Electronic cigarette lock mechanism unlocking circuit

Abstract

The application discloses an electronic cigarette locking and unlocking circuit, which comprises a plug interface having a first input end and a second input end, the first input end being connected with a first output end through a first lead wire, and the second input end being connected with a second output end through a second lead wire; a processor comprising a first pin, a second pin and a level output pin, the first pin being connected with the first output end, the second pin being connected with the second output end, and the level output pin being used for outputting a high level or a low level; a heating control circuit having a first control end, a power input end and a heating output end, the first control end being connected with the level output pin, the power input end being connected with a power supply, and the heating output end being connected with a heating component; when the first input end and the second input end receive different frequency pulse signals inputted by an external environment, the processor outputs different level signals through the level output pin, and controls the conduction or disconnection between the power input end and the heating output end, so that dry burning of an atomization component in an assembling process is prevented.

Description

Technical Field

[0001] This application relates to the field of atomization technology, and in particular to an unlocking circuit for an electronic cigarette lock. Background Technology

[0002] An electronic cigarette includes a casing, inside which are a battery, a circuit board, an atomizing component, and an e-liquid storage component. The circuit board is connected to the battery, allowing it to control the battery's output mode. The battery is connected to the atomizing component, providing it with power. The atomizing component includes a heating coil and wicking cotton. The e-liquid storage component is typically made of wicking cotton containing e-liquid. The atomizing component is located within the e-liquid storage component, facilitating the flow of e-liquid from the storage component into the wicking cotton.

[0003] The upper part of the outer shell is equipped with a mouthpiece, and the lower part of the outer shell is equipped with a base. An air outlet channel is provided between the seal and the mouthpiece, and an atomizing component is installed in the air outlet channel. An air inlet channel is provided in the base, and an airflow sensor (microphone) is installed in the air inlet channel. The airflow sensor is connected to a circuit board. When the mouth inhales through the mouthpiece, outside air enters the air outlet channel through the air inlet channel. When the air flows into the air inlet channel, a pressure difference is generated between the air pressure in the air inlet channel and the outside atmospheric pressure. The airflow sensor is triggered, and the airflow sensor sends an electrical signal to the circuit board. The circuit board notifies the battery to provide power to the atomizing component, and the atomizing component starts to work, heating the e-liquid into a gaseous state.

[0004] In the assembly process of e-cigarettes, the first step is to solder the battery, circuit board, and atomization component together in sequence. The second step is to assemble the e-liquid storage component and the atomization component together. During the first assembly process, since the microphone is pre-soldered on the circuit board, changes in external air pressure can easily trigger the microphone. After the microphone is triggered, the atomization component starts to work and generates heat. However, the e-liquid storage component has not yet been assembled with the atomization component, which can easily cause the heating coil to burn out or even burn the wicking cotton, rendering the atomization component unusable.

[0005] Therefore, in order to address the above problems, it is necessary to design an electronic cigarette with an unlocking circuit for locking the electronic cigarette, in order to overcome the aforementioned defects. Utility Model Content

[0006] The main objective of this application is to provide an unlocking circuit for electronic cigarette locks to prevent the atomizing components from burning out during assembly.

[0007] To achieve the above objectives, this application proposes an unlocking circuit for an electronic cigarette lock, comprising:

[0008] A plug-in interface has a first input terminal and a second input terminal. The first input terminal is connected to a first output terminal through a first lead, and the second input terminal is connected to a second output terminal through a second lead.

[0009] A processor includes a first pin, a second pin, and a level output pin. The first pin is connected to a first output terminal, the second pin is connected to a second output terminal, and the level output pin is used to output a high level or a low level.

[0010] A heating control circuit has a first control terminal, a power input terminal, and a heating output terminal. The first control terminal is connected to a level output pin, the power input terminal is connected to a power supply, and the heating output terminal is connected to a heating component.

[0011] When the first input terminal and the second input terminal receive pulse signals of different frequencies from the outside, the processor outputs different level signals through the level output pin to control the conduction or disconnection between the power input terminal and the heat output terminal.

[0012] The processor also includes a sensing pin connected to a microphone. The microphone has a positive voltage pin, a negative voltage pin, and a microphone signal output pin. The sensing pin is connected to the microphone signal output pin, the positive voltage pin is connected to the power supply, and the negative voltage pin is grounded.

[0013] The heating control circuit includes a P-MOSFET, which includes a gate, a source, and a drain. The gate is connected to a level output pin through a first resistor, the source is connected to a power supply, and the drain is connected to a heating output terminal.

[0014] A second resistor with a resistance of 1 megohm is connected between the power input terminal and the heat output terminal. A third resistor with a resistance of 10,000 ohms is also connected between the power supply and the level output pin.

[0015] The processor also includes a detection pin, which is connected to the heat output terminal via a fourth resistor to detect the voltage / current of the heat output terminal.

[0016] The interface also includes a third input terminal, which is connected to the charging management chip via a third lead. The processor also includes a charging management pin, which is connected to the charging management chip. When the charging reaches saturation, the processor sends a signal to the charging management chip to stop charging via the charging management pin.

[0017] The third input terminal is connected to the processor's charging insertion detection pin via a fifth resistor, and the charging insertion detection pin is also grounded via a sixth resistor.

[0018] The charging management chip is provided with a charging enable pin, which is connected to the charging port pin of the processor. The charging enable pin is also grounded through a seventh resistor.

[0019] The first and second input terminals of this application receive pulse signals of different frequencies from external input. The processor outputs different level signals through the level output pin to control the conduction or disconnection between the power input terminal and the heating output terminal. This can effectively prevent the heating component between the power input terminal and the heating output terminal from starting and prevent the atomizing component from burning out. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the processor in an embodiment of this design;

[0022] Figure 2 This is a schematic diagram of the left half of the plug interface in an embodiment of this design;

[0023] Figure 3 This is a schematic diagram of the right half of the plug interface in an embodiment of this design;

[0024] Figure 4 This is a circuit diagram of the heating control circuit in an embodiment of this design;

[0025] Figure 5 The circuit diagram of the microphone designed for this project.

[0026] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0030] the following Figure 1-5 This invention discloses an electronic cigarette lock unlocking circuit. For ease of understanding, the structure of the electronic cigarette in this design is first described. The electronic cigarette includes a power supply component, which includes a housing containing a battery and a circuit board. The circuit board is equipped with a microphone connected to the circuit board, which in turn connects to the battery, allowing the circuit board to control the battery's output mode. Two leads are soldered to the upper part of the circuit board, connecting to the atomizer core. The microphone senses changes in air pressure within the airway. When the air pressure changes, the microphone sends an electrical signal to the circuit board, which then controls the battery to output current or voltage to the atomizer core. When the atomizer core is powered on, it generates heat, heating the e-liquid in the oil storage component into vapor, thus achieving e-liquid atomization.

[0031] This design provides an unlocking circuit for an electronic cigarette lock, comprising: a connector having a first input terminal and a second input terminal; the first input terminal is connected to a first output terminal via a first lead, and the second input terminal is connected to a second output terminal via a second lead; the connector can be a USB port in this design, mounted on a charging board, or fixed to the end of the electronic cigarette; the connector can also transmit data, and when connected to an external signal control device, the signal emitted by the signal control device can be transmitted through the connector, for example, the external signal control device can emit a square wave / rectangular wave, the period of which can be set as needed; the first input terminal is CC1, and the second input terminal is CC2. The connector is divided into two parts. Figure 2 The left half Figure 3 The right half is the first half. The left and right halves together constitute the entire circuit. The left and right halves are identified by AA.

[0032] A processor includes a first pin, a second pin, and a level output pin. The first pin is connected to a first output terminal, the second pin is connected to a second output terminal, and the level output pin PA0 is used to output a high or low level. The processor also has other pins, which will be introduced below. The processor has predetermined processing rules. The processor outputs a high or low level through the level output pin according to different signals sent by the signal control device received. The first pin is PA2-SWC / T1_CH4, the second pin is PB6-SWD / ADC_IN6, and the level output pin is PA0_H1+_CRTL. In this design, the first and second pins can be interchanged to achieve signal transmission. The processor also includes a power supply pin, VDD, and the output terminal of the power supply pin is BAT42.

[0033] A heating control circuit has a first control terminal, a power input terminal, and a heating output terminal. The first control terminal is connected to the level output pin PA0_H1+_CRTL. The power input terminal is connected to a power supply and is connected to the power supply pin VDD, corresponding to BAT42. The heating output terminal is connected to a heating component, and the corresponding port of the heating output terminal is H1+2 or H1+3. The heating component is a heating wire, a heating mesh, etc. The heating wire is bent into a spiral cylindrical shape, and the outside of the heating wire is covered with oil-absorbing cotton. The oil-absorbing cotton is used to absorb e-liquid. When the heating wire is energized, it generates heat, which heats the e-liquid in the oil-absorbing cotton into smoke.

[0034] When the first and second input terminals receive pulse signals of different frequencies from the outside, the processor outputs different level signals through the level output pin to control the conduction or disconnection between the power input terminal and the heating output terminal. When the e-cigarette is not fully assembled, an external signal control device sends a lock signal to the processor, such as transmitting a square wave signal. The processor outputs a high level through the level output pin, keeping the power input terminal and the heating output terminal disconnected, and the heating wire is not energized, effectively preventing the heating wire from burning dry. When the e-cigarette is fully assembled, an external signal control device sends an unlock signal to the processor, such as transmitting a square wave. After unlocking, when the microphone is effectively triggered, the processor outputs a low level through the level output pin, keeping the power input terminal and the heating output terminal conductive. The battery supplies power to the heating wire through the circuit board, and the heating wire generates heat, heating the e-liquid in the wicking cotton into a gaseous state. The signal control device completes the connection through the first and second input terminals of the connector, then reaches the first pin through the first lead and the first output terminal, and reaches the second pin through the second input terminal and the second output terminal, entering the processor.

[0035] The processor also includes a sensing pin, PA3_MIC_IN1, which is connected to the microphone. The microphone has a positive voltage pin M+, a negative voltage pin M-, and a microphone signal output pin M0. The sensing pin is connected to the microphone signal output pin, the positive voltage pin is connected to the power supply, and the negative voltage pin is grounded. When the microphone senses a change in external air pressure and the e-cigarette is in an unlocked state, the microphone signal output pin emits an electrical signal, which is transmitted to the processor through the sensing pin. The processor outputs a low level through its level output pin, and the power input and heating output terminals remain connected. The battery supplies power to the heating coil through the circuit board, and the heating coil generates heat, atomizing the e-liquid in the wicking cotton. If the e-cigarette is in a locked state, even if the microphone senses a change in external air pressure and emits an electrical signal through its signal output pin, which is transmitted to the processor through the sensing pin, the processor will not output a low level through its level output pin because of the pre-set locking rules. The level output pin will remain at a high level, and the power input and heating output terminals will remain disconnected, preventing the heating coil from being powered.

[0036] The heating control circuit includes a P-MOSFET, which comprises a gate, a source, and a drain. The gate is connected to a level output pin via a first resistor, R24. The source is connected to the power supply, and the drain is connected to the heating output terminal. When the gate is in a low-level state, the source and drain are connected, and the power input terminal and the heating output terminal remain connected. When the gate is in a high-level state, the source and drain are disconnected, and the power input terminal and the heating output terminal remain disconnected. By controlling the opening and closing of the power input terminal and the heating output terminal through the P-MOSFET, the operation of the heating wire is controlled.

[0037] A second resistor, R26, with a resistance of 1 megohm, is connected between the power input terminal and the heating output terminal. The presence of the second resistor ensures that the power input terminal and the heating output terminal maintain a very small current, similar to an open circuit, effectively preventing the heating wire from burning out due to energization. When the source and drain are connected, the power input terminal, source, drain, and heating output terminal form a loop with very low resistance. A third resistor, R22, with a resistance of 10,000 ohms, is also connected between the power supply and the level output pin.

[0038] The second resistor R26 acts as a pull-up resistor. When no cartridge is connected or no heating element is installed, the cartridge output is at a high level, and the heating output H1+2 or H1+3 is essentially an open circuit with a very high voltage. When a cartridge is connected, the cartridge output is at a low level (when the heating is not turned on). The heating output H1+2 or H1+3 and R26 form a circuit, which can be used to determine whether the cartridge is connected or not.

[0039] The third resistor R22 acts as a pull-up resistor. When the heating logic is not turned on, the third resistor R22 is connected to the battery terminal and the gate, which will maintain the high level of the gate, keeping the P-MOS transistor in the off state and preventing heating.

[0040] The processor also includes a detection pin, PA4 / ADC_IN2, which is connected to the heat output terminal via a fourth resistor, R17, to detect the voltage / current at the heat output terminal. The resistance of the fourth resistor is 1000 ohms. The voltage at the heat output terminal is detected by voltage division through the fourth resistor.

[0041] The interface also includes a third input terminal, VBUS4, which is connected to a charging management chip (U3BM9073) via a third lead. The processor also includes a charging management pin, PB1 / ADC_IN0, which is connected to the charging management chip. Specifically, the charging management pin is connected to the CHRG pin of the charging management chip. When charging reaches saturation, the processor sends a stop-charging signal to the charging management chip via this pin. The third input terminal runs parallel to and is independent of the first and second input terminals. The third input terminal has different functions from the first and second input terminals; it is used for charging, allowing current from the external charger to pass through and transmitting current, while the first and second input terminals are used for signal transmission. The charging management chip is equipped with a charging enable pin, which is EN in this design. The charging enable pin is connected to the processor's charging port pin PB4. The charging enable pin can send a charging electrical signal to the processor, such as a continuous charging voltage. The charging enable pin is also grounded through a seventh resistor, R6, with a resistance of 100,000 ohms. It is in a pull-down state and is enabled by default (when the EN pin of the charging management chip does not output a high level).

[0042] The third input terminal is connected to the processor's charging insertion detection pin PA7 / ADC_IN4 via a fifth resistor, which is R3. The charging insertion detection pin is also grounded via a sixth resistor R4. For example, the resistance of the fifth resistor is 51,000 ohms and the resistance of the sixth resistor is 100,000 ohms.

[0043] The fifth and sixth resistors act as voltage dividers. When a 5V charging signal is input, the PA7 / ADC_IN4 pin will detect a high level, indicating that charging is valid and the processor enters the charging processing mode. When no 5V signal is input, the PA7 / ADC_IN4 pin will detect a low level, indicating that charging is invalid and exiting the charging processing mode.

[0044] To further understand the processor, model number IC_MS32C001F14U6-C-QFN20, the specific pin configuration of the processor is as follows. For ease of explanation, the pins are numbered from 1 to 20. For example, pin VSS (number 3) is grounded; pin PB6-SWD / ADC_IN6 (number 4); pin PA2-SWC / T1_CH4 (number 7); pin PB4 (number 9); pin PB1 / ADC_IN0 (number 11); pin PA0 (number 13); pin PA3_MIC_IN1 (number 13); pin PA3 / ADC_IN1 (number 15); pin PA4 / ADC_IN2 (number 16); pin PA7 / ADC_IN4 (number 18); and the other pins are marked on the diagram and will not be described in detail.

[0045] For example, during the assembly process, when it is necessary to lock the machine, an external signal control device sends a lock signal to the processor. For example, the signal can reach the processor through the first input terminal CC1, the first lead, the first output terminal, and the first pin, and through the second input terminal CC2, the second lead, the second output terminal, and the second pin. Alternatively, the first and second pins can be interchanged. After receiving the lock signal, the processor outputs a high-level signal on pin PA0 (number 13). The power input terminal (BAT42) and the heating output terminal (H1+2 or H1+3) remain disconnected, and no current flows through the heating wire, effectively preventing the heating wire from burning out. After the electronic cigarette is assembled, an unlock signal is sent to the processor via an external signal control device. For example, the signal reaches the processor through the first input terminal CC1, the first lead, the first output terminal, and the first pin; and through the second input terminal CC2, the second lead, the second output terminal, and the second pin. After receiving the unlock signal, if the microphone signal is valid, pin PA0 (number 13) outputs a low-level signal. The power input terminal (BAT42) and the heating output terminal are connected between H1+2 or H1+3. The battery supplies power to the heating wire, which generates heat and atomizes the e-liquid in the wicking cotton. At this time, normal vaping can be performed. For example, if triggered by the microphone, the microphone signal output pin M0 sends an electrical signal to pin PA3 / ADC_IN1 (number 15). The electrical signal enters the processor, and pin PA0 (number 13) of the processor outputs a low-level signal. When the gate of the P-MOS transistor is in a low-level state, the source and drain are connected. The power input terminal and the heating output terminal remain connected, and the heating wire can generate heat normally.

[0046] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An unlocking circuit for an electronic cigarette lock, characterized in that, include: A plug-in interface has a first input terminal and a second input terminal. The first input terminal is connected to a first output terminal through a first lead, and the second input terminal is connected to a second output terminal through a second lead. A processor includes a first pin, a second pin, and a level output pin. The first pin is connected to a first output terminal, the second pin is connected to a second output terminal, and the level output pin is used to output a high level or a low level. A heating control circuit has a first control terminal, a power input terminal, and a heating output terminal. The first control terminal is connected to a level output pin, the power input terminal is connected to a power supply, and the heating output terminal is connected to a heating component. When the first input terminal and the second input terminal receive pulse signals of different frequencies from the outside, the processor outputs different level signals through the level output pin to control the conduction or disconnection between the power input terminal and the heat output terminal.

2. The electronic cigarette lock unlocking circuit according to claim 1, characterized in that, The processor also includes a sensing pin connected to a microphone. The microphone has a positive voltage pin, a negative voltage pin, and a microphone signal output pin. The sensing pin is connected to the microphone signal output pin, the positive voltage pin is connected to the power supply, and the negative voltage pin is grounded.

3. The electronic cigarette lock unlocking circuit according to claim 1, characterized in that, The heating control circuit includes a P-MOSFET, which includes a gate, a source, and a drain. The gate is connected to a level output pin through a first resistor, the source is connected to a power supply, and the drain is connected to a heating output terminal.

4. The electronic cigarette lock unlocking circuit according to claim 3, characterized in that, A second resistor with a resistance of 1 megohm is connected between the power input terminal and the heat output terminal. A third resistor with a resistance of 10,000 ohms is also connected between the power supply and the level output pin.

5. The electronic cigarette lock unlocking circuit according to claim 1, characterized in that, The processor also includes a detection pin, which is connected to the heat output terminal via a fourth resistor to detect the voltage / current of the heat output terminal.

6. The electronic cigarette lock unlocking circuit according to claim 1, characterized in that, The interface also includes a third input terminal, which is connected to the charging management chip via a third lead. The processor also includes a charging management pin, which is connected to the charging management chip. When the charging reaches saturation, the processor sends a signal to the charging management chip to stop charging via the charging management pin.

7. The electronic cigarette lock unlocking circuit according to claim 6, characterized in that, The third input terminal is connected to the processor's charging insertion detection pin via a fifth resistor, and the charging insertion detection pin is also grounded via a sixth resistor.

8. The electronic cigarette lock unlocking circuit according to claim 6, characterized in that, The charging management chip is provided with a charging enable pin, which is connected to the charging port pin of the processor. The charging enable pin is also grounded through a seventh resistor.

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