Aerosol generating device

Abstract

The utility model provides an aerosol generating device. A reset circuit of the device comprises a key input assembly, a long key working assembly and a hardware reset assembly. A key switch element in the key input assembly responds to the operation of a user on the external key to switch the on-off state. And the long key working assembly is electrically connected with the key switch element. The control end of a first switch element in the hardware reset assembly is electrically connected with the long key working assembly, and the input end of the first switch element is electrically connected with the hardware reset end of the micro-control unit; when the micro-control unit works normally, the first switch element is switched on under the action of the switch-on control signal, so that the hardware reset end has a first level, and the reset activation of the micro-control unit is realized, and the circuit can generate a function signal to the micro-control unit according to user operation when the micro-control unit works normally; and the micro-control unit can be reset and activated according to the long-press operation of the user when the micro-control unit crashes, so that the influence of equipment crashes on the user is reduced, and the reliability of the aerosol generating device is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of aerosol generation technology, and in particular to an aerosol generation device. Background Technology

[0002] Current aerosol generating devices (such as e-cigarettes) typically incorporate a microcontroller as a microcontroller unit, along with buttons for functions such as checking battery level and powering on / off. The microcontroller unit is usually reset via a monitoring chip (also known as a watchdog timer) in conjunction with other related software.

[0003] However, in actual production and application, the microcontroller unit of the aerosol generating device may malfunction due to various reasons such as static electricity or electromagnetic pulse interference, which greatly reduces the reliability of the aerosol generating device. Utility Model Content

[0004] This invention provides an aerosol generating device for resetting and activating a microcontroller unit.

[0005] According to the present invention, an aerosol generating device is provided, including a housing and a button disposed on the housing, wherein a microcontroller unit and a reset circuit for resetting the microcontroller unit are disposed inside the housing;

[0006] The reset circuit includes:

[0007] A key input component includes a key switch element, which switches on / off states in response to user operations on the peripheral key.

[0008] A long button working component is electrically connected to the button switch element. The long button working component is configured to generate a conduction control signal when the button switch element remains on for a period of time exceeding a preset time.

[0009] The hardware reset component includes a first switching element, the control terminal of which is electrically connected to the long button working component, and the input terminal of which is electrically connected to the hardware reset terminal of the microcontroller unit. The first switching element is turned on under the action of the conduction control signal, so that the hardware reset terminal has a first level, and the first level causes the microcontroller unit to reset.

[0010] Optionally, the long button operating component includes a second switching element and a delay capacitor;

[0011] The second switching element and the delay capacitor are connected in series between the power supply terminal and the reference ground. The control terminal of the second switching element is electrically connected to the push-button switch element. The first connection point between the second switching element and the delay capacitor is also electrically connected to the control terminal of the first switching element.

[0012] The second switching element is turned on in response to the turn-on of the push-button switch element, so that the power supply terminal continuously charges the delay capacitor for a preset time, thereby raising the potential of the conduction control signal of the first connection point to the conduction potential of the first switching element.

[0013] Optionally, the long button working component further includes: a third switching element;

[0014] The third switching element is connected between the first connection point and the reference ground. The control terminal of the third switching element is electrically connected to the push-button switch element. The third switching element turns on in response to the turn-off of the push-button switch element to discharge the charge of the delay capacitor, thereby causing the first switching element to turn off again.

[0015] Optionally, the capacitance value of the delay capacitor is positively correlated with the preset time.

[0016] Optionally, the long button working component further includes a first resistor and a second resistor;

[0017] The first resistor is connected between the second switching element and the power supply terminal;

[0018] The second resistor is connected between the first connection point and the reference ground;

[0019] The resistance values ​​of the first resistor and the second resistor are related to the preset time.

[0020] Optionally, the first switching element includes a first N-type MOS transistor, the gate of which is electrically connected to the long button working component; the drain of which is electrically connected to the power supply terminal and the hardware reset terminal of the microcontroller; and the source of which is electrically connected to the reference ground.

[0021] Optionally, the second switching element includes a second P-type MOS transistor, the gate of which is electrically connected to the push-button switch element; the source of which is electrically connected to the power supply terminal; and the drain of which is electrically connected to the reference ground via the delay capacitor.

[0022] Optionally, the third switching element includes a third N-type MOS transistor, the gate of which is electrically connected to the push-button switch element; the source of which is electrically connected to the reference ground; and the drain of which is electrically connected to the first connection point.

[0023] Optionally, the push-button switch element is electrically connected to the push-button input terminal of the microcontroller unit. The push-button input component is configured to output a corresponding push-button signal to the push-button input terminal based on the conduction duration and the number of on / off cycles of the push-button switch element when the duration of conduction of the push-button switch element is less than the preset time. The push-button signal is used to instruct the microcontroller unit to perform at least one of the functions of checking battery level, normal power-on, and normal power-off.

[0024] Optionally, the key input component further includes a third resistor, which and the key switch element are connected in series between the power supply terminal and the reference ground; the second connection point between the third resistor and the key switch element serves as an output terminal and is electrically connected to the key input terminal.

[0025] The aerosol generating device provided by this utility model includes a housing and peripheral buttons disposed on the housing. A microcontroller unit and a reset circuit are also disposed within the housing. The reset circuit includes a button input component, a long-press working component, and a hardware reset component. In the button input component, a button switch element is electrically connected to the button input terminal of the microcontroller unit. The button switch element responds to user operations on the peripheral buttons, switching its on / off state. The long-press working component is electrically connected to the button switch element and is configured to generate a conduction control signal when the button switch element remains on for a preset time or longer. In the hardware reset component, the control terminal of a first switch element is electrically connected to the long-press working component, and the input terminal of the first switch element is electrically connected to the hardware reset terminal of the microcontroller unit. The first switch element conducts under the action of the conduction control signal, giving the hardware reset terminal a first level, thereby resetting and activating the microcontroller unit. This circuit can reset and activate the microcontroller unit based on the user's long-press operation when the microcontroller unit malfunctions, reducing the impact of device malfunctions on the user and greatly improving the reliability of the device.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of an aerosol generating device provided in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of another aerosol generating device provided in the embodiments of this application;

[0030] Figure 3 An external schematic diagram of another aerosol generating device provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of a reset circuit provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of another reset circuit provided in an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of another reset circuit provided in an embodiment of this application;

[0034] Figure 7 This is a schematic diagram of another reset circuit provided in an embodiment of this application;

[0035] Figure 8 This is a schematic diagram of another reset circuit provided in an embodiment of this application;

[0036] Figure 9 A schematic diagram of a simulation model of a reset circuit provided in an embodiment of this application;

[0037] Figure 10 The waveform diagrams of signals at various points in a simulation model of a reset circuit provided in this application embodiment are shown. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this patent application, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0039] It should be noted that in the specification, claims, and accompanying drawings of this utility model, when an element is described as "fixed to" or "connected to" another element, it can be directly on the other element or one or more intermediate elements may exist therebetween. When an element is described as "electrically connected" to another element, it can be directly electrically connected to the other element or one or more intermediate elements may exist therebetween. The terms "upper," "lower," "left," "right," "inner," "outer," "first," "second," etc., used in this specification are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or components is not necessarily limited to those steps or components explicitly listed, but may include other steps or components not explicitly listed or inherent to such processes, methods, products, or devices.

[0040] To address the problems mentioned in the background art, this utility model proposes an aerosol generating device, in which a reset circuit is used to reset the microcontroller unit (MCU). To provide a clearer illustration of the reset function related technical solutions of the aerosol generating device later, a brief introduction to the basic functions and common components of the aerosol generating device is given here using an embodiment.

[0041] Figure 1 This is a schematic diagram of an aerosol generating device provided in an embodiment of this application, as shown below. Figure 1 As shown, the aerosol generating device includes a nozzle 11, a liquid storage unit 12, a liquid transfer unit 13, a heating element 14, a circuit 15, a battery cell 16, and a charging interface 17. Figure 1 In one example, the aforementioned components are integrally formed, and the aerosol generating device is a typical integrated device. In another example, the aerosol generating device includes an atomizer and a power supply assembly detachably connected to the atomizer. The atomizer is often referred to as a cartridge, and the power supply assembly is often referred to as a device. The circuit 15, the battery 16, and the charging interface 17 are located in the power supply assembly. The mouthpiece 11, the liquid storage unit 12, the liquid delivery unit 13, and the heating element 14 are located in the atomizer.

[0042] The nozzle 11 is used for users to inhale the aerosol generated by heating.

[0043] The liquid storage unit 12 is used to store a liquid aerosol forming matrix capable of generating aerosols. The liquid aerosol forming matrix can be a liquid containing tobacco-containing substances, including volatile tobacco flavor components, or a liquid containing non-tobacco substances. For example, the liquid aerosol forming matrix may include water, solvents, ethanol, plant extracts, flavorings, fragrances, or vitamin mixtures. Flavorings may include, but are not limited to, menthol, peppermint oil, spearmint oil, and various fruit flavoring components. Fragrances may include ingredients capable of providing the user with a variety of flavors or aromas. Vitamin mixtures may be substances containing at least one of vitamins A, B, C, and E, but are not limited to. Additionally, the liquid aerosol forming matrix may include aerosol forming agents such as glycerol and propylene glycol.

[0044] The liquid transfer unit 13 is capable of transferring the liquid aerosol stored in the liquid storage unit 12 to the heating element 14 to form a matrix. For example, the liquid transfer unit 13 can be made of cotton fiber, ceramic fiber, glass fiber, or porous materials such as porous ceramics or porous glass, but is not limited thereto. The liquid transfer unit 13 can be constructed in a tubular, plate-like, or other regular or irregular shape.

[0045] The heating element 14 is a component used to heat the liquid aerosol forming matrix transferred through the liquid transfer unit 13. For example, the heating element 14 can be a metal wire, a metal plate, a ceramic heater, etc., but is not limited to these. Alternatively, the heating element 14 can be made of a conductive heating wire such as nickel-chromium wire, and can be arranged in a structure wound around the liquid transfer unit 13. The heating element 14 can be heated by an electric current supply, and heat is transferred to the liquid aerosol forming matrix in contact with the heating element 14 to heat the liquid aerosol forming matrix, thereby generating an aerosol.

[0046] Circuit 15 controls the overall operation of the aerosol generating device. Specifically, circuit 15 controls not only the operation of the battery cell 16 and the heating element 14, but also the operation of other components in the aerosol generating device. Furthermore, circuit 15 can determine whether the aerosol generating device is operable by checking the status of its components.

[0047] Circuit 15 includes at least one microcontroller unit. The microcontroller unit may be, but is not limited to, a combination of a microcontroller and a memory storing a program executable in the microcontroller, wherein the memory may be integrated into the microcontroller or independent of the microcontroller.

[0048] Battery cell 16 provides power for operating the aerosol generating apparatus. For example, battery cell 16 can provide power to heat heating element 14 and can provide the power required to operate circuit 15. In addition, battery cell 16 can provide the power required to operate sensors, motors, etc. provided in the aerosol generating apparatus.

[0049] Cell 16 may be, but is not limited to, a lithium iron phosphate (LiFePO4) cell. For example, cell 16 may be a lithium cobalt oxide (LiCoO2) cell or a lithium titanate cell. Cell 16 may be a rechargeable cell.

[0050] The charging interface 17 has a voltage output terminal configured to output a charging voltage. Specifically, when the charging interface 17 is electrically connected to an external power source, such as when an external power adapter is inserted into the charging interface 17, the voltage output terminal of the charging interface 17 outputs a 5V charging voltage; when the electrical connection between the charging interface 17 and the external power source is disconnected, such as when the external power adapter is unplugged from the charging interface 17, the voltage output terminal of the charging interface 17 outputs a 0V charging voltage.

[0051] It should be noted that, Figure 1 Only components relevant to this embodiment are shown. Those skilled in the art will understand that the aerosol generating apparatus may also include, in addition to... Figure 1 Other common components besides those shown.

[0052] For example, the aerosol generating device also includes a suction detector (not shown) to detect the user's suction action and generate a corresponding electrical signal, i.e., to detect whether the aerosol generating device is being suctioned. This allows circuit 15, such as a microcontroller unit, to control the operation of the battery cell 16, heating element 14, etc., based on the electrical signal. For example, it controls the battery cell 16 to provide power to the heating element 14, so that the heating element 14 heats the atomized liquid aerosol to form a matrix. The suction detector can be a common pressure sensor, differential pressure sensor, airflow sensor, etc. When the aerosol generating device is being suctioned, the airflow enters through the charging interface 17, flows through the battery cell 16, circuit 15, heating element 14, etc., and then flows out through the nozzle 11. The dashed arrow in the figure roughly shows this airflow path.

[0053] Figure 2 This is a schematic diagram of another aerosol generating device provided in the embodiments of this application.

[0054] like Figure 2 As shown, the aerosol generating device includes:

[0055] Chamber A contains a removable aerosol-generated article B.

[0056] The aerosol-generating article B preferably uses a solid aerosol-forming matrix, which may include one or more of the following: powder, granules, fragments, strips, or sheets of vanilla leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or, the solid aerosol-forming matrix may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the matrix is ​​heated.

[0057] When the aerosol generating article B is received in the chamber A, the heating element 14 can be inserted into the aerosol generating article B for heating to generate aerosol.

[0058] It should be noted that the heating method of the heating element 14 includes, but is not limited to, resistance heating, electromagnetic heating, infrared heating, and air heating. The shape of the heating element 14 includes, but is not limited to, needle-shaped, pin-shaped, or sheet-shaped.

[0059] It should also be noted that, with Figure 2 Unlike the example, in other examples, it is also possible for the heating element 14 to be configured to heat at least a portion of the aerosol-generating article B, i.e., circumferential heating or peripheral heating, etc.

[0060] Cell 16 is used for power supply; cell 16 can be a rechargeable cell.

[0061] Circuit 15 is used to control the aerosol generating device; for example, to control the battery cell 16 to provide power to the heating element 14.

[0062] Circuit 15 includes a microcontroller unit. The microcontroller unit is a hardware component that controls the overall operation of the aerosol generation device. The microcontroller unit can be implemented as an array of logic gates, or it can be implemented as a combination of a microcontroller and a memory storing a program executable in the microcontroller. Those skilled in the art will understand that the microcontroller unit can be implemented in other forms of hardware.

[0063] The charging interface 17 has a voltage output terminal configured to output a charging voltage. Specifically, when the charging interface 17 is electrically connected to an external power source, such as when an external power adapter is inserted into the charging interface 17, the voltage output terminal of the charging interface 17 outputs a 5V charging voltage; when the electrical connection between the charging interface 17 and the external power source is disconnected, such as when the external power adapter is unplugged from the charging interface 17, the voltage output terminal of the charging interface 17 outputs a 0V charging voltage.

[0064] Therefore, the following sections will focus on the content related to the reset function of the microcontroller unit.

[0065] Figure 3 This is an external schematic diagram of another aerosol generating device provided in an embodiment of the present invention. Based on the foregoing embodiments, refer to... Figure 3The aerosol generating device also includes a housing 106 and an external button 107 disposed on the housing 106. The housing 106 houses a microcontroller unit and a reset circuit for resetting the microcontroller unit. The microcontroller unit and the reset circuit are important components of the circuitry in the aerosol generating device of the aforementioned embodiments. Exemplarily, in some embodiments, the external button 107 can be a movable button cap disposed on the outside of the housing 106, whose pressing and releasing action is linked to the on / off state of a button switch element in the circuit. For example, the movable button cap is attached to the button of the button switch element, and its pressing or releasing is synchronized with the pressing and releasing of the button in the button switch element. In other embodiments, the external button 107 can also be integrated with the button switch element in the reset circuit into a single device. The button portion of this device serves as an external button, disposed at the opening of the housing 106 for user operation.

[0066] Figure 4 This is a schematic diagram of a reset circuit provided in an embodiment of this application, combined with... Figure 3 and Figure 4 At least a portion of the reset circuit 100 is disposed within the housing 106 of the aerosol generating device. The reset circuit 100 includes a key input component 101, a long key working component 102, and a hardware reset component 103.

[0067] The key input component 101 includes a key switch element 104, which is electrically connected to the key input terminal KEY_IN of the microcontroller unit. The key switch element 104 switches the on / off state in response to the user's operation of the peripheral key 107.

[0068] The long button working component 102 is electrically connected to the button switch element 104. The long button working component 102 is configured to generate a conduction control signal when the button switch element 104 remains on for a period of time longer than a preset time.

[0069] The hardware reset component 103 includes a first switching element 105. The control terminal of the first switching element 105 is electrically connected to the long button working component 102, and the input terminal of the first switching element 105 is electrically connected to the hardware reset terminal RST_MCU of the microcontroller unit. The first switching element 105 is turned on under the action of the conduction control signal, so that the hardware reset terminal RST_MCU has a first level, and the first level causes the microcontroller unit to be reset.

[0070] Specifically, the key input component 101 refers to the key signal generation and input component, including the key switch element 104 and related circuits. The circuit configuration of the key input component 101 enables it to input corresponding key signals to the microcontroller unit and subsequent circuits (including the long key working component 102) according to the switching state of the key switch element 104. The push-button switch element 104 refers to a switching device that switches between on and off states based on received button operations, enabling controlled switching of the circuit it is connected to. For example, the push-button switch element 104 can be positioned between the power supply terminal VDD and the reference ground GND. When the button of the push-button switch element 104 is pressed, its circuit is turned on, causing the push-button input component 101 to output a low-level button signal; when the button of the push-button switch element 104 is released, its circuit is turned off, causing the push-button input component 101 to output a high-level button signal. The microcontroller unit can perform functions such as power on / off, checking device battery level, and switching operating modes based on the button signal received at the push-button input terminal KEY_IN. For example, when the microcontroller unit receives a short press signal (a low-level button signal of less than 1 second, shorter than a preset time) at its push-button input terminal KEY_IN, it can display the battery level on the display screen of the aerosol generating device. The microcontroller unit can also switch the power on / off state of the aerosol generating device when it receives a low-level button signal of two or three seconds (shorter than a preset time) at its push-button input terminal KEY_IN.

[0071] The long-button working component 102 refers to a switch driver component that provides a conduction control signal to the hardware reset component 103 based on the conduction duration of the button switch element 104. The circuit configuration of the long-button working component 102 enables it to generate a conduction control signal while the preceding button switch element 104 remains on for a preset time, thereby controlling the first switch element 105 in the subsequent hardware reset component 103 to conduct. For example, the long-button working component 102 may include a capacitor configured to be charged when the button switch element 104 is on, causing its voltage to continuously rise until, after a preset time, its voltage causes the first switch element 105 to conduct.

[0072] The hardware reset component 103 refers to the component that generates a first-level reset signal, including a first switching element 105 and its related circuitry. The circuit configuration of the hardware reset component 103 enables it to turn on the first switching element 105 according to the conduction control signal output by the long button working component 102, thereby sending a first-level reset signal to the hardware reset terminal RST_MCU to instruct the microcontroller unit to perform a reset. For example, the first switching element 105 can be located between the power supply terminal VDD and the reference ground GND, with its end closer to the power supply terminal VDD serving as its input terminal, which is electrically connected to the hardware reset terminal RST_MCU. The first switching element 105 can be a transistor such as a MOS transistor that can be controlled to switch on and off.

[0073] For example, when the microcontroller unit does not experience a system crash, the user can check the device's battery level, control the device's power on / off state, and switch the device's operating mode by pressing the button switch element 104. The operation process is as follows: If the button switch element 104 is not pressed for a long time, the long button operation component 102 will not generate a conduction control signal, keeping the first switch element 105 off. Therefore, the hardware reset component 103 will continuously output a second level to the microcontroller unit's hardware reset terminal RST_MCU. The microcontroller unit can maintain normal operation based on the second level input to the reset terminal. When the microcontroller unit is operating normally, the button input component 101 outputs the corresponding button signal to the microcontroller unit's button input terminal KEY_IN according to the user's operation on the button switch element 104. For example, if the user briefly presses the button switch element 104, the microcontroller unit displays the battery level on the display screen of the aerosol generating device; if the user presses the button switch element 104 for two or three seconds, the microcontroller unit switches the power on / off state of the aerosol generating device.

[0074] If the microcontroller unit (MCU) freezes, the user can reset it by pressing and holding the button switch element 104. The process is as follows: If the button switch element 104 is pressed and held for a preset time, the long-press working component 102 will generate a conduction control signal, causing the first switch element 105 to conduct. This, in turn, causes the hardware reset component 103 to output a first-level reset signal to the microcontroller unit's hardware reset terminal RST_MCU. The microcontroller unit then resets and restarts based on the first level signal input to its hardware reset terminal RST_MCU.

[0075] The reset circuit in the aerosol generating device provided in this embodiment includes a key input component, a long-press working component, and a hardware reset component. In the key input component, the key switch element is electrically connected to the key input terminal of the microcontroller. When the conduction time is less than a preset time, the corresponding key signal is output to the key input terminal based on the conduction time and number of on / off cycles of the key switch element. The long-press working component is electrically connected to the key switch element and is configured to generate a conduction control signal when the key switch element remains on for more than a preset time. In the hardware reset component, the control terminal of the first switch element is electrically connected to the long-press working component, and the input terminal of the first switch element is electrically connected to the hardware reset terminal of the microcontroller. The first switch element conducts under the action of the conduction control signal, so that the hardware reset terminal has a first level, realizing the reset activation of the microcontroller. This circuit can both send functional signals to the microcontroller based on user operation when the microcontroller is working normally and reset and activate the microcontroller based on the user's long-press operation when the microcontroller malfunctions, reducing the impact of device malfunctions on users and greatly improving the reliability of the device.

[0076] Optionally, Figure 5 This is a schematic diagram of another reset circuit provided in an embodiment of this application. Based on the foregoing embodiments, refer to... Figure 5 The long button working component 102 includes a second switching element 201 and a delay capacitor C1.

[0077] The second switching element 201 and the delay capacitor C1 are connected in series between the power supply terminal VDD and the reference ground GND. The control terminal of the second switching element 201 is electrically connected to the push-button switch element 104. The first connection point between the second switching element 201 and the delay capacitor C1 is also electrically connected to the control terminal of the first switching element 105.

[0078] The second switching element 201 is turned on in response to the turn-on of the push-button switch element 104, so that the power supply terminal VDD continuously charges the delay capacitor C1 for a preset time, thereby raising the potential of the turn-on control signal of the first connection point to the turn-on potential of the first switching element 105.

[0079] Specifically, the second switching element 201 is a charging start switch for the delay capacitor C1. It is turned on or off according to the operating state of the push-button switch element 104. For example, when the push-button switch element 104 is pressed, the second switching element 201 is turned on to charge the delay capacitor C1 using the power supply terminal VDD; when the push-button switch element 104 is not pressed, the second switching element 201 is not turned on, disconnecting the electrical connection between the power supply terminal VDD and the delay capacitor C1. For example, the second switching element 201 can be a transistor such as a MOSFET that can be controlled to switch on and off.

[0080] The voltage across the delay capacitor C1 serves as the control signal for triggering the first switching element 105 to turn on or off. If the delay capacitor C1 has not been charged for the preset time period, the potential at its far-ground terminal does not reach the turn-on potential of the first switching element 105, and the first switching element 105 remains off. Once the delay capacitor C1 is charged for the preset time, its far-ground terminal potential increases to the turn-on potential of the first switching element 105, triggering the first switching element 105 to turn on.

[0081] For example, in the absence of a system crash in the microcontroller unit, the user can check the device's battery level, control the device's power on / off state, and switch the device's operating mode by briefly pressing the button switch element 104 for a preset duration. The process is as follows: If the button switch element 104 is not pressed, the second switch element 201 will not conduct, and the potential at the far end of the delay capacitor C1 will not reach the conduction potential of the first switch element 105. If the button switch element 104 is only pressed briefly, the second switch element 201 will conduct briefly, but its conduction duration will not reach the preset time, and the potential at the far end of the delay capacitor C1 will not reach the conduction potential of the first switch element 105. In both cases, the first switch element 105 will remain off, and the hardware reset component 103 will continuously output a second level to the hardware reset terminal RST_MCU of the microcontroller unit. The microcontroller unit can maintain normal operation based on the second level input to the reset terminal. When the microcontroller is working normally, the key input component 101 outputs the corresponding key signal to the key input terminal KEY_IN of the microcontroller based on the user's short-time pressing operation of the key switch element 104. For example, if the user briefly presses the key switch element 104, the microcontroller displays the battery level on the display screen of the aerosol generating device; if the user presses the key switch element 104 for two or three seconds, the microcontroller switches the on / off state of the aerosol generating device.

[0082] If the microcontroller malfunctions, the user can reset it by pressing and holding the button switch element 104 for a preset time. The process is as follows: If the button switch element 104 is pressed and held for a preset time or longer, the second switch element 201 will remain in a conducting state for a preset time or longer. The power supply terminal VDD will charge the delay capacitor C1 for a preset time or longer, causing the voltage at the far-ground terminal of the delay capacitor C1 to reach or exceed the conduction potential of the first switch element 105. The first switch element 105 conducts, thereby the hardware reset component 103 outputs a first-level reset signal to the hardware reset terminal RST_MCU of the microcontroller. The microcontroller then resets and restarts according to the first level input to its hardware reset terminal RST_MCU.

[0083] In the aerosol generating device provided in this embodiment, the long-button working component includes a second switching element and a delay capacitor. The second switching element and the delay capacitor are connected in series between the power supply terminal and the reference ground. The control terminal of the second switching element is electrically connected to the push-button switch element, and the first connection point between the second switching element and the delay capacitor is also electrically connected to the control terminal of the first switching element. The second switching element is turned on in response to the turn-on of the push-button switch element, so that the power supply terminal continuously charges the delay capacitor for a preset time. The conduction control signal of the first connection point rises to the conduction potential of the first switching element, realizing that the hardware reset terminal has a first level, resetting the microcontroller unit, and setting the delay capacitor and the second switching element. This ensures that the signal generated by the pressing operation is transmitted to the hardware reset terminal after a preset delay, distinguishing between the user's normal operation and the reset operation, greatly preventing the misuse of the reset function, and further improving the reliability of the circuit.

[0084] Optionally, Figure 6 This is a schematic diagram of another reset circuit provided in the embodiments of this application. Based on the foregoing embodiments, refer to... Figure 6 The long button operating component 102 also includes a first resistor R1 and a second resistor R2. The first resistor R1 is connected between the second switching element 201 and the power supply terminal VDD. The second resistor R2 is connected between the first connection point and the reference ground GND. The resistance values ​​of the first resistor R1 and the second resistor R2 are related to a preset time, and the capacitance value of the delay capacitor C1 is positively correlated with the preset time.

[0085] Specifically, adjusting the value of the delay capacitor C1 allows for adjustment of the preset time. With the resistance values ​​of the first resistor R1 and the second resistor R2 remaining unchanged, if it is necessary to extend the preset time for triggering the reset, the value of the delay capacitor C1 can be increased accordingly, increasing the time it takes for it to charge to the conduction potential of the second switching unit. If it is necessary to shorten the preset time for triggering the reset, the value of the delay capacitor C1 can be decreased accordingly, shortening the time it takes for it to charge to the conduction potential of the second switching unit.

[0086] Adjusting the resistance values ​​of the first resistor R1 and / or the second resistor R2 can also achieve fine-tuning of the preset time. For example, increasing the resistance value of the first resistor R1 and / or decreasing the resistance value of the second resistor R2 can appropriately increase the preset time, while decreasing the resistance value of the first resistor R1 and / or increasing the resistance value of the second resistor R2 can appropriately decrease the preset time.

[0087] For example, during the maintenance or factory testing of the aerosol generating device, the operator can accurately adjust the delay reset time of the reset circuit 100 to a preset time by replacing at least one of the following: a delay capacitor C1 with a different capacitance value, a first resistor R1 with a different resistance value, and a second resistor R2 with a different resistance value. For instance, if the preset time is 5 seconds, and the current reset circuit 100 triggers the hardware reset of the microcontroller unit when the push-button switch element 104 is continuously pressed for 3 seconds, the operator can first replace the delay capacitor C1 with one having a larger capacitance value. After replacing the delay capacitor C1, the reset circuit 100 triggers the hardware reset of the microcontroller unit when the push-button switch element 104 is continuously pressed for 5.8 seconds. Subsequently, to ensure the reset time accurately reaches the preset time of 5 seconds, the operator can adaptively adjust the resistance values ​​of the first resistor R1 and the second resistor R2. For example, the operator can replace the first resistor R1 with one with a smaller resistance value and / or replace the second resistor R2 with one with a larger resistance value. After the adaptive replacement of the first resistor R1 and the second resistor R2, the reset time can accurately reach the preset time of 5 seconds.

[0088] The aerosol generating device provided in this embodiment further includes a first resistor and a second resistor in the long-press reset button working component. The first resistor is connected between the second switching element and the power supply terminal. The second resistor is connected between the first connection point and the reference ground. The resistance values ​​of the first and second resistors are related to a preset time, and the capacitance value of the delay capacitor is positively correlated with the preset time. By using the delay capacitor, the first resistor, and the second resistor, the preset time is accurately set, greatly improving the setting accuracy of the long-press reset button time.

[0089] Optionally, Figure 7 This is a schematic diagram of another reset circuit provided in the embodiments of this application. Based on the foregoing embodiments, refer to... Figure 7 The long button working component 102 also includes a third switching element 401. The third switching element 401 is connected between the first connection point a and the reference ground GND. The control terminal of the third switching element 401 is electrically connected to the button switch element 104. The third switching element 401 is turned on in response to the button switch element 104 being turned off, so as to discharge the charge of the delay capacitor C1 and restore the first switching element 105 to be turned off.

[0090] Specifically, the third switching element 401 is a discharge switch for the time-delay capacitor C1. When the third switching element 401 is turned on, the far ground terminal of the time-delay capacitor C1 can be grounded through the turned-on third switching element 401, thereby achieving a complete closure of the discharge circuit of the time-delay capacitor C1. The switching state of the third switching element 401 is opposite to that of the second switching element 201. Thus, when the time-delay capacitor C1 is charging, the third switching element 401 can remain off to keep the time-delay capacitor C1 from discharging; and after the time-delay capacitor C1 stops charging, the third switching element 401 turns on to trigger the discharge of the time-delay capacitor C1. For example, when the second switching element 201 is low-level turned on, the third switching element 401 can be high-level turned on, thereby achieving the opposite state of the two. In addition to the different on and off conditions of the switching elements themselves, the same state of the push-button switch element 104 can also be achieved by different settings of the circuits surrounding the two switching elements, corresponding to the second switching element 201 and the third switching element 401 being in opposite switching states.

[0091] For example, if the microcontroller unit does not experience a system crash, the user can check the device's battery level, control the device's power on / off state, and switch the device's operating mode by briefly pressing the button switch element 104 for a preset duration. The operation process is as follows: If the button switch element 104 is not pressed, the second switch element 201 remains off while the third switch element 401 remains on, the discharge circuit of the delay capacitor C1 is closed, and its far-ground potential will not reach the on-state potential of the first switch element 105. If the button switch element 104 is only pressed briefly, the second switch element 201 will briefly turn on while the third switch element 401 will briefly turn off. The duration of this state will not reach the preset time, so the delay capacitor C1 will not be charged sufficiently, and its far-ground potential will not reach the on-state potential of the first switch element 105. In both of these cases, the first switch element 105 will remain off, and the hardware reset component 103 will continuously output a second level to the hardware reset terminal RST_MCU of the microcontroller unit. The microcontroller unit can maintain normal operation based on the second level input to the reset terminal. When the microcontroller is working normally, the key input component 101 outputs the corresponding key signal to the key input terminal KEY_IN of the microcontroller based on the user's short-time pressing operation of the key switch element 104. For example, if the user briefly presses the key switch element 104, the microcontroller displays the battery level on the display screen of the aerosol generating device; if the user presses the key switch element 104 for two or three seconds, the microcontroller switches the on / off state of the aerosol generating device.

[0092] If the microcontroller malfunctions, the user can reset it by pressing and holding the button switch element 104 for a preset time. The process is as follows: If the button switch element 104 is pressed and held for a preset time or longer, the second switch element 201 will remain in a conducting state for a preset time or longer, while the third switch element 401 will remain in a continuously off state. With the second switch element 201 on and the third switch element 401 off, the power supply terminal VDD charges the delay capacitor C1 for a preset time or longer, without discharging. This allows the charge in the delay capacitor C1 to accumulate, and its voltage at its far-ground terminal reaches or exceeds the conduction potential of the first switch element 105. The first switch element 105 then conducts, causing the hardware reset component 103 to output a first-level reset signal to the hardware reset terminal RST_MCU of the microcontroller. The microcontroller then resets and restarts based on the first level signal input to its hardware reset terminal RST_MCU.

[0093] When the user stops pressing the button, causing the button switch element 104 to turn off, the second switch element 201 turns off while the third switch element 401 turns on again. This closes the discharge circuit of the delay capacitor C1, allowing the current in C1 to be quickly discharged. Consequently, the voltage at the far-ground terminal of the delay capacitor C1 rapidly decreases below the on-state potential of the first switch element 105, causing it to turn off. The hardware reset component 103 then outputs a second level to the hardware reset terminal RST_MCU of the microcontroller unit. The microcontroller unit can then resume normal operation based on the second level input to the reset terminal.

[0094] The aerosol generating device provided in this embodiment further includes a third switching element in the long-button working component. The third switching element is connected between the first connection point and the reference ground. The control terminal of the third switching element is electrically connected to the push-button switch element. The third switching element turns on in response to the push-button switch element turning off, thereby discharging the charge of the delay capacitor and restoring the first switching element to turn off. This achieves rapid recovery of the first switching element after the microcontroller unit is reset, thus enabling rapid restoration of normal operation of the microcontroller unit and further improving the reliability of the device.

[0095] Optionally, Figure 8 This is a schematic diagram of another reset circuit provided in the embodiments of this application. Based on the foregoing embodiments, refer to... Figure 8 The first switching element 105 includes a first N-type MOS transistor. The gate of the first N-type MOS transistor is electrically connected to the long button working component 102. The drain of the first N-type MOS transistor is electrically connected to the power supply terminal VDD and the hardware reset terminal RST_MCU of the microcontroller unit, respectively. The source of the first N-type MOS transistor is electrically connected to the reference ground GND.

[0096] The second switching element 201 includes a second P-type MOSFET, the gate of which is electrically connected to the push-button switch element 104; the source of which is electrically connected to the power supply terminal VDD; and the drain of which is electrically connected to the reference ground GND via a delay capacitor C1.

[0097] The third switching element 401 includes a third N-type MOSFET, the gate of which is electrically connected to the push-button switch element 104; the source of which is electrically connected to the reference ground GND; and the drain of which is electrically connected to the first connection point a.

[0098] The key input component 101 also includes a third resistor R3, which, along with the key switch element 104, is connected in series between the power supply terminal VDD and the reference ground GND. The second connection point b between the third resistor R3 and the key switch element 104 serves as an output terminal, electrically connected to the key input terminal KEY_IN. The long key operation component 102 also includes a fourth resistor R4, which is positioned between the control terminal of the third switch element 401 and the reference ground GND. The hardware reset component 103 also includes a fifth resistor, which is positioned between the power supply terminal VDD and the input terminal of the first switch element 105. The output terminal of the first switch element 105 is also electrically connected to the reference ground GND.

[0099] The hardware reset component 103 also includes a filter capacitor C2, which is located between the input terminal of the first switching element 105 and the reference ground GND. The filter capacitor C2 can filter the signal output at the hardware reset terminal RST_MCU, thereby reducing the impact of electrical signal fluctuations in the reset circuit 100 on the microcontroller unit and increasing the reliability of the aerosol generation device.

[0100] For example, Figure 9 This is a schematic diagram of a simulation model of a reset circuit provided in an embodiment of this application. Figure 10 The waveform diagrams of signals at various points in the simulation model of a reset circuit provided in this application embodiment are combined with... Figure 8 , Figure 9 and Figure 10 , Figure 10The waveform diagram shows time on the horizontal axis and voltage on the vertical axis. A red triangle and its connected red line indicate the initial time t1 when the button is pressed, and a blue triangle and its connected blue line indicate the conduction time t2 of the first switching element. In circuit simulation software (e.g., Multisim), the power supply voltage VDD is 3.0V. The first switching element 105 and the third switching element 401 are N-type MOSFETs (model 2N6659), the second switching element 201 is a P-type MOSFET (model BSH205), the delay capacitor C1 has a capacitance of 68μF, the filter capacitor C2 has a capacitance of 0.1μF, and the resistances of the first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, and fifth resistor are 51kΩ, 100kΩ, 10kΩ, 200kΩ, and 4.7kΩ, respectively. An oscilloscope is set up in the simulation model. The first probe X1 of the oscilloscope is set at the second connection point b between the push-button switch element 104 and the third resistor R3. The oscilloscope can use the first probe X1 to acquire the key signal output by the push-button input component 101 to the key input terminal KEY_IN of the microcontroller and display its waveform with red lines. Figure 7 In the middle; the second probe X2 of the oscilloscope is set at the first connection point a between the second switching element 201 and the delay capacitor C1. The oscilloscope can use the second probe X2 to acquire the voltage signal on the delay capacitor C1 and display it as a purple line. Figure 7 In the middle; the third probe X3 of the oscilloscope is set at the input terminal of the first switching element 105. The oscilloscope can use the third probe X3 to acquire the reset signal output by the hardware reset component 103 to the hardware reset terminal RST_MCU of the microcontroller and display it with blue lines. Figure 7 middle.

[0101] Continue to combine Figure 8 and Figure 9If the push-button switch element 104 is pressed and held for more than 5.475 seconds, the second P-type MOSFET will remain on for more than 5.47 seconds, allowing the power supply terminal VDD to charge the delay capacitor C1 for more than 5.47 seconds. This causes the voltage at the far-ground terminal of the delay capacitor C1 to reach a high potential above the voltage required for the first N-type MOSFET to turn on 5.475 seconds after the button is pressed. The first N-type MOSFET turns on, and the hardware reset component 103 outputs a low-level (0V) reset signal to the hardware reset terminal RST_MCU of the microcontroller unit. The microcontroller unit then resets and restarts based on the low-level signal received at its hardware reset terminal RST_MCU. When the user stops pressing the button, causing the button switch element 104 to turn off, the second P-type MOSFET turns off while the third N-type MOSFET turns on again. The discharge circuit of the delay capacitor C1 closes, allowing the current in C1 to be quickly discharged. This causes the voltage at the far-ground terminal of C1 to momentarily drop below the on-state potential of the first N-type MOSFET, causing it to turn off instantly. Consequently, the hardware reset component 103 outputs a high level to the hardware reset terminal RST_MCU of the microcontroller unit. The microcontroller unit can then resume normal operation based on the high level input to the reset terminal.

[0102] In the aerosol generating device provided in this embodiment, each switching element is configured as a MOSFET. The button input component also includes a third resistor, which is connected in series with the button switch element between the power supply terminal and the reference ground. The second connection point between the third resistor and the button switch element serves as the output terminal and is electrically connected to the button input terminal. The long button operating component also includes a fourth resistor, which is located between the control terminal of the third switch element and the reference ground. The hardware reset component also includes a fifth resistor, which is located between the power supply terminal and the input terminal of the first switch element. The output terminal of the first switch element is also electrically connected to the reference ground. The hardware reset component also includes a filter capacitor, which is located between the input terminal of the first switch element and the reference ground. The filter capacitor can filter the signal output at the hardware reset terminal, thereby reducing the impact of electrical signal fluctuations in the reset circuit on the microcontroller unit and increasing the reliability of the aerosol generating device.

[0103] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0104] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An aerosol generating device comprising a housing and an external key provided on the housing, characterized in that, The shell is further provided with a micro control unit and a reset circuit for resetting the micro control unit; The reset circuit comprises: The key input assembly comprises a key switch element, which switches on and off in response to user operation of the external key; The long key working assembly is electrically connected with the key switch element and is configured to generate a conduction control signal when the key switch element remains on for more than a preset time; The hardware reset assembly comprises a first switch element, the control end of which is electrically connected with the long key working assembly, and the input end of which is electrically connected with the hardware reset end of the micro control unit; the first switch element is turned on under the action of the conduction control signal, so that the hardware reset end has a first level, which causes the micro control unit to reset.

2. The aerosol-generating device of claim 1, wherein, The long key working assembly comprises a second switch element and a delay capacitor; The second switch element and the delay capacitor are connected in series between a power supply end and a reference ground, the control end of the second switch element is electrically connected with the key switch element, and a first connection point between the second switch element and the delay capacitor is also electrically connected with the control end of the first switch element; The second switch element is turned on in response to the on of the key switch element, so that the power supply end continuously charges the delay capacitor for more than the preset time, thereby raising the potential of the conduction control signal at the first connection point to the conduction potential of the first switch element.

3. The aerosol-generating device of claim 2, wherein, The long key working assembly further comprises a third switch element; The third switch element is connected between the first connection point and the reference ground, the control end of the third switch element is electrically connected with the key switch element, and the third switch element is turned on in response to the off of the key switch element, so as to discharge the electric quantity of the delay capacitor and restore the first switch element to off.

4. The aerosol-generating device according to claim 2 or 3, wherein, The capacitance value of the delay capacitor is positively correlated with the preset time.

5. Aerosol-generating device according to any of claims 2 to 3, wherein The long key working assembly further comprises a first resistor and a second resistor; The first resistor is connected between the second switch element and the power supply end; The second resistor is connected between the first connection point and the reference ground; The resistance values of the first resistor and the second resistor are related to the preset time.

6. The aerosol-generating device of any of claims 1-3, wherein, The first switch element comprises a first N-type MOS tube, the gate of which is electrically connected with the long key working assembly; the drain of the first N-type MOS tube is respectively electrically connected with a power supply end and the hardware reset end of the micro control unit; and the source of the first N-type MOS tube is electrically connected with a reference ground.

7. The aerosol-generating device of claim 2 or 3, wherein, The second switch element comprises a second P-type MOS tube, the gate of which is electrically connected with the key switch element; the source of the second P-type MOS tube is electrically connected with the power supply end; and the drain of the second P-type MOS tube is electrically connected with the reference ground through the delay capacitor.

8. The aerosol-generating device of claim 3, wherein, The third switch element comprises a third N-type MOS tube, a gate of the third N-type MOS tube being electrically connected with the key switch element; a source of the third N-type MOS tube being electrically connected with the reference ground; and a drain of the third N-type MOS tube being electrically connected with the first connection point.

9. The aerosol-generating device of claim 1, 2, 3, or 8, wherein, The key switch element is electrically connected with a key input end of the micro control unit, and the key input assembly is configured to output a corresponding key signal to the key input end according to the on duration and the on-off times of the key switch element in a case that the on duration of the key switch element is less than the preset time, wherein the key signal is used to instruct the micro control unit to realize at least one function of viewing power, regular booting and regular shutting down. 10.The aerosol-generating device of claim 9, wherein, The key input assembly further comprises a third resistor, the third resistor and the key switch element being connected in series between a power supply end and a reference ground in sequence; a second connection point between the third resistor and the key switch element serving as an output end and being electrically connected with the key input end.

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