Cigarette lighter control circuit

Abstract

The utility model discloses a cigarette lighter control circuit, which belongs to the technical field of cigarette lighters, and is provided with a control unit, an interface unit, a heating unit, a switch unit and an indication unit, the interface unit is connected with a voltage input end, and the control unit receives a trigger signal of the switch unit to control the indication unit to start and the heating unit to work. The interface unit is used as an access mode of a voltage input end, a power supply can be quickly provided, the switch unit and the indication unit are matched for use, the working condition of the cigarette lighter can be visually known, the number of parts is smaller, the size is smaller, the convenience of the product is improved, a built-in battery is not needed in the cigarette lighter, and the cost is reduced. And the system can be matched with a smart phone, a notebook computer or a power bank, so that the cost is saved, and the user experience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lighters, and particularly relates to a lighter control circuit. Background Art

[0002] A lighter can charge its built-in lithium battery through an external power supply. Its commonly used USB charging interface can be directly inserted into the USB female socket of a computer to charge it, or inserted into an AC power supply with a USB female socket to charge it. Usually, it takes 2 - 3 hours to fully charge. After being fully charged, the lighter can be used to light a cigarette, and it takes 4 - 5 seconds to light a cigarette once. However, the lighter lights a cigarette by heating a heating wire, so there is no open flame, and it is not afraid of wind or cold weather. Currently, most lighters use a USB interface for charging, the designed circuit is relatively complex, and there is also a lack of an on / off indication for the lighter, resulting in a low user experience. Summary of the Utility Model

[0003] In view of the above problems, the utility model provides a lighter control circuit, which can achieve a small size and convenient operation, can be used in conjunction with multiple terminals and quickly complete lighting a cigarette, and also improves the user experience to solve the problems raised in the above background art.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] The utility model provides a lighter control circuit, including a control unit, an interface unit, a heating unit, a switch unit, and an indication unit. The interface unit, the heating unit, the switch unit, and the indication unit are all connected to the control unit. The interface unit is connected to the heating unit. The switch unit and the indication unit are connected to the interface unit. The indication unit is connected to the switch unit;

[0006] Among them, the interface unit is connected to a voltage input terminal, and the control unit receives a long-press signal from the switch unit to control the activation of the indication unit and the operation of the heating unit.

[0007] As a preference of the above technical solution, the control unit includes a chip U4, a MOS transistor Q1, and a resistor R2. One end of the resistor R2 is connected to the gate of the MOS transistor Q1 and connected to the PB0 pin of the chip U4, and the other end of the resistor R2 is connected to the source of the MOS transistor Q1. The drain of the MOS transistor Q1 is connected to the heating unit.

[0008] As a preference of the above technical solution, the heating unit includes a heating wire U2 and a capacitor C2. The capacitor C2 is connected in parallel with the heating wire U2, the capacitor C2 is connected in parallel with the interface unit, and the heating wire U2 is connected to the drain of the MOS transistor Q1.

[0009] Preferably, as the above technical solution, the interface unit includes a chip U1, a resistor R1, a resistor R3, a resistor R4, and a resistor R5. The resistor R3 and the resistor R4 are connected in parallel and connected to the CC1 and CC2 pins of the chip U1. One end of the resistor R1 is connected to the VBUS pin of the chip U1, and the other end of the resistor R1 is connected to the resistor R5, the capacitor C2, and the heating wire U2. The resistor R5 is connected to the VIN pin of the chip U4.

[0010] Preferably, as the above technical solution, the indication unit includes a resistor R7, a capacitor C3, and a light-emitting diode U3. The resistor R7 and the capacitor C3 are connected in parallel and connected to the PB5 and VIN pins of the chip U4. The resistor R7 is connected to the light-emitting diode U3.

[0011] Preferably, as the above technical solution, the switch unit includes a capacitor C1, a resistor R6, and a switch KEY1. The capacitor C1 and the resistor R6 are connected in parallel and connected to the VDD pin of the chip U4. The resistor R6 is connected to the switch KEY1, and the switch KEY1 is connected to the PB3 pin of the chip U4.

[0012] Preferably, as the above technical solution, the model of the chip U4 is EN10DYQ, and the model of the MOS transistor Q1 is AO3400.

[0013] Preferably, as the above technical solution, the interface unit includes a TYPE-C male connector or a TYPE-C female socket of a single-row 16P four-pin socket.

[0014] Preferably, as the above technical solution, the operating voltage of the voltage input terminal is 4.7V to 5.5V.

[0015] Preferably, as the above technical solution, when the long-press signal of the switch unit does not disappear, after a delay of 5 to 20 s, the indication unit is turned off and the heating unit stops working.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] By setting a control unit, an interface unit, a heating unit, a switch unit and an indication unit, the interface unit is connected to the voltage input end, and the control unit receives a trigger signal from the switch unit to control the indication unit to turn on and the heating unit to work. Using the interface unit as an access method for the voltage input end can achieve rapid power supply. The switch unit and the indication unit are used in conjunction to intuitively understand the working status of the cigarette lighter. It has fewer parts and a smaller size, which improves the convenience of the product. There is no need for a built-in battery in the cigarette lighter, and it can be used with a smartphone, a laptop computer or a power bank, etc., which saves costs and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural block diagram of the cigarette lighter control circuit proposed in this utility model;

[0019] Figure 2 This is a working principle diagram of the cigarette lighter control circuit proposed in this utility model;

[0020] Figure 3 This is the first side chip diagram of the cigarette lighter control circuit proposed in the utility model;

[0021] Figure 4 This is the second side chip diagram of the cigarette lighter control circuit proposed in this utility model.

[0022] The main component symbols are described as follows:

[0023] 100 - control unit; 110 - interface unit; 120 - heating unit; 130 - switch unit; 140 - indication unit. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] See Figure 1 and Figure 2, the present utility model provides a cigarette lighter control circuit, which includes a control unit 100, an interface unit 110, a heating unit 120, a switch unit 130 and an indicating unit 140. The interface unit 110, the heating unit 120, the switch unit 130 and the indicating unit 140 are all connected to the control unit 100. The interface unit 110 is connected to the heating unit 120. The switch unit 130 and the indicating unit 140 are connected to the interface unit 110. The indicating unit 140 is connected to the switch unit 130;

[0027] Among them, the interface unit 110 is connected to the voltage input terminal, and the control unit 100 receives the trigger signal of the switch unit 130 to control the activation of the indicating unit 140 and the operation of the heating unit 120.

[0028] In this embodiment, the control unit 100 includes a chip U4, a MOS transistor Q1 and a resistor R2. One end of the resistor R2 is connected to the gate of the MOS transistor Q1 and is connected to the PB0 pin of the chip U4. The other end of the resistor R2 is connected to the source of the MOS transistor Q1. The drain of the MOS transistor Q1 is connected to the heating unit. The heating unit 120 includes a heating wire U2 and a capacitor C2. The capacitor C2 is connected in parallel with the heating wire U2. The capacitor C2 is connected in parallel with the interface unit 110. The heating wire U2 is connected to the drain of the MOS transistor Q1. The interface unit 110 includes a chip U1, a resistor R1, a resistor R3, a resistor R4 and a resistor R5. The resistor R3 and the resistor R4 are connected in parallel and connected to the CC1 and CC2 pins of the chip U1. One end of the resistor R1 is connected to the VBUS pin of the chip U1. The other end of the resistor R1 is connected to the resistor R5, the capacitor C2 and the heating wire U2. The resistor R5 is connected to the VIN pin of the chip U4.

[0029] It should be noted that the indicating unit 140 includes a resistor R7, a capacitor C3, and a light-emitting diode U3. The resistor R7 and the capacitor C3 are connected in parallel to the PB5 and VIN pins of the chip U4, and the resistor R7 is connected to the light-emitting diode U3. The switching unit 130 includes a capacitor C1, a resistor R6, and a switch KEY1. The capacitor C1 and the resistor R6 are connected in parallel to the VDD pin of the chip U4, the resistor R6 is connected to the switch KEY1, and the switch KEY1 is connected to the PB3 pin of the chip U4. The model of the chip U4 is the EN10DYQ single-chip microcomputer. The interface unit 110 includes a TYPE-C male connector or a TYPE-C female socket of a single-row 16P four-pin socket. The model of the MOS transistor Q1 is AO3400. The operating voltage of the voltage input terminal is 4.7V to 5.5V. When the trigger signal of the switching unit 130 does not disappear, after a delay of 5 to 20 s, the indicating unit 140 is turned off and the heating unit 120 stops working. Among them, the switching unit 130 can be a push-button switch or other switches. Other switches such as probes and blowing can realize the electronic switch for lighting the heating wire. The trigger signal can be a long press of the button, or sensor induction or pressing, etc., which can be specifically set according to the actual situation and is not limited here.

[0030] Specifically, the chip U4 includes 8 pins. The resistor R7 is connected to the PB5 pin of the chip U4, the capacitor C3 and the resistor R5 are connected to the VIN pin of the chip U4, the capacitor C1 and the resistor R6 are connected to the VDD pin of the chip U4, the resistor R6 and the switch KEY1 are connected to the PB3 pin of the chip U4, the GND pin of the chip U4 is grounded, the PB0 pin of the chip U4 is connected to the resistor R2 and the gate of the MOS transistor Q1. The resistors R3 and R4 are both 5.1KΩ, the capacitors C1 and C3 are both 1uF / 25V, the light-emitting diode U3 can display red, the model of the switch KEY1 is K2_SMD, the heating wire U2 is an RW heating wire, and the circuit structure is simple, improving the working stability of the cigarette lighter control circuit.

[0031] Specifically, as Figure 3 shown, the cigarette lighter control circuit is arranged on the PCB board. The PCB board includes a first side and a second side. The first side can be the front side, and the second side can be the back side. C2, C1, R1, R5, R7, C3, R6, U1, Q1, R2, R3, and R4 are arranged on the first side. As Figure 4 shown, U3 and KEY1 are arranged on the second side. Among them, the above components are installed by using the surface mount technology, which has fewer component numbers and a smaller volume, improving the convenience of the product.

[0032] Among them, the TYPE-C female socket 110 can be connected to a smart phone, a laptop computer, a power bank, etc., and can connect the cigarette lighter to the above terminals for use. After being powered on, long press the switch unit 130, and the heating wire will be immediately lit. At the same time, the LED lamp, that is, the light-emitting diode U3, will light up and show red. If the switch unit 130 is not released, the lamp will automatically go out and the flame will go out after a 10s delay. Pressing the corresponding button of the switch unit 130 again is required to restart the cigarette lighter. Among them, a 10s delay is preferred and can be set according to the actual situation specifically. The working voltage is preferably 5V because too high a voltage will damage the chip and the heating wire, and too low a voltage will cause the heating wire to fail to light the cigarette. The actual product size is 24.8×8.7×8.7mm. The cigarette lighter contains multiple capacitors and resistors and does not require a built-in battery, saving costs. The operation according to the switch unit is simple and easy to implement, and the user experience is also improved.

[0033] As described above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes an equivalent replacement or change, and should be covered by the protection scope of the present invention.

Claims

1. A cigarette lighter control circuit, characterized in that, It includes a control unit, an interface unit, a heating unit, a switch unit and an indicating unit. The interface unit, the heating unit, the switch unit and the indicating unit are all connected to the control unit. The interface unit is connected to the heating unit. The switch unit and the indicating unit are connected to the interface unit. The indicating unit is connected to the switch unit; Among them, the interface unit is connected to the voltage input terminal, and the control unit receives the trigger signal of the switch unit to control the activation of the indicating unit and the operation of the heating unit.

2. The lighter control circuit according to claim 1, wherein, The control unit includes a chip U4, a MOS transistor Q1 and a resistor R2. One end of the resistor R2 is connected to the gate of the MOS transistor Q1 and connected to the PB0 pin of the chip U4. The other end of the resistor R2 is connected to the source of the MOS transistor Q1. The drain of the MOS transistor Q1 is connected to the heating unit.

3. The lighter control circuit according to claim 2, wherein, The heating unit includes a heating wire U2 and a capacitor C2. The capacitor C2 is connected in parallel with the heating wire U2. The capacitor C2 is connected in parallel with the interface unit. The heating wire U2 is connected to the drain of the MOS transistor Q1.

4. The lighter control circuit according to claim 3, characterized in that, The interface unit includes a chip U1, a resistor R1, a resistor R3, a resistor R4 and a resistor R5. The resistor R3 and the resistor R4 are connected in parallel and connected to the CC1 and CC2 pins of the chip U1. One end of the resistor R1 is connected to the VBUS pin of the chip U1. The other end of the resistor R1 is connected to the resistor R5, the capacitor C2 and the heating wire U2. The resistor R5 is connected to the VIN pin of the chip U4.

5. The lighter control circuit according to claim 4, characterized in that, The indicating unit includes a resistor R7, a capacitor C3 and a light-emitting diode U3. The resistor R7 and the capacitor C3 are connected in parallel and connected to the PB5 and VIN pins of the chip U4. The resistor R7 is connected to the light-emitting diode U3.

6. The lighter control circuit according to claim 5, characterized in that, The switch unit includes a capacitor C1, a resistor R6 and a switch KEY1. The capacitor C1 and the resistor R6 are connected in parallel and connected to the VDD pin of the chip U4. The resistor R6 is connected to the switch KEY1. The switch KEY1 is connected to the PB3 pin of the chip U4.

7. The lighter control circuit according to claim 6, wherein The model of the chip U4 is EN10DYQ, and the model of the MOS transistor Q1 is AO3400.

8. The lighter control circuit according to claim 1, wherein The interface unit includes a TYPE-C male connector or a TYPE-C female socket of a single-row 16P four-pin socket board.

9. The lighter control circuit according to claim 1, wherein The operating voltage of the voltage input terminal is 4.7V to 5.5V.

10. The lighter control circuit according to claim 1, wherein When the trigger signal of the switch unit does not disappear, after a delay of 5 to 20 s, the indicating unit is turned off and the heating unit stops operating.

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