motor 13 and the second motor 25 have built-in Hall effect sensors, which can precisely control the extension or retraction position of the sofa and the headrest. They can also memorize the extension or retraction position of the sofa and headrest, and enable one-button operation to extend to the maximum or retract to the original position (one-button reset).

[0027] like Figure 2 and Figure 3As shown, the airbag control circuit 7 includes a forward / reverse chip U5 and a massage airbag 16. The control signal output by the MCU to the airbag control circuit is controlled by the forward / reverse chip U5 to control the massage airbag 16 to inhale or deflate.

[0028] like Figures 2-4 As shown, the ventilation control circuit 6 includes a first transistor Q1, a first MOSFET Q4, and a fan 15. The control signal output by the MCU to the ventilation control circuit passes through the first transistor Q1 and the first MOSFET Q4 to control the fan 15. The vibration massage circuit 8 includes a second transistor Q6, a second MOSFET Q3, and a vibration massager 17. The control signal output by the MCU to the vibration massage circuit 8 passes through the second transistor Q6 and the second MOSFET Q3 to control the vibration massager 17. The heating pad control circuit 23 includes a third transistor Q10, a third MOSFET Q11, and a heating pad 26. The control signal output by the MCU to the heating pad control circuit 23 passes through the third transistor Q10 and the third MOSFET Q11 to control the heating pad 26.

[0029] like Figure 2 and Figure 3 As shown, the LED light control circuit includes an LED strip control circuit 18 and an LED lamp holder control circuit 19. The LED strip control circuit 18 includes a fourth transistor Q7, a fourth MOSFET Q9, and an LED strip 20. The control signal output by the MCU to the LED strip control circuit passes through the fourth transistor Q7 and the fourth MOSFET Q9 to control the LED strip 20 to work. The LED strip 20 can emit white light and seven-color light. The LED lamp holder control circuit includes a fifth transistor Q2, a fifth MOSFET Q8, and an LED lamp holder 21. The control signal output by the MCU to the LED lamp holder control circuit passes through the fifth transistor Q2 and the fifth MOSFET Q8 to control the LED lamp holder 21 to work. The LED lamp holder 21 can emit white light and seven-color light and can be used as an ashtray.

[0030] The above description is merely a preferred embodiment of this utility model. Any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical solution of this utility model shall fall within the scope of the technical solution of this utility model.

Claims

1. A control circuit for a multi-functional electric sofa, characterized by: The control circuit further comprises a voice input module, the voice input module is powered by the first direct current output by the DC-DC conversion circuit, or is plugged into the USB socket and is powered by the USB socket; the voice input module is wirelessly connected with the wireless signal receiving circuit.

2. The control circuit of the multi-functional electric sofa according to claim 1, wherein: The voltage of the direct current power supply is 12V, the DC-DC conversion circuit comprises a CX8802 voltage reduction chip, the DC-DC conversion circuit converts the 12V direct current power supply into 5V first direct current and supplies the USB socket; the voltage of the second direct current is 5V.

3. The control circuit of the multi-functional electric sofa according to claim 1, wherein: The MCU is electrically connected with a key signal input circuit, the key signal input circuit is provided with a plurality of keys for inputting control commands to the MCU.

4. The control circuit of the multi-functional electric sofa according to claim 1, wherein: The MCU is electrically connected with a wireless signal receiving circuit, the wireless signal receiving circuit comprises a SYN590 radio frequency receiving chip, and the SYN590 radio frequency receiving chip is connected with an antenna.

5. The control circuit of the multi-functional electric sofa according to claim 4, wherein: The control circuit further comprises a voice input module, the voice input module is powered by the first direct current output by the DC-DC conversion circuit, or is plugged into the USB socket and is powered by the USB socket; the voice input module is wirelessly connected with the wireless signal receiving circuit.

6. The control circuit of the multi-functional electric sofa according to claim 1, wherein: The control circuit further comprises a Darlington drive chip connected between the MCU and the sofa stretching or retracting control circuit, the Bluetooth sound supply circuit and the headrest stretching or retracting control circuit; the sofa stretching or retracting control circuit is electrically connected with a first motor, and is provided with a first relay and a second relay; the control signal output by the MCU to the sofa stretching or retracting control circuit is amplified by the Darlington drive chip, and then controls the first relay and the second relay to work, and then controls the motor to work through the first relay and the second relay, so as to control the sofa to stretch or retract; the Bluetooth sound supply circuit is connected with a Bluetooth sound, and is provided with a third relay; the control signal output by the MCU to the Bluetooth sound supply circuit is amplified by the Darlington drive chip, and then controls the third relay to work, and then controls the Bluetooth sound to work through the third relay; the headrest stretching or retracting control circuit is electrically connected with a second motor, and is provided with a fourth relay and a fifth relay; the control signal output by the MCU to the headrest stretching or retracting control circuit is amplified by the Darlington drive chip, and then controls the fourth relay and the fifth relay to work, and then controls the second motor to work through the fourth relay and the fifth relay, so as to control the headrest to stretch or retract.

7. The control circuit of the multi-functional electric sofa according to claim 1, wherein: The control circuit further comprises a first current sensing amplifier and a second current sensing amplifier; the current signals of the first relay and the second relay of the sofa stretching or retracting control circuit are sensed and amplified by the first current sensing amplifier, and then fed back to the MCU in real time; the current signals of the fourth relay and the fifth relay of the headrest stretching or retracting control circuit are sensed and amplified by the second current sensing amplifier, and then fed back to the MCU in real time.

8. The control circuit of the multi-functional electric sofa according to claim 1, wherein: The air bag control circuit comprises a positive and negative conversion chip and a massage air bag; the control signal output by the MCU to the air bag control circuit is converted by the positive and negative conversion chip, and then controls the massage air bag to inhale or exhale.

9. The control circuit of the multi-functional electric sofa according to claim 1, wherein: The ventilation control circuit comprises a first triode, a first MOS tube and a fan; the control signal output by the MCU to the ventilation control circuit is converted by the first triode and the first MOS tube, and then controls the fan to work; the vibration massage circuit comprises a second triode, a second MOS tube and a vibration massager; the control signal output by the MCU to the vibration massage circuit is converted by the second triode and the second MOS tube, and then controls the vibration massager to work; the heating pad control circuit comprises a third triode, a third MOS tube and a heating pad; the control signal output by the MCU to the heating pad control circuit is converted by the third triode and the third MOS tube, and then controls the heating pad to work.

10. The control circuit of the multi-functional electric sofa according to claim 1, wherein: The LED lamp control circuit comprises an LED lamp strip control circuit and an LED lamp cup control circuit; the LED lamp strip control circuit comprises a fourth triode, a fourth MOS tube and an LED lamp strip; the control signal output by the MCU to the LED lamp strip control circuit passes through the fourth triode and the fourth MOS tube, and then controls the operation of the LED lamp strip; the LED lamp cup control circuit comprises a fifth triode, a fifth MOS tube and an LED lamp cup; the control signal output by the MCU to the LED lamp cup control circuit passes through the fifth triode and the fifth MOS tube, and then controls the operation of the LED lamp cup.

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